1]The present invention is a melt inlet, relates to a casting plant and the casting method using the same, to a melt inlet, foundry equipment and die-casting method using the same that can more specifically to improve the cast quality and productivity.
BACKGROUND
[2]Melt injection device used in the cast molding process, e.g., melt-mold flux injection device is a facility to melt a powder fed into the mold of the mold flux. Conventional molten mold flux injection system is provided on one side of the furnace and a melting furnace to the mold flux is stored molten when supplied the mold flux from the hopper, a hopper which comprises a torch for dissolving the mold flux by injecting a flame into the furnace . At this time, the furnace has to be dissolved in the molten mold flux is discharged discharge ports can be formed.
[3]
In this way by dissolving the mold flux can be supplied to the mold when it is possible to improve the suppression of temperature reduction in a molten steel in a mold, lubricating performance, reducing the cast slab to a defect.
[4]
However, if the melt-prepared mold flux in the melting furnace so as to have a characteristic component for each type of steel cast a cast steel, there arises a phenomenon of changing the composition of mold flux by the reaction between the impurity and mold flux to be contained in the steel. For example if the cast using the molten steel containing a large amount of Al, Al2O3 as the pick-up on the mold flux is the viscosity of the mold flux increases. The mold flux is operational accidents such as where the mold and the cast steel does not smoothly flows between (clotting cells) is reduced, this feature is the heat transfer between the molten steel and the mold becomes non-uniform, lubrication coagulation cell rupture occurs or cracks occur in the cast surface It is generated.
[5]
To perform this up to a single type of steel by the change in physical properties such as mold flux (charge) or more Synchro performance is a difficult problem.
[6]
On the other hand, if the Synchro playing multiple grades, each to be used to mold flux of suitable physical properties thereof when changing the type of steel. Therefore, to inject the produced mold flux into the mold the steel grade is changed so as to have a suitable physical property thereto. However, when supplying the mold flux according to the type of steel recommended, but not to mix the mold flux having different physical properties, it can not but result in a transition process characteristics onto another mold flux having different physical properties, which are mutually mixed. This transition has a problem that the mold flux is often caused by rupture of the developer can not be smoothly introduced between the mold and the solidified cell solidification cells.
Detailed Description of the Invention
SUMMARY
[7]
The present invention provides a melt inlet, foundry equipment and die-casting method using the same which can improve the casting efficiency.
[8]
The present invention provides a melt inlet, foundry equipment and die-casting method using the same which can improve the quality of the main room.
Problem solving means
[9]
Melt injection apparatus according to the embodiment of the present invention includes a raw material supply portion for supplying a source of the heterologous respectively; Mixing portion for mixing the raw material to prepare a mixture of different types of which is supplied from the material feed portion and; Melting portion is connected with the mixing unit which generates a melt by melting the mixture to be fed from the mixing section, and a discharge port is provided in which the melt is ejected; And a control unit for controlling the components of the mixture to control the raw material supply portion, a mixing portion and a molten portion operation; may include.
[10]
The raw material supply unit may comprise a second material supply for supplying a plurality of second material having a first raw material supply section and a different component for supplying a first source individually.
[11]
The first raw material supply unit, a first storage group and to store the first source; First transfer pipe for connecting the mixing portion of the first storage group; And it is provided to at least one of the first stored group and the first transfer pipe 1.01 chulgi to control the discharge amount of the first material; may include.
[12]
The second raw material supply portion, a plurality of second storage group and to store the plurality of second material, respectively; The second feed piping connecting each of the plurality of second storage group and the mixing part and; And it is provided on at least one of said second storage group and the second transfer pipe second section chulgi to control the discharge amount of the second material; may include.
[13]
The mixing unit and the mixing vessel in fluid communication with the first supply pipe and the second supply pipe; It is provided in the mixing vessel, an agitator for mixing the first material and the second material; And the third feed pipe for conveying the mixture of the first material and the second raw material melting portion; may contain.
[14]
The mixing unit wherein the mixing vessel comprises a mixing vessel which communicates the first supply pipe and the second supply pipe and can be rotated.
[15]
The molten portion, the melting furnace and having the first raw material and the melting space in which the second source is received and dissolved therein; May comprise; is provided at one side of the furnace ten won supply unit for supplying a heat source in the melting space.
[16]
The heat source supply unit may use a plasma as a heat source.
[17]
The controller may control whether or not input of the second material according to a signal input.
[18]
A casting plant according to an embodiment of the invention, the mold for the initial solidification receiving the molten steel; Melt injection device for injecting a molten mold flux to the mold, and; At least one part of the measured components of the molten mold flux that is injected, and the mold temperature of the mold; And a controller for controlling operation of the injection device so as to melt possible to change the components of the molten mold flux is injected in the mold in accordance with the measuring portion measurement result; may include.
[19]
And a first material feed for the melt injection apparatus supplies a main mold flux; The second raw material supply section for supplying the additive, and; The first raw material supply section and the second mixing unit for preparing a mixture by mixing the additive and the main mold flux that is supplied from the second material feed; It may comprise; and melting unit for dissolving the mixture to be fed from the mixing unit generating a molten mold flux, and injection of the molten mold flux to the mold.
