Art
[1]
The present invention relates to a melt processing apparatus, and a melt processing method, and more particularly, to a melt treatment apparatus which can effectively remove the inclusions and the molten material processing method using the same related to a.
BACKGROUND
[2]
In the continuous casting steelmaking sector is excellent in quality and uniformity compared to conventional crude silsuyul goebeop. Thus, there is a lot of research being done against such a continuous casting fishing equipment and fishing techniques. As a result, except for special purposes and minority it became almost any type of steel, including alloy steel can be produced by a continuous casting process. Fishing equipment for such continuous casting has a continuous casting plant.
[3]
Continuous casting plant is a plant, which when supplied with the molten steel from the steel refining facility to prepare a cast slab. Continuous casting equipment steel (molten steel) carrying the ladle (Ladle), when supplied with molten steel from the ladle temporary storage tundish (Tundish), solidified continuously as the primary this slab (Slab) Given supplying molten steel from a tundish to a mold (mold), sikimyeo continuous secondary cooling of the slab is pulled out from the mold is configured as a cooling to do a series of forming operations to.
[4]
The molten steel in the tundish is taken as a given residence time, the inclusions (inclusion) is separated injured, and slag is stabilized, thereby preventing upset wealth. Then, the molten steel is supplied into the mold to form a solidified layer in the initial cast shape. At this time, the cast surface quality is determined.
[5]
That is, the cast slab surface quality in the mold by the cleanliness of the inclusions in the molten steel, the degree is determined. For example, if the cleanliness of the molten steel for inclusions is poor, and because of its inclusion may result in surface defects in the cast steel, it can be said by the inclusion clogging of the immersion nozzle is lowered slab surface quality and a fault occurs in the molten steel flow.
[6]
Molten steel according to the degree of the molten steel, while the residence time at a predetermined turn-dish inclusions separation portion, the degree of purity depends on the inclusion significantly. The degree of floatation of inclusions is proportional to the residence time in the molten steel tundish.
[7]
Thus, in the prior art, by building a dam (Dam) and Weir (Weir) as a way to prolong the residence time of the molten steel, inside the tundish in a turn-dish by controlling the flow of molten steel, and adjusting the residence time of the molten steel.
[8]
However, if the size of the inclusions incorporated into the molten steel than 30㎛, inclusion is longer than the residence time of the time it takes to separate injuries steel. For this reason, the size of the inclusions is less than 30㎛ it is difficult to remove by using the dams and weirs of the tundish problems.
[9]
(Patent Document 1) A KR10-2013-0076187
[10]
(Patent Document 2) A KR10-2015-0073449
Detailed Description of the Invention
SUMMARY
[11]
The present invention provides a melt processing apparatus, and melt processing method capable of the gas into the interior of the container filled with melt is injected effectively remove inclusions.
[12]
The present invention provides a melt processing apparatus, and melt processing method capable of forming a rotational flow of the molten material with a gas that is injected into the container filled with melt is effectively remove inclusions.
[13]
The present invention provides a melt processing apparatus, and melt processing method which control the number of flow direction and rotation of the rotational flow to be formed into the container filled with melt is effectively remove inclusions.
[14]
The present invention provides a bath surface and are effective in preventing possible melt processing apparatus and processing method the melt and contact with air is formed in the melt by the rotational flow of the melt contained in the vessel.
Problem solving means
[15]
Melt processing apparatus according to an embodiment of the present invention, the inner container is opened to the upper side, is provided on an upper portion the melt injection, the hole formed on at least one side of the bottom; The guide member is installed spaced apart from the side of the hole from the melt inlet; And it is spaced toward the molten material injection part in the guiding member, a gas inlet provided in the bottom portion; and a.
[16]
The guide member is in the melt inlet is spaced toward the hole, and extends in a width direction, and spaced apart from the bottom portion first member which is installed on the side walls a longitudinal direction of the vessel; may include.
[17]
The guide member is in the first member is spaced toward the hole, and extends in a width direction is in contact with the bottom of the second member provided on the side walls a longitudinal direction of the vessel; may include.
[18]
In the gas injection unit, wherein the first member at or spaced from the side of the melt injection unit, or the second member may be mounted spaced apart from the side of the first member.
[19]
Extend in the width direction and inside of the opening to the lower side, and the guide member's portion facing the base body and the injection chamber, which is installed at an upper portion of the vessel; may include.
[20]
Each of the guide member, the gas injection unit, said chamber portion and the hole can be located on either side of the longitudinal direction in the center is provided with a plurality of the melt infusion section.
[21]
The gas injection portion, extends in the width direction, is projected to the upper surface of the bottom portion, may be lower when a larger than the height of the first member.
[22]
The gas injection portion may be located relatively close to the first member than the melt inlet.
[23]
The gas injection unit, to adjust the spacing distance with respect to the first member, and in the gas injection unit to control at least one of a number of the melt flow direction and the rotation in the interior of the container by the gas to be injected into the interior of the container .
[24]
The gas injection unit includes a plurality of slits are formed on the upper surface, it is possible for the gas injected into the interior of the container through the slit.
[25]
The gas injection unit is installed on the floor, the blocks in which the slits are formed on an upper surface, a gas inlet tube communicating with the slit and through the container formed in the top surface of the block; And it is attached to the gas inlet tube, a control valve for controlling the opening and closing mode of the gas inlet tube; may include.
[26]
Said chamber portion, the lid part extending in the transverse direction; Extend in the width direction, the first member and spaced apart on either side of the center in the longitudinal direction are respectively mounted on a lower surface of the lid portion, the wall portions that are in contact or spaced apart in the length direction of the side walls of the container; The length extending in a direction, are respectively attached to the widthwise side edges of the lead portion, the flange portion to connect the wall portions; may contain.
[27]
The lead portion, the mounting height can be determined to be spaced apart from the upper surface of the molten material injected into the upper surface of the container or of the first member.
[28]
Of the wall portions, at the gas inlet first wall portion which is located to be spaced apart toward the molten material injection portion; It may comprise; and a second wall portion which is located spaced from the upper side of the second member.
[29]
The first wall portion, when the formed height than the upper surface of the first member high, it is possible by immersing the molten material injected into the interior of the container.
[30]
The second wall portion, when the formed lower in height than the upper surface of the first member, it is possible by immersing the molten material injected into the interior of the container.
[31]
The second wall portion, and wherein the inclined surface on a side opposite to first wall portion, a vertical surface, a curved surface, and at least one of a concave groove may be formed.
[32]
The second wall portion, the flow rate of molten material to the second by adjusting the distance of the member, the flow of the melt overflowing the top of the first member, the side of the flow of the melt and the gas injecting section to flow toward the holes respectively, it can be controlled.
[33]
It formed so as to be supplied to a gas, and is formed so as to penetrate parts of the chamber can be a pipe, and a gas exhaust communicating with the interior may comprise at least one of the exhaust pipe, communicating with the internal through parts of the chamber.
[34]
The chamber portion lift rotatably supported, and the melt injected into the interior of the first operating part, and a part slidably supporting the chamber and the container to adjust the height of the chamber portion along the upper surface height of the molten material injected into the interior of the container of or longitudinally along the bath surface generating position may include at least one of the second operating unit, for controlling the position of the chamber portion.
[35]
In the first member is spaced to a side opposite to the gas injection section, a gas injection part 2 is provided in the bottom part it may further include a.
[36]
The melt injection unit is formed to allow the molten steel to pass through, it can be detachably mounted on the ladle of a continuous casting plant.
[37]
Gas is injected into the interior of the vessel through the gas injection portion may comprise an inert gas.
[38]
Melt processing method according to an embodiment of the present invention, the interior is opened to the upper side, a hole is formed in the bottom part, it is added the melt injection provided at the top, prepare a container provided with a guide member between the hole and the melt inlet process; The process of injecting the molten material in the interior of the vessel; The process of flooding the melt to the upper portion of the guide member; Include; gas through an injection, injecting the gas into the container between the guide member and the melt inlet and the process for forming a rotational flow of the melt.
[39]
By the chamber parts, the process of forming the vacuum atmosphere or an inert atmosphere in the area surrounding the bath surface and the generation position of the melt by the gas injected into the interior of the vessel; may contain.
[40]
Said guide member being spaced from the side of the hole from the melt inlet, are spaced apart from the floor and spaced from the side of the hole in the first member, the first member is mounted on the side walls a longitudinal direction of the container, to the floor the contact process of, flooding the melt to a second member mounted to the side walls the longitudinal direction of the vessel, may comprise the step of flooding the melt in the first member and the second member thereon.
[41]
Process to form the rotational flow is through the gas injection unit, injection of gas into the container between the first member and the melt inlet and the process for forming a rotational flow of the melt; may contain.
[42]
Process to form the rotational flow is through the gas injection unit, injection of gas into the interior of the vessel between the second member and the first member and the process for forming a rotational flow of the melt; may contain.
[43]
Process to form the rotational flow, the through parts of the gas injection, the first member and the molten material injected gas into the interior of the container between the inlet and the first and spaced apart from the first member to the side opposite to the gas injection parts of the floor may comprise; through the second gas injection unit is installed on, and injecting gas into the interior of the vessel between the second member and the first member, comprising the steps of: forming a rotational flow of the melt.
[44]
Process to form the rotational flow is, by controlling the gas injection parts of the gas injection position relative to the guide member, the step of controlling at least any one of a number of times the flow direction with the rotation of the electric current; may contain.
[45]
Process to form the rotational flow, the process for controlling the gas injection by the gas injecting section to the at least one method of continuous and intermittent manner; may contain.
[46]
The time course of forming the current is, by controlling the immersion height of the chamber portion for the molten material, by flooding the flow rate of molten material to flow toward the holes to overflow the upper portion of the guide member and the upper portion of the guide member the gas the process of each control the flow rate of the melt flowing toward the injecting section; may contain.
[47]
Process to form the rotational flow, the second gas injection through an injection gas into the interior of the container between the base injection part and the guide member and the process of controlling at least one of the number of flow direction with the rotation of the rotational flow; the can be included.
[48]
The process of forming the current time is the second step of differently controlling the gas injection parts of the gas injection amount, and at least one of injection with at least one of the gas injection parts of the gas injection volume and injection method; may contain.
[49]
The melt comprises molten steel and the gas may include inert gas.
Effects of the Invention
[50]
According to an embodiment of the present invention, it is possible to gas into the interior of the container filled with melt is injected effectively remove inclusions in a manner to contact with the inclusions. Further, it is possible to melt forming a rotational flow of the molten material with a gas that is injected into the container filled by removing inclusions in a manner to increase the contact frequency of the gas inclusions more effectively. Further, it is possible to melt to control the number of flow direction and rotation of the rotational flow formed in the interior of the container to remove the inclusions in a manner to significantly increase the contact frequency of the gas inclusions more effectively contained.
[51]
Further, according to the embodiment of the present invention, it is possible to the bath surface or formed on the melt effectively prevented from contacting the atmosphere by the rotational flow of the melt contained in the vessel can be prevented from re-oxidation and contamination of the melt effectively.
[52]
For example, when applied to a continuous casting process for steel mills, by injecting argon gas into the inside of the turn is that the refined molten steel containing dish forms a plurality of bubbles, and, Al at the interface thereof 2 O 3 or SiO 2 for collecting various types of inclusions, such as It can effectively remove inclusions in the way. Further, the dam and weir the injection position of the argon gas flow direction and the rotation of the rotational flow with forming a rotational flow of the molten steel as a gas to be injected into the interior of the tundish prescribed by a predetermined position of the building to the inside of the turn-dish number can be controlled. This can be used to remove the inclusions, in particular fine inclusions in a manner to significantly increase the contact frequency of the fine inclusions of 30㎛ than for argon gas or a cell more effectively.
[53]
In addition, the method of providing a chamber or bath surface forming position of the molten steel by the rotational flow of liquid steel contained in the tundish, and was immersed in the lower portion of the chamber to surround and bath surface in the molten steel, injecting an inert gas to the interior of the chamber, or bath surface of the molten steel can be effectively prevented from contact with the atmosphere. To use it, it is possible to prevent the re-oxidation and contamination of the molten steel efficiently.
Brief Description of the Drawings
[54]
Figure 1 is a schematic view of the melt processing apparatus in the embodiment;
[55]
Figure 2 is a plan view of the melt processing apparatus in the embodiment;
[56]
3 is a cross-sectional view of the melt processing apparatus in the embodiment;
[57]
Figure 4 is a state diagram illustrating the inclusion removal method according to an embodiment of the invention.
[58]
Figure 5 is a view showing an inclusion removal process and result in the embodiment;
[59]
Figure 6 is a view showing a modeling of the melt processing apparatus for flow analysis of the melt in the embodiment;
[60]
Figure 7 shows a flow analysis of the melt in the embodiment;
[61]
Figure 8 is a part of the melt processing apparatus according to the embodiments and modifications of the present invention.
[62]
Figure 9 is a schematic diagram of a melt processing apparatus according to a comparative example of the present invention.
[63]
Figure 10 is a view showing a processing result of the melt according to the comparative example of the present invention.
Mode for the Invention
[64]
With reference to the accompanying drawings, a description will be given of an embodiment of the present invention; However, the present invention is not limited to the embodiments set forth herein, it will be embodied in many different forms. Simply embodiments of the invention will be, and to complete the disclosure of the invention provided so as to those of ordinary skill will fully convey the concept of the invention known in the art. And figures may be exaggerated in order to explain the embodiment of the invention, the same reference numerals in the drawings refers to the same element.
[65]
Of terms for explaining the embodiment of the present invention, the "upper" and "lower" refers to each of the upper and lower parts, as part of the component. In addition, it refers to the range on the ground, or acts directly or indirectly on the top and bottom surfaces of the "under" and "on" are the components.
[66]
The present invention when supplied with melt about to effectively remove inclusions from the melt, the melt processing apparatus and processing method in the melt during processing is supplied to the subsequent equipment while staying a predetermined time. Hereinafter will be described in detail with an embodiment, based on the continuous casting plant and process of the steel mill. However, the present invention can be applied variously to various plants and processes of various industries to process a variety of melt.
[67]
1 is a schematic diagram of a melt processing apparatus according to an embodiment of the present invention, Figure 2 is a plan view of the melt processing apparatus in the embodiment; In addition, Figure 3 is a cross-sectional view of the melt processing apparatus in the embodiment; Figure 4 is a state diagram illustrating the method of removing inclusions in the embodiment;
[68]
1 to 3, the melt processing apparatus according to an embodiment of the present invention, the interior is opened to the upper side, it is provided with a melt inlet (1) at the top, the hole on at least one side of the bottom part 13 installation (14) the container (10) is formed, the melt inlet (1) hole 14, the guide member, is spaced toward the molten material injection part (1) in the guide member, the bottom portion 13, which is provided spaced apart from the side in which includes a gas injecting part 400. Also, see the melt processing apparatus according to an embodiment of the present invention, it extends in the width direction (X) and the inside is opened to the lower side, facing the guide member and a gas injection unit 400, provided at an upper part of the container 10 which may include a chamber (500). On the other hand, the guide member and a gas injection unit 400 and the chamber portion 500 and the hole 14 is provided with a plurality of each, may be around the melt inlet (1), located on either side of the longitudinal direction (Y) .
[69]
Melt (M) may comprise a molten steel. The molten steel may be provided in the polishing is completed, steel plant, for transport containers, for example contained in a ladle (not shown) of a continuous casting plant can be carried to the upper side of the vessel 10.