[20]
[21]
* The second raw material supply portion may selectively supply the plurality of additives store individually, and the plurality of additives to the mixing section.
[22]
The measurement unit may include a temperature measuring instrument for measuring the temperature of the mold.
[23]
Wherein the measuring unit may include an analyzer to the probe to collect a molten mold flux injected into the mold, a component analysis of the molten mold flux collected by the probe.
[24]
The controller may control the type and amount of additives to control parts of the second raw material supply according to the result of determining whether the input of the additives using the measured result by the measurement unit.
[25]
[26]
* A casting method according to the embodiment of the present invention, the step of providing a main mold flux; The process of injecting the molten steel in the mold; The process of melt to the main mold flux producing a molten mold flux, and injection of the molten mold flux to the molten steel thereon; The process of casting a slab; May include a; and the determining of whether the input of the additive according to the casting conditions in the process of casting the cast steel.
[27]
In the process of providing the main mold flux, it is possible to provide the additive.
[28]
In the process of melt to the main mold flux producing a molten mold flux, it is possible to melt with the additive and the main mold flux.
[29]
As the molding condition in the process of casting the cast slab measuring the temperature of the mold, and can according to the temperature value of the measured mold determining whether the input of the additive.
[30]
Analyzing the composition of the molten mold flux injected into the mold as the casting conditions as in the process of casting the cast steel, and may determine whether the input of the additive according to the components of the analysis molten mold flux.
[31]
When the injection of the additive crystals, and melting after mixing the additive and the main mold flux may be injected into the molten mold flux components are changed in the mold.
[32]
When the type of molten steel to be injected into the mold to change in the course of casting the cast steel melt then a solution of the additive and the main mold flux may be changed molten components are injected into the mold flux to the mold.
[33]
When mixing the additive and the main mold flux, it can inject the additives of different components depending on the kind of the molten steel.
[34]
When mixing the additive and the main mold flux, and may change the amount of additive that has the same components, depending on the type of the molten steel.
Effects of the Invention
[35]
According to the embodiments of the present invention, to respond quickly to changes in the components of the casting mold slag can improve the casting efficiency and the quality of the main room. That is, by adding an additive for adjusting the composition of slag during casting mold may correspond in real time to changes in component of the mold slag. Therefore, to prevent the development of cracks or rupture of the product solidified cell surface components by changes in the mold slag, so it is possible to improve the quality of the main room. In addition, it is possible to dwell weeks it becomes possible to enhance productivity single steel grade.
[36]
In the case of soft playing multiple grades it can offer to quickly produce a suitable melting mold flux on the steel grade is possible to improve the casting efficiency. Therefore, it is possible to each other, reducing the amount of time that the molten mold flux having a different mixing properties by inhibiting or preventing the rupture has occurred, such as the cast.
Brief Description of the Drawings
[37]
1 is a view schematically showing a casting apparatus according to an embodiment of the present invention.
[38]
2 is a view showing a configuration of the substantial part of the casting equipment shown in Fig.
[39]
Figure 3 is a block diagram showing the configuration of the casting equipment shown in Fig.
[40]
Figure 4 is a flow diagram showing a casting process according to the first embodiment of the present invention in order.
[41]
Figure 5 is a block diagram which bore a method of injecting molten mold flux to the mold conceptually When casting a cast steel by casting method according to a second embodiment of the present invention.
[42]
Figure 6 is a graph showing an experimental result according to whether the input of the additive when casting a cast steel by casting method according to an embodiment of the invention.
Mode for the Invention
[43]
With reference to the accompanying drawings will be described an embodiment of the present invention; However, the present invention is not limited to the embodiments set forth herein will be embodied in many different forms, but the embodiments are the scope of the invention to those skilled in the art, and the teachings of the present invention to complete It will be provided to fully inform.
[44]
1 is a configuration of the casting equipment shown in a view schematically showing a casting apparatus according to an embodiment of the invention, and Figure 2 is a diagram showing a configuration of the substantial part of the casting equipment shown in Fig. 1, Fig. 3 is a It shows a block diagram.
[45]
1, the casting apparatus according to the embodiment of the present invention, and the molten steel is a ladle (10) Add refined in the steelmaking process, supplying a molten steel from an injection nozzle (not shown) connected to the ladle 10 and it receives and stores it temporarily to the mold 30 for transmission receives the initial solidification to the certain shape to the molten steel through the immersion nozzle 22 connected to the tundish 20 and the tundish 20 is supplied to the mold (30), is provided in the lower portion of the mold 30 may include a cooling line 40 with a plurality of segments which are sequentially arranged to perform a series of forming operations with cooling of the unsolidified slab (1) pulled out of the mold 30 .
[46]
In addition, 2 and 3, the casting system to the components change in the mold flux melt injection apparatus 100 and the mold (30) for supplying and melting the mold flux to the molten steel bath surface to be supplied to the mold (30) according may include a controller 140 that controls the operation of the melt injection device 100 according to the measurement result of phenomena and measurement unit 130, a measuring unit 130 for measuring.