[70]
The melt inlet (1) may be a refractory nozzle of the molten steel is formed to be hollow to enable passage. The melt inlet (1) may include a shroud nozzle (nozzle shroud). The melt inlet (1) may be mounted on the support manipulator (manipulator) provided on the outside of the container 10. The melt inlet (1) is coupled to the collector of the nozzle below (collector nozzle) at the rising time of the manipulator (not shown) may communicate with the interior of the future. The melt inlet (1) it may be spaced a predetermined height position in the bottom part 13 of container 10. The melt inlet (1) has a lower portion to be immersed in the melt (M) by implanting As the melt (M) into the interior of the vessel 10.
[71]
On the other hand, gas (g) is injected into the container 10 through the gas injection unit 400 may include an inert gas. The inert gas can include argon gas (Ar).
[72]
The vessel 10 may include a protruding wall formed along the periphery of the bottom part 13 and bottom part 13. Container 10 may be formed in the shape of the vessel interior is opened to the upper side. In this case, the side wall portion may include a longitudinal side walls 12 and the width direction of the side walls (11). The container 10 can maintain the shape is the outer surface, for example formed fatigue iron, the refractory material is built into the inner surface can be a melt (M) is received. The vessel 10 may include a turn-dish (tundish) of the continuous casting plant.
[73]
Vessel 10 is the longitudinal direction (Y) and width of the right and left relative to the center of the direction (X) may be formed in the shape of a rectangular symmetrical. In this case, the container 10 has a width in the longitudinal direction (Y) be greater than the width in the transverse direction (X). On the other hand, the top of the container 10 may be provided with a melt inlet (1). At this time, the melt inlet (1) in the center in the longitudinal direction (Y) and the transverse direction (X) of the container 10 can be aligned vertically.
[74]
Hole 14 may be formed on at least one side of the bottom part 13 of container 10. Hole 14 may be provided with a plurality. Holes 14, a plurality may be vertically formed through the side edges of the bottom part 13 in the vicinity of the side walls 11 being spaced apart in the longitudinal direction (Y), respectively, in the width direction. Hole 14 may be symmetrical relative to the center in the longitudinal direction (Y) and the transverse direction (X) of the container (10). Ungmeul (M) for housed into the container 10 through the hole 14 can be discharged to the lower side of the vessel 10. Hole 14 may be a gate 60 mounted.
[75]
The guide member may comprise a first member 20 and second member 30. Further, the guide member may be installed spaced apart from the side holes 14 from the melt inlet (1). At this time, the guide member may comprise all of the first member comprises only, or 20, the first member 20 and second member 30. That is, the guide member may include at least a first member (20). The first member 20 and second member 30 may be constructed in refractory material, receiving the melt (M) is housed inside of the container 10 to the desired height, for example the top of the continuous casting operation mid state molten steel level If, it is possible in a state immersed in the melt (M) to control the flow of the melt (M).
[76]
The first member 20 may be provided to enable control the flow of the melt (M) is injected into the container 10. Of the first member 20 includes a melt inlet (1) in holes 14 spaced apart side, and extends in a width direction (X), the upper side in the bottom part 13 are spaced a predetermined height, the vessel 10 longitudinal direction may be provided so as to connect between each other facing surfaces of the side walls (12). The first member 20 may include Weir (Weir) of the turn-dish. The first member 20 may be respectively provided in the spaced apart position to be provided with a plurality of the melt inlet (1) the center in the longitudinal direction (Y) a. The first member 20 includes a melt inlet (1) near the flow (P of the melt inlet (1) the melt (M) introduced into the container 10 through the first inner top or the inner side of) the container 10 It can be converted to the lower portion.
[77]
On the other hand, the first member 20 to the vicinity of the melt flow direction and flow rate, etc. can be controlled by adjusting at least one of a height, and if the upper surface height of the first member 20. Ben near the gas injection unit 400 Turi (Venturi) by the effects of the first member 20, the ideal height of the melt in the vicinity through the lower face of the first member 20 can be smoothly collected toward the gas injection unit 400 in the height can be determined when the first member (20). In addition, the upper surface of the first member 20 has an upper surface height can be determined to be completely locked by the ideal depth of the melt.
[78]
The second member 30 may be provided to enable control the flow of the melt (M) injected in the interior of the vessel 10. The second member 30 has a first spaced apart side hole 14 in the member 20, and extends in a width direction (X), in contact with the bottom portion (13) longitudinal side walls of the container 10 ( 12) it can be installed by connecting the faces facing each other. The second member 30 may include a dam (Dam) of the turn-dish. The second member 30 may be respectively provided in the spaced apart position to be provided with a plurality of the melt inlet (1) the center in the longitudinal direction (Y) a. At this time, the second member 30 may be biased toward the mounting position, the first member 20 on the side closer to the first member (20) than the holes 14. On the other hand, the lower a position of the second member 30, may be provided with a glass tanghol (not shown). Tanghol glass can be formed by the second member 30 at a position in contact with the bottom part 13 through in the length direction (Y).
[79]
The second member 30 includes a second of the melt (M) derived by flooding the top or bottom of the first member 20 in the direction toward the hole 14 from the melt inlet (1) toward the second member 30 second member 30 hole toward the vicinity of the flow holes 14, the side 14 near the flow (P 2 ) and the first member 20 once the current (P of the melt (M) toward the side C derived by dividing each of a) can do. On the other hand, the second member 30, the flow direction and flow rate of the melt (M) in the vicinity of at least one of the distance of the second member 30 with respect to the upper surface height, and the first member 20 of the second member 30 and the control is controllable.
[80]
The predetermined time of stay inside the first member 20 and a second melt (M) is the vessel 10 by the member 30 and may be isolated inclusions of injury. However, in the case of the fine inclusions of 30㎛ below, only the flow control by the first member 20 and second member 30, it is difficult to remove injury. This is the first fully member 20 and the melt (M) in the interior of the second case of the flow control using only the member 30, during the time that the fine inclusions of less 30㎛ be separated injury, the vessel 10 because it can not be stayed.
[81]
Thus, between the embodiment of the invention the guide member and the melt inlet (1) providing a gas injection unit 400, and by using this melt rotational flow (P (M) of the vicinity of the guide member C to form a) can. For example when the guide member may include only the first member 20, the gas injection unit 400 includes a first member 20 and the molten material between the injection unit (1), the first member 20, the melt inlet (1 in ) can be separated from the side is provided. Further, the guide member is or disposed between the first member 20 and a to and including all of the second member 30, the gas injection unit 400 includes a first member 20 and the melt inlet (1), the between the first member 20 and second member 30, it is possible to be installed away from the second member 30 toward the first member 20.
[82]
That is, in the vicinity of the first member 20 and the melt inlet (1) or between the first member providing the 20 and the second member 30, the gas injection unit 400, between, the first member 20 and injecting a gas (g), the strong rotational flow (P in the upward flow and the melt (M), C can be formed). Thus, 30㎛ below to fine inclusions can be separated injury, sikimyeo repeatedly rotating the melt (M) in the vicinity of the first member 20 in the container 10 can be sufficiently stay. In particular, the rotational flow (P C can increase the number of revolutions of), can greatly enhance the frequency of contact with the gaseous inclusions.
[83]
In this case, the inclusions (s') is a rotational flow (P of the melt (M) incorporated into the melt (M) C is a long time of stay and separation portion along) in the vicinity of the first member (20), the melt (M) provided in the upper surface it can be smoothly removed trapped in the slag (S). In addition, the inclusion (s') incorporated into the melt (M) is a rotational flow (P of the melt (M) C along), and a long time of stay in the vicinity of the first member 20, as in the case of Figure 4, the gas while several frequently in contact with the bubble of gas (g) injected into the melt (M) via the injection unit 400, it is collected in the interface between the air bubbles can be removed more effectively.
[84]
On the other hand, the guide member, the first member contains only 20, the gas injection unit 400 may be installed in close proximity to the first member (20) between the first member 20 and the hole 14. At this time, the melt inlet (1), the holes 14 by the rising flow of the gas (g) to be injected from the gas injecting section 400 is a wall unit to be described later of the chamber (500) in a direction toward, the It is induced to flow to the upper portion of the first member (20). And gas by the injection unit 400, gas (g) is injected in, the are a first member 20, the melt (M) pressure on both sides of the area of the center in the longitudinal direction (Y) to vary, the melt inlet (1 ) to hole 14 in a direction toward, the flow passing through the lower surface of the first member 20 is formed. From this, a rotational flow of the first member 20 to the melt (M) surrounding the vicinity of the rotating repeatedly a plurality of times can be formed. Rotational flow in this case is that the rotating direction is, for example, rotational flow in Fig. 3 (P C may be different from the rotation direction).
[85]
Gas injection part 400 is spaced apart from the side of the melt inlet (1) in the guide member, may be installed on the bottom part 13. For example, gas injection unit 400 may be installed on the first member 20, the melt inlet (1) and the second member 30, a bottom part 13 spaced from the side. A gas injection unit 400 is provided with a plurality may be located on both sides of the around the melt inlet (1) the longitudinal direction (Y). A gas injection unit 400 may for example be subject to a composition and method of the porous plug (Porous plug) or the like that is provided with the ladle furnace (furnace Ladle).
[86]
A gas injection unit 400, the transverse direction (X) extends, and protrudes to the upper surface of the bottom part 13, a plurality of slits that if than the height of the first member 20 is formed on the upper surface of the lower block, block , is through the bottom portion 13 and the block of the container 10 in sequence attached to the gas injection pipe 410, a gas inlet tube 410 communicating with the slit in the block upper surface control valve for controlling the opening and closing system It may include 420. At this time, the control valve 420 may be a gas (g) the melt (M) to control the opening and closing manner so that continuous infusion or intermittent injection.
[87]
Block can be formed of a dense refractory quality, it may be formed in various shapes having a top surface having a predetermined area. The slit extends into the interior of the block, it is possible to penetrate the upper surface of the block in the direction of height. The slit is gas (g) therein to allow the flow, or formed into a hollow tube, or may be formed of a porous refractory material. Into the container 10 through the slit can be injected with a gas (g) a fine bubble state.
[88]
Block the gas injection unit 400 may be relatively close to the location to the first member (20) than the melt inlet (1). At this time, at least one of a number of blocks and the melt flow direction and the rotation by the first member 20 is a gas (g) that controls the spacing (W1) is injected into the interior of the container 10 from the gas injecting section 400 of the a it can be controlled.
[89]
For example, the shorter the distance (W1) of the block relative to the first member 20, a melt flow direction of the gas (g) can be formed in a direction that the rising steeply along the first member (20). In the case of the opposite, the melt flow direction may be formed in a direction to relatively gradually rising along the first member (20).
[90]
Further, the distance (W1) is short more, venturi (Venturi), the first member 20 and the rotational flow (P of the second member 30, the melt (M) between the by the effect of C is a gas injection) unit ( seamlessly recover toward 400), rotational flow (P C may increase the rotational speed of a). While further the distance (W1), the first member 20 and second member 30 is reduced the number of times the degree of the melt (M) between the rotational flow (P C may relatively decrease the number of revolutions of) have.
[91]
As described above, a gas injection unit 400 may cause the Venturi effect, as located in the vicinity of the first member (20). In other words, the first member 20 to the melt (M) in the vicinity by the installation position of the gas injection unit 400 and rotates a plurality of times repeatedly consistent, strong rotational flow (P C , as to form a), or less size 3㎛ of fine inclusions in the separated portion to the upper surface of the melt (M), or it may be collected by the bubbles of gas (g).
[92]
On the other hand, there may be formed a predetermined or a bath surface (N) of the size to the gas injection unit 400 or the first member (20). This is because the melt (M) by a fast upward flow of the gas injection unit 400 and the second between the first member 20 to the melt (M) by a gas (g) is injected into the melt (M) through the gas injection unit 400 the slag (S) formed on the upper surface of the smoking because pushed. As the case or the melt (M) is in contact with the screen property to the atmosphere via the bath surface (N) has a degree of purity may be degraded.
[93]
Therefore, as in the embodiment of the invention, providing a chamber (500) on the guide member and the gas injecting part 400. When the upper surface of the melt (M) or the bath surface (N) is formed, and cover the vicinity of (C) of the bath surface (N) to the chamber (500) to form a vacuum atmosphere or an inert atmosphere, and the melt (M) is queued to the It can effectively prevent contact by oxidation. Such as and bath surface (N) are protected from the outside air by a chamber unit 500, or to be sufficiently strong injection of gas (g), regardless of the bath surface (N) formed of a gas injecting section 400, a sufficiently strong times current (P C can be achieved in the formation of).
[94]
Further, it immersed the lower part of the chamber (500) in the melt (M), with the immersed portion of the first member 20 from the melt inlet (1) into holes (14) the direction of the chamber part (500) of the melt is possible (M) by overflowing the upper guided toward the lower portion of the first member 20. Thus, once a current (P to the vicinity of the first member (20), C a) to form a stable manner. In other words, the chamber portion 500 with the protection of the bath surface, or (N) times current (P C helping the formation of a), rotational flow (P C serves to increase the number of revolutions of). Thus, the inclusion removal efficiency is improved by a chamber unit 500, the cleanliness of the melt can be further enhanced.
[95]
Chamber 500 may extend in the width direction (X) may be installed on the upper portion of the interior is opened to the lower side, the guide member and the gas injecting section to face a 400 vessel 10. At this time, the chamber 500 may be respectively provided in the spaced apart position to be provided with a plurality of the melt inlet (1) the center in the longitudinal direction (Y) a.
[96]
On the lower face of the chamber unit 500, the read unit 510, and extend in the width direction and spaced apart on either side of the longitudinal direction around the first member 20, the lead parts 510 extending in the transverse direction (X) respectively mounted and wall portions that are in contact or spaced apart in the side walls the longitudinal direction of the container 10, extending in the longitudinal direction (Y) are respectively mounted to the transverse direction (X) side edge of the lid part (510) connecting the wall portions may include a flange portion 511, the wall portions and the flange portion 511 are immersed in the melt (M) and has a bath surface (N) to be hermetically protected the chamber (500).
[97]
In this case, for example, the wall portion and the flange portions 511 to be immersed in the melt (M) may be at least partly protected by refractory. Further, the when of the first member flange portion flange portion 511, in order to avoid a collision or interference of 511 to 20 when the wall portions and the first member (20, when immersed in the melt (M) ) it may be higher in height than the upper surface of the.
[98]
Lead 510 is a member of plate shape and may be formed or the bath surface (N) formed on the top of the melt (M) as well as possible covers the area. Lid part 510 can be installed height determined to be a predetermined height away from the upper surface of the first member 20, the upper surface or the vessel 10 the molten material (M) injected into the interior of the. Wall portions may include a first wall 520, second wall 530. The first wall portion 520 may be positioned to be spaced apart toward the melt inlet (1) in the gas injection unit 400, a second wall portion 530 may be spaced apart on the upper side of the second member 30 can.
[99]
The first wall portion 520 may be, for example, a vertical wall extending in the transverse direction (X). The first wall portion 520 when the can be extend in the lower side to the upper surface than is formed with a height higher, dipping as high by the melt (M) injected into the interior of the container 10 of the first member 20 . The second wall portion 530 may be, for example, a vertical wall extending in the transverse direction (X). The second wall portion 530 is formed when a lower height than the upper surface of the first member 20, and may extend to the lower side to the immersion as high by the melt (M). The second wall portion 530 of the melt flowing toward the second member 30, the melt (M) of the holes 14 to adjust the spacing distance (d1), overflowing the top of the first member 20 to the flow rate (Q1), and can determine the flow rate (Q2) of the melt flowing toward the gas injection unit 400, respectively, may each control a relative size or an absolute size of the value.
[100]
For example, the second member (30) spacing distance (d1) is shorter more, holes 14 flows to rotational flow (P than the flow rate of the melt (Q1) toward the gas injection part 400 to flow toward to C to form a) It may increase the flow rate (Q2) of the melt is used. On the other hand, the second member (30) spacing distance (d1) is farther, the melt flow rate (Q1) is fluidized by rotational flow (P toward the gas injection part 400 to flow toward the holes 14 of the C in the form of a) may be greater than the melt flow rate (Q2) is used.
[101]
At this time, these flow rate times current (P C is closely related also to the number of rotations of). I.e. flow to rotational flow (P toward the gas injection portion (400) C The greater the flow rate (Q2) of the melt used for the formation of) times current (P C to facilitate the formation of a), it is possible to increase the number of rotation.
[102]
That is, the second member 30 of the second wall section 530 and the guiding member of the chamber part 500 times current (P C is essential arrangement for determining the number of revolutions of), by a distance (d1) between them rotational flow (P C can determine the number of revolutions of). Therefore, it is recommended first member 20 to face the second wall 530 at a predetermined position spaced apart toward the hole 14 in the vertical direction at least in the second member 30 is constructed.
[103]
On the other hand, the second wall portion 530 is provided on the side opposite to the gas injection unit 400 around the first member (20). At this time, the second has a first inclined surface on a side facing the first member (20) of the wall section 530 may be provided. Inclined surface may be formed to be inclined upward from bottom to top of the first toward the second member 30 in the first member 20, a second wall portion (530). Slope is the melt inlet (1) in the second member 30, the direction toward the first member sikimyeo smoothly lower the melt (M) of an overflowing 20 can be guided toward the lower surface of the first member 20 .
[104]
Chamber unit 500 and the negative pressure by a gas (g) flowing into the inside of the chamber unit 500 through the bath surface (N) is formed may be formed of an inert atmosphere. Of course, there supply pipe (560) and an exhaust pipe 570, the chamber portion 500 so as to enable direct control of the interior atmosphere of the chamber unit 500 may be mounted respectively.
[105]
Supply pipe 560 is formed so as to enable the gas supply and can be communicated with the inside through the example the lid part 510 a side of the chamber (500). An exhaust pipe 570 is formed to allow the exhaust gas and can communicate with the inside through the example the lid part 510 of the other chamber (500). The inlet portion of the supply pipe 560 may be connected to the gas source (not shown), it is possible to receive a supply of inert gas to form an inert atmosphere in the interior of the chamber (500). The interior of the exhaust pipe 570, the inlet portion exhaust pump (not shown) and the vacuum pump chamber (500) may be connected by using them (not shown) it can be formed in an inert atmosphere or a vacuum atmosphere.
[106]
On the other hand, the melt processing apparatus according to an embodiment of the present invention, the chamber (500) along the upper surface height of the melt (M) and the lifting can support the chamber portion 500, which is injected into the interior of the vessel 10 It may include a first operating unit 540 can adjust the height, and the chamber portion 500 for slidably supporting and length according to or bath surface (N) generated position of the melt to be injected into the interior of the vessel 10 2 may comprise an operation unit 550 for adjusting the position of the chamber (500) in a direction (Y). The operating part may be formed of a structure, such as for example hydraulic cylinders, which are applied to the manipulator of the continuous casting plant, and does not limit it in particular.
[107]
The first operation part 540 may be formed to be stretchable and contractible and attached to the upper surface central portion of the lid part 510, for example by using a hydraulic pressure or the like, the height direction (Z). A second operation part 550 may be formed to be stretchable and contractible and attached to the upper, for example by using a hydraulic pressure or the like, the longitudinal direction (Y) of the first operating unit 540. Second moving in the longitudinal direction (Y) by the operation unit 550 may be delivered to the chamber unit 500 through the first operating portion 540. The
[108]
On the other hand, the melt processing apparatus according to an embodiment of the present invention, the first member 20, the second gas injection unit (not shown) provided in the bottom part 13 are spaced apart on opposite sides of the gas injection unit 400 from there can be further included. For example, gas injection part 400 is to be provided between the first member 20 when spaced from the side of the melt inlet (1) installed in the second gas injection unit comprises: a first member 20 and second member 30 number, and a gas injection unit 400 are spaced toward the first member 20 and when disposed between the second member 30, the second gas injection unit comprises: a first member (20), the melt inlet (1) in the installation It can be. The second configuration and an operation method is a gas injection portion may be the same as the configuration and operation method of the gas injection unit 400, be described in detail will be omitted.
[109]
The injection of gas (g) in a melt (M) from the side opposite to the gas injection unit 400, with parts of two gas injection around the first member 20, and can directly control the flow, in the case thereof, once current (P C a) is more possible precisely controlled.
[110]
Gate 60 may be respectively mounted on the lower surface of the container 10 so that the vertical alignment is formed so as to open and close the hole 14, hole 14. Gate 60 may include a slide gate in continuous casting plant, the slide gate can control the discharge of the melt (M) by adjusting the opening of the hole 14. Gate 60 may be a nozzle 70 is mounted.
[111]
Nozzle 70 can be mounted on the lower face of the gate 60 as a refractory nozzle of the hollow extending in the height direction (Z), so as to communicate with the hole 14. The melt discharged from the hole (14), (M) is introduced into the nozzle 70 through the gate 60, it can be supplied to the mold (not shown) provided to surround the lower portion of the nozzle 70. For example, nozzle 70 may include an immersion nozzle (Submerged Entry Nozzle) of the continuous casting plant.
[112]
Mold (Mold) may be a hollow rectangular block or forward, the interior may be open perpendicularly to the upper and lower sides. Melt (M) is supplied to the mold is passed through the slab (Slab) to 1 (not shown) cooling zone of the car can be solidified, the curved type or vertical bending type provided on the lower side of the mold, and the semi-finished product is molded, and cooling the secondary It can be continuously cast into slabs.
[113]
In the operation of the melt processing device formed as described above, and then by the transport container the melt is transported, the melt inlet (1) the melt (M) into the container 10 through the coupling to the transport container is injected. At this time, the injected melt to form a flow toward the guide member along the bottom part 13, an upward flow is formed by a gas (g) injecting a gas injection unit 400 installed at a position preceding to the guide member. Some of the upward flow is turning toward the melt inlet (1), most of the flow is switched to the lower budithimyeo the second wall 530 of the chamber to flood the first member (20) unit 500. Some of the flow toward the bottom of the second member 30, only leaving the overflowing of the upper exit side holes 14, the remainder falling to a venturi effect in the vicinity of the gas injection unit 400 and then reaches the bottom part 13 by flooding with the lower surface of the first member 20 once the current (P C to form). Is by using a rotational flow can be a melt (M) of removing inclusions (s') it is gas (g) and the number of times contact. Chamber unit 500 during this process, or wrapped around the bath surface (N) forming an inert atmosphere or vacuum atmosphere, and thereby, it is possible to prevent contamination of the melt (M) by the atmosphere.
[114]
It will now be described in detail with a melt processing method according to an embodiment of the present invention. Melt processing method according to an embodiment of the invention, as applicable to the above-described melt processing apparatus a melt processing method according to an embodiment of the present invention, the interior is opened to the upper side a hole formed in the bottom portion the melt injected in addition to the upper provided and the hole and the melt process for preparing a container provided with a guide member between the injection unit, the process of injecting the molten material into the container, the process of flooding the melt to the upper portion of the guide member, the gas derived through infusion section members and melt inlet injecting a gas into the interior of the vessel between and includes the step of forming a rotational flow of the melt. At this time, the melt (M) includes a molten steel and gas (g) may include an inert gas.
[115]
First, the interior is opened to the upper side, and a hole 14 formed in the bottom part 13, is provided with a melt inlet (1) on top, induction between the hole 14 and the melt inlet (1) member prepare a provided vessel (10). At this time, the guide member includes a first member 20 attached to the melt inlet (1) side walls (12) longitudinally in spaced side holes 14, and spaced apart from the bottom portion 14 the container 10, and the spaced side holes 14 in the first member 20, in contact with the bottom part 13 may include a second member 30 which is mounted on the side walls 12, the longitudinal direction of the vessel 10 .
[116]
Then, mounting the transport container (not shown) to the melt inlet (1), and the melt is injected into the melt (M) in the opening by the injection part (1) carrying the container in the interior of the vessel 10.
[117]
Then, the continuous embodiment the injection of the melt (M), and by increasing the level of the melt (M) thereby flooding the melt (M) to the upper portion of the guide member. At this time, it is possible to flow toward the first member 20 and the hole 14 to the melt flow (M) to the upper portion of second member 30. For example melt water melt (M) to flow to the injection part (1) toward the first member 20 to flow toward the second member 30 by overflowing the top and bottom surfaces of the first member 20, second member ( overflowing the top face 30) to flow toward the holes 14.
[118]
Then, the injection of gas into the vessel 10 through the gas between the injection unit 400, the guide member and the molten material injection portion 400, and rotational flow of the melt (M) (P C to form). In this case, the injection of gas (g) into the container (10) between the first member 10 and the melt inlet 400 through the gas injection unit 400 and the rotational flow of the molten material (P C to form a) have. Or, injecting a gas (g) into the container 10 between the second member 30 and the first member 20 through a gas injection unit 400 and the rotational flow of the molten material (P C to form a) have.
[119]
Melt (M) times current (P in C or bath surface occurrence of the melt (M) by with the process of forming), a gas (g) injected by using a chamber (500) into the interior of the vessel 10 where the wrapping to form a vacuum atmosphere or an inert atmosphere in the zone.
[120]
This process, or it can be carried gamyeo by moving the chamber (500) by for example the longitudinal direction (Y) along the bath surface position, for example, open along the top surface level change of the melt (M) due to reasons such as the continuous casting chamber ( 500) a can be carried out for example sikimyeo move in the height direction (Z). Thus, the immersion depth of the chamber part 500 may be constant, the immersion position of the chamber (500) and wraps around the bath surface (N) can be fixed to the position.
[121]
Further, after this procedure it is to align the chamber (500) on or bath surface (N), and the immersion of the lower part of the chamber (500) to the melt (M) and wrapped in the vicinity of the bath surface (N), formed in an inert atmosphere a or the bath surface (N) chamber (500) direct injection or chamber (500) to separate the inert gas in the interior of the use of gas (g) flowing into the inside, or chamber 500 of the via to It can be carried out in a manner such as to evacuate the inside to form a vacuum atmosphere.
[122]
In this case, the process of forming the vacuum atmosphere or an inert atmosphere or in the process of the bath surface to form a rotational flow can be carried out sequentially in any order, and can be performed at the same time, the two processes. Thus, the melt (M) a strong rotational flow (P in C ) formed by the inclusions (s') for removing and together, rotational flow (P C ) and the melt (M) is contaminated with the bath surface (N) generated by the that can be prevented.
[123]
On the other hand, rotational flow (P C in the formation of), the guide member, for example by a different gas injection position of the gas injection unit 400 for the first member 20, a rotational flow (P C may flow direction with the rotation of) one can control the at least one. For example, by by adjusting the spacing (W1) of the gas injection unit 400 with respect to the first member 20, different from the gas injection location of the gas injection unit 400 with respect to the first member 20, the first member 20 can be different from the action range and the size of bottoms venturi (venturi) effect. From this rotational flow (P C can be adjusted to be the flow direction and the rotation of). In this case, the first member The smaller the spacing (W1) of the gas injection unit 400 for the 20 rotational flow (P C , and the flow direction) may be formed vertically along the first member 20, the number of revolutions can be increased.
[124]
Further, the rotational flow (P C by adjusting the height of) the second wall portion 530 as at the time of formation, methods of controlling the immersion height of the chamber (500) for the melt (M) of the second member (30 ) it is possible to adjust the spacing distance (d1) of the second wall 530 of the. From this, by overflowing the top of the guide member the flow rate (Q1) and a guide member of the melt flowing toward the hole 14 by overflowing the top of the side of the gas injection unit 400, the flow and the rotational flow (P C is recovered in) may each control the flow rate (Q2) of the melt.
[125]
Thus, once a current (P C contact of the base (g) to) rotation speed by controllably induced to rotate a plurality of times the melt (M) in the vicinity of the member with Sikkim long time of stay, the guide member close to the melt (M) of It can significantly increase the frequency.
[126]
Further, the rotational flow (P C ) when the gas by controlling the injection of gas (g) by the injection unit 400 by at least one method of a continuous mode and intermittent manner, the rotational flow around the guide member to form the ( P C a) flow to the desired flow can be variously controlled. That is, continuously injecting a gas (g) during the processing of the melt (M) and the rotational flow (P C may be constantly controlled for the intensity or the like can, and rotation of) the time. Or, align or irregularly intermittent injection by rotational flow (P gas (g) at a predetermined cycle during the processing of the melt (M) C changes the strength and rotational frequency flow characteristics of such) over time, and for example, pulsed- there have to be controlled.
[127]
Such induced rotational flow (P formed a gas (g) at various locations around the member in the vicinity of the guide member by injection in a variety of ways C flow characteristics, for example the flow direction and the rotation the desired flow characteristics such as the number of) can be variously controlled by the have.
[128]
On the other hand, rotational flow (P C during the formation of a) the second injection of gas into the container between the gas injection unit injecting section 400, a base via a (not shown) and the guide member and the flow direction with the rotation of the rotational flow underwater may control at least one.
[129]
For example through a gas inlet 400, a first member 20 and the melt injected into a gas (g) into the interior of the vessel 10 between the injection unit 400, and the gas injected in the first member 20, part ( 400) spaced from the opposite side through the second gas injection unit (not shown) provided in the bottom part 13 of the second member 30 and the first member (20) gas into the interior of the container 10 between the injection and rotational flow of the molten material (P C can be controlled).
[130]
At this time, the second and at least one different control each other in a gas injection amount and the injection of the gas injection parts of the gas injection amount and injection of at least one gas injection of the part 400, the longitudinal direction around the first member (20), (Y on either side of) it may alternatively control the injection amount and the injection of gas (g). A first member 20, the vicinity of a useful water (M) flowing from it to the desired flow can be variously controlled.
[131]
To remove inclusions from the melt (M) supplied into the vessel 10 while performing the process of effectively discharging the melt (M) to the outlet (14), cast from this outlet 14, the mold (not shown) provided under the It can be molded into (not shown). Thus, it is possible to improve the quality of the main convenience being cast, it is possible to prevent the physical properties of the product surface through defects.
[132]
5 is a diagram showing the inclusions removing process and result in the embodiment; In this case, the diagram (a) of 5 is a photographic view showing an exemplary characteristic experiment for injection and solidification of argon gas to the molten steel, and by photographing the cross-sectional state river coagulation is completed by an electron microscope. (B) of Figure 5 is a photographic view showing an enlarged air bubble surrounding the solidified steel then carried out of characteristic experiment described above with an electron microscope. Of Figure 5 (c) is a view to the composition of the surrounding air bubbles in the solidified after the practice of the characteristics described above experimental steel detected through the electron microscope shown in the graph. At this time, looking at the Figure (c) of 5, it shows the X-ray intensity of energy (keV) spectrum that is the horizontal axis is for example detected by an electron microscope. With reference to Figure 5, a description process and the result of the characteristic tests to show that it is possible to effectively remove collected as a fine inclusions by injecting argon gas into the molten steel.
[133]
First, the order to perform the characteristic absorption of the inclusions in the molten steel removed by an argon gas test, provide a molten steel and the solidification put bread blowing argon gas to the molten steel. It was observed when the molten steel solidifies the solidified lecture section with an electron microscope, check the bubble and inclusions in the peripheral part is formed in the solidified steel by injecting an argon gas, and analyzing the components. The process and its results are placed in (a), (b) and (c) of FIG.
[134]
These properties result, as shown in (a) of Figure 5, when the solidified steel is a bubble formed by argon gas, of less size 30㎛ around the fine air bubbles as shown in Figure 5 (b) inclusion this can be confirmed that a significant amount is present, as in the component analysis results thereof, Fig. 5 (c), Al 2 O 3 was found in the inclusion. Which, by using the argon gas bubbles shows that it is possible to effectively remove fine inclusions of molten steel.
[135]
Thus, when injecting bubbles of argon gas into the molten steel, there is the inclusions adhering to the surface, which is due to the inclusions being deposited on the properties of low surface tension. That is, since the surface tension of the bubbles due to the argon gas relatively low compared to the interfacial tension of the molten steel, the inclusions can be trapped by the interface between the bubbles of argon gas.
[136]
In this case, the embodiment of the present invention, rotational flow (P in a predetermined region in the molten steel to be used for inclusion trapping release properties of the molten steel's inclusions to trap removed, the injection of argon gas by argon gas C of the same molten steel by forming a) sikimyeo several rotation may be contacted repeatedly with argon gas and a high frequency.
[137]
Thus, more effective Al 2 O3 and SiO 2 is the fine inclusions with a component, such as to remove trapped in the molten steel. At this time, the bubbles of argon gas trapped in the interface between the inclusions out to increase the bath surface for exit out of the molten steel, the inclusions can be removed by adsorption on the slag layer.
[138]
As described above, the embodiment of the present invention it is possible to smoothly remove trapped inclusions from the molten steel, if because it is possible for the cleanness is secured molten steel for inclusions injected into the mold, and apply them to the continuous casting process, in the mold to prevent the physical properties and defective through can be reduced nozzle clogging due to the inclusions. A result of this, it is possible to improve the quality of the cast steel in the continuous casting process, it is possible to increase the reliability and productivity of the process.
[139]
Figure 6 is a diagram showing the results of a schematic model a structure of the melt processing device to the flow analysis of the melt in accordance with an embodiment of the invention, Figure 7 is the melt flow of the melt processing apparatus according to an embodiment of the present invention is a view showing an analysis result. First, a schematic model a structure as shown in Figure 6 the interior of the melt processing device to a numerical analysis using a computational fluid dynamics of the melt processing apparatus.
[140]
At this time, "and the portion is melt injected, the reference numeral 10, reference numeral 1 in the figure is modeled the container, the reference numeral 20 'is the first member. In addition, the reference numeral 30 'is a second member, and the reference numeral 400 "is a gas injection unit, reference numeral 500' is a chamber. And reference numeral 70 is a nozzle. Further, reference numerals P 1 and the flow in the vicinity of the melt inlet, P 2 is the melt flow in the vicinity of the nozzles, P ' C is the melt flow in the vicinity of the first member, V is a forming region of the Venturi effect.
[141]
Then, the computational fluid dynamics modeling the results by entering the predetermined analysis condition; using (CFD Computational Fluid Dynamics) analysis and figures it. The analysis results are shown graphically in FIG.
[142]
Look with Figure 6 and Figure 7, the numerical analysis of the results, the melt flow direction and the 'from the first member (20 melt inlet (1), generating side), the gas lift in the gas injection section 400' the impact material according to the first member (20 ') is the melt flow increases. Some of the increased melt flow, the melt "Back side, most of the melt is increased the first member (20 injection unit 1 'is rotated toward the third member (30') in). A third member (30 '), the melt by the flow towards the chamber (500' toward the bottom and then hit the wall portion of), at this time, some of which exits the side of the second member, beyond the nozzle (70 30 '), the rest are ongoing with the bottom wall portion. Melt the process proceeds to the bottom wall unit is, the first member (20, toward the gas injection part 400 'along the bottom of a (venturi (Venturi) to the container 10) because of the effects produced on the gas injection unit 400' ) by the movement of the lower crossed, it is possible to confirm that the rotational flow around the first member (20 ') formed.
[143]
Chamber unit 500 according to an embodiment of the invention the shape of the first wall 520 and second wall portion 530 may be variously modified. With reference to Fig. 8, the first wall parts and second wall portions of the shape of chamber 500 in accordance with the modified example of the present invention will be described in detail.
[144]
8 is a diagram showing a part of the chamber part of the melt processing apparatus according to the embodiment and modified examples of the present invention. At this time, a partial view (a) of the 8 is also a chamber parts shown in accordance with an embodiment of the invention parts, (b) to (i) a chamber portion shown according to a first modification to the eighth modification of the order degrees.
[145]
On the other hand, 'b' to 'i' in the reference numerals shown in the drawings was used to distinguish it from the structure unit carried part configuration for each variant. In example 8, the reference numeral 510b to 510i was used to distinguish it from a lid part embodiment the lead section (510) for each modified examples. In addition, reference numeral 520b to 520i was used to separate a first wall for each variant examples and the embodiment a first wall part 520, reference numeral 530b to 530i are the embodiment a second wall for each variant examples the was used to separate the two walls 530.
[146]
In contrast to FIG. (A) and (b) to (i) of 8, in the modified example of the present invention there is a chamber portion the first wall and the second wall-shaped portion may vary. A first wall portion perpendicular cross-section of Figure 8 (b), (c), (f), (g), (h) and or a rectangular shape as shown in (i), in Figure 8 (d) and (e) and as a right-angled triangle can be a shape, at this time, when the right angle triangle shape, or can be directed toward the outside of the inner chamber surface the portion corresponding to the hypotenuse.
[147]
In addition, the second wall portion 530 has a first wall each upwardly inclined surface 531, a downward inclined surface (531 '), a vertical surface 532, surface 533 on the viewing surface and the other surface opposite thereto facing parts of the concave groove ( 534) has at least one can be formed of. Specific shape thereof are as respectively shown in (b) to (i) of Fig.
[148]
Thus the variant of the invention the first and the shape of the wall portion 520 and the second wall portions 530 different from some or all of a wide range of adjustment of the flow properties of the melt through each of the wall parts. Thus, it is possible variously control the flow of the melt is formed in the chamber (500) to a desired flow.
[149]
Figure 9 is a view showing the processing result of the melt according to the comparative example of the schematic view, and the FIG. 10 of the melt processing apparatus according to a comparative example of the present invention invention, a conventional melt processing apparatus according to a comparative example of the invention after used to perform the operation is a photograph showing the result.
[150]
Conventional melt processing apparatus according to a comparative example of the present invention, the molten steel (M ') and the melt inlet (1) which is located in the center of the slag (S) is the turn-dish 81, tundish 81, ADD, provided with a melt inlet (10) provided spaced above the dam 82, and the upper weir 82, the lower dams are installed spaced toward the tapped opening (84) in (83) toward the tapped opening (84) in the. In this, the melt process by using, as the inside of a figure shown by a dashed arrow, the tundish 81 is not formed in the wrap once the upper weir 82 current. After performing this operation several times by applying a continuous casting process, see the cast steel prepared therefrom, may be, verify the physical properties through a defect is formed on the surface of the cast, as shown in FIG. This is because you have not, as in the embodiment of the present invention allows to separate a fine portion or eliminate inclusions trapped in the interior of the tundish 81, for example, the rotational flow and gas injection made.
[151]
For example in the casting of molten metal, such as a continuous casting process, the cleanliness of the molten metal is an important factor in determining the quality of the cast product. During the continuous casting process, aluminum or silicon is in the molten steel to react with oxygen, but the removal of most of the inclusions very small inclusions used in the process of deoxidation of molten steel (M ') are so retained in the molten steel. Such inclusions are, for instance, as well as the occurrence of clogging of the immersion nozzle of the tundish 81 in a continuous casting process to prevent the molten steel injected into a mold, is mixed in the coagulation process, the cast steel, shown in Figure 10, the inclusions themselves Figure cause defects to. These inclusions may be removed in various ways, but for the inclusion of less than 30 ㎛ the upper weir 82 and lower dam 83 limits the portion separated by the molten steel (M ') flow.
[152]
On the other hand, according to the embodiment of the present invention thereby, for example by injection of argon gas into the melt, as a way to maximize the efficiency of removal of inclusions to form a rotational flow. In this case, to adjust the injection position of the argon gas to maximize the formation of a rotational flow and, provided on the first member for example, the weir portions and the chamber to prepare for the bath surface occurs caused by the rotation, and an argon gas injection. Therefore, while strong times with the current formed in the melt sikimyeo repeated contact with the argon gas to effectively remove the inclusions, it is possible to prevent contamination of the melt to form an inert atmosphere or a bath surface due to the strong rotational flow and argon gas injection.
[153]
The embodiment of the invention is for the description of the invention, it should be noted that not of limitation of the invention. Further, the configuration and method shown in the embodiments of the invention it should be noted that will be modified in a variety of different types are applied or cross-linked to each other, can see this modification in the scope of the invention. After all, the present invention will be implemented within the scope of the claims and its equivalent technical idea, in many different forms, practitioners of the art to which the present invention that has various embodiments are possible within the scope of technical idea of ​​the present invention it will be appreciated.

Claims
[Claim 1]
Container interior is opened to the upper side, is provided on an upper portion the melt injection, the hole formed on at least one side of the bottom; The guide member is installed spaced apart from the side of the hole from the melt inlet; And a gas injection unit that is spaced toward the molten material injection portion, provided on the bottom portion in the guide member, the melt treatment apparatus comprising a.
[Claim 2]
The method according to claim 1, wherein the guide member includes a first member from the melt inlet is spaced toward the hall is installed spaced apart from the floor; melt processing apparatus including a.
[Claim 3]
The method according to claim 2, wherein the guide member, the second member from the first member being spaced from the side of the hole, which is installed in contact with the floor; melt processing apparatus including a.
[Claim 4]
The method according to claim 3, wherein the gas injection portion, in the first member or spaced apart from the side of the melt inlet or the melt processing apparatus in the second member, which is installed spaced apart from the side of the first member.
[Claim 5]
A method according to any one of claims 1 to 4, and extends and the interior open to the lower side in the width direction, the guide member and the facing parts of the gas injection chamber, which is installed at an upper portion of the vessel; melt processing apparatus including a.
[Claim 6]
The method according to claim 5, wherein the guide member, the melt processing apparatus and each of the gas inlet, the chamber and the hole in the center is provided with a plurality of the melt injection parts located on either side of the longitudinal direction.
[Claim 7]
A method according to any one of claim 2 to claim 4, wherein the gas injection section, extends in the width direction, is projected to the upper surface of the bottom portion, when the melt processing apparatus is lower than the height of the first member.
[Claim 8]
A method according to any one of claim 2 to claim 4, wherein the gas injection unit, the melt processing device to a position relatively close to the first member than the melt inlet.
[Claim 9]
A method according to any one of claims 1 to 4, wherein the gas injection unit is installed on the floor, the blocks in which the slits are formed in the upper surface; Gas inlet tube communicating with the slit; And a control valve that is mounted to the gas inlet tube, controls the opening and closing mode of the gas inlet tube; melt processing apparatus including a.
[Claim 10]
The method according to claim 5, wherein said chamber portion, the lid part extending in the transverse direction; Extend in the width direction, the first member and spaced apart on either side of the center in the longitudinal direction are respectively mounted on a lower surface of the lid portion, the wall portions that are in contact or spaced apart in the length direction of the side walls of the container; The length extending in a direction, are respectively attached to the side edges of the lead portions in the width direction, the flange portion to connect the wall portions; melt processing apparatus comprising a.
[Claim 11]
The method according to claim 10, wherein said wall portions, a first wall portion from the gas inlet which is located to be spaced apart toward the molten material injection portion; Melt processing apparatus including; and a second wall portion which is located spaced from the upper side of the second member.
[Claim 12]
The method according to claim 11, wherein the first wall section, when the the first is formed with a height greater than the top surface of the first member high, the melt processing apparatus by immersing the melt injected into the interior of the container.
[Claim 13]
The method according to claim 11, wherein the second wall portion, if the said first low height is formed in the upper surface of the first member, the melt processing apparatus by immersing the melt injected into the interior of the container.
[Claim 14]
The method according to claim 11, wherein the second wall portion, the melt processing device of said first inclined wall to a surface facing parts of the vertical plane, at least one of a curved surface and a concave groove is formed.
[Claim 15]
The method according to claim 5, the melt including at least either one of the exhaust pipe, which communicates the supply pipe, and the gas formed to be supplied to a gas, and the through parts of the chamber communicating with the interior therein and is formed to allow the exhaust through parts of the chamber processor.
[Claim 16]
The method according to claim 5, wherein the chamber portion lift rotatably supported and can be the slide first operating unit, and parts of the chamber to adjust the height of the chamber portion along the upper surface height of the molten material injected into the interior of the vessel to the support and of the container longitudinally along the bath surface and the generation position of the injected melt into the melt processing device comprises at least any one of the second operating unit for controlling the position of the chamber portion.
[Claim 17]
The method according to claim 4, being spaced from the first member to the side opposite to the gas injection section, a gas injection part 2 is installed on the floor; melt processing apparatus further comprising: a.
[Claim 18]
A method according to any one of claims 1 to 4, wherein the injection unit melt, the melt processing device of molten steel is formed to enable passage, detachably mounted on the ladle of a continuous casting plant.
[Claim 19]
A method according to any one of claims 1 to 4, the melt processing device to a gas to be injected into the interior of the container comprises an inert gas through the gas injection parts.
[Claim 20]
The process of the inside is opened to the upper side, a hole is formed in the bottom portion, additional melt injection provided at the top and preparation container provided with a guide member between the hole and the melt inlet; The process of injecting the molten material in the interior of the vessel; The process of flooding the melt to the upper portion of the guide member; Melt processing methods including; gas through an injection, injecting the gas into the container between the guide member and the melt inlet and the process for forming a rotational flow of the melt.
[Claim 21]
The method according to claim 20, with the chamber portions, the process of forming the vacuum atmosphere or an inert atmosphere in the area surrounding the bath surface and the generation position of the melt by the gas injected into the interior of the vessel; melt processing method comprising a.
[Claim 22]
The method according to claim 20, the process of forming the rotational flow is, by controlling the gas injection parts of the gas injection position relative to the guide member, the process of controlling at least one of said number of times the flow direction with the rotation of the electric current; including melt-processing method.
[Claim 23]
The method according to claim 20, comprising the steps of forming the rotational flow, the process for controlling the gas injection by the gas injecting section to the at least one method of a continuous mode and intermittent mode; melt processing method comprising a.
[Claim 24]
The method according to claim 21, the top of the rotor is the process of forming a current, by adjusting the immersion height of the chamber portion for the molten material, the flow rate of molten material to flow toward the holes to overflow the upper portion of the guide member and the guide member and a flood step of respectively controlling the flow rate of the melt flowing toward the gas injection unit; melt processing method comprising a.
[Claim 25]
The method according to claim 20, the process of forming the rotational flow, the second through the gas injection unit, injection of gas into the container between the base injection part and the guide member, and at least one of the number of flow direction with the rotation of the rotational flow melt processing methods including; process for controlling.
[Claim 26]
A method according to any one of claims 20 to claim 25, wherein the melt is a melt processing method including the molten steel and the gas comprises an inert gas.