[47]
Melt injection device 100 can melt the mold flux in the solid state to supply the liquid of the mold flux, that is, melting the mold 30 to the mold 30. Conventionally, the melt injected into a mold by the apparatus 30 to be provided having a particular component as the melt in real time by a heating means such as a plasma torch in accordance with the steel grade was fed to the mold (30). However, the casting when the mold (30) within the supplied molten mold 30 is to react with impurities of the molten steel even if the change is the component, the melt injection device in still supplying a mold (30) of the same component casting of the mold 30 due to it was not possible to in real-time corresponding to changes in the component.
[48]
In addition, when playing open the yigangjong there is to change because of, depending on the steel grade being provided with a mold 30 of the different components in the mold 30 with the appropriate components on the steel grade time consuming, the melting furnace 112 different in the component is a problem, such as the mold 30 is inevitably mixed mold 30 and solidified the mold 30 between the cells can not be smoothly injected into the solidification phenomena cell rupture occurred in.
[49]
In the present invention, it was constructed to melt injection device 100 to be able to change in real time the composition of the molten mold 30 to be supplied to the mold 30 in order to solve the problems of the above-described melt injection device. Hereinafter referred to in the mold flux, after which before being fed to the melting furnace 112 is referred to a mold flux of the solid mold flux, and the dissolution of the mold plus the solid phase in the melting furnace 112 is referred to as a molten mold flux. Further, since the injection of the molten mold flux to the mold 30, the mold is referred to as slag.
[50]
And a melt injection apparatus 100 includes a raw material supply portion 110 for supplying the mold flux in the solid state according to an embodiment of the present invention, by dissolving when supplied the mold flux in the solid phase produced a molten mold flux, and molding the molten mold flux ( 30) may include a controller 140 for controlling the operation of the melting unit 120 and the raw material supply section 110 and a melting section 120 for injection.
[51]
Raw material supply portion 110 includes a first raw material supply section 112, and the second raw material supply portion 114 for supplying a second material, the first material feed (112) and a second material feed (114 to supply a first source ) and the connection being a first material feed (112) and the second mixer (116 to mix the first material and the second raw material supplied from the raw material supply section 114 for producing a mixture of the first material and second material) It can be included. Further, the material feed portion (110) of claim 1 between the first material and the mixture of the second material through the mixing portion 116, but may be supplied to the melt section 120, a mixing portion 116 and the melting portion 120 It may comprise a material or first materials and a raw material that can supply a constant mixture of the second material to the melt section 120 supplies 118.
[52]
The first raw material supply section 112 is a first material, for example, the first feed pipe for the first reservoir (112a) for storing the main mold flux, communication between the first reservoir (112a) and the mixing section (116), (112b ) can include.
[53]
The first reservoir (112a) stores a first source, for example, the main mold flux in the solid state. The portion of the main mold flux discharged from the first reservoir (112a) or the first transfer pipe (112b) has a first section chulgi (112c to the first transfer pipe (112b) predetermined amount by or uniformly discharged into the main mold flux ) it can be provided. At this time, 1.01 chulgi (112c) is first reservoir (112a) or the first transfer pipe is provided in (112b) may be a screw feeder to be activated by an operation of the driving device, the first reservoir (112a) and the first may be a valve for opening and closing a flow passage connecting the top or inside the first transfer pipe (112b) of the transfer pipe (112b).
[54]
The second raw material supply section 114 is a second source, such as a second reservoir (114a) for storing the additive, the second reservoir (114a) and the second feed pipe for communication between the mixing section (116) (114b) It can be included. In this case, the second reservoir (114a) is provided with a plurality of can store each independently a wide variety of additives. Be provided with a section 2 for each of the second reservoir (114a), the additive is discharged portions or the second transfer pipe (114b), the amount by or evenly discharge the additive into the mixing unit 116 which in chulgi (114c) number, and the second section chulgi (114c) is first reservoir (112a) and the second is provided in the transfer pipe (114b) may be a screw feeder to be activated by an operation of the drive unit, the second reservoir (114a) and it may be a second transfer pipe (114b) for opening and closing the connections, or open and close the flow passage inside the second transfer pipe (114b) of the valve.
[55]
The second raw material supply section through this arrangement 114 may optionally supply with at least one of additives of a plurality of additives.
[56]
Mixing section 116 may be supplied to the first raw material supply section 112 and the second raw material supply section 114, the molten part 120 of the main mold flux and the additives are uniformly mixed mold flux discharged from. Further, the mixing portion 116 is only the first raw material supplied from the first raw material supply section 112 may be supplied to the melt section 120. Mixing unit 116 comprises a main mold flux that is received in the first raw material supply section 112 and the second and the mixing vessel (116a) for receiving a main mold flux and additives supplied from the raw material supply section 114, a mixing vessel (116a) the may include a third transfer pipe (116b) for transporting a stirrer for uniformly mixing the additive (not shown), and a main mold a mixture of flux and additive, that is, mold flux into the molten portion 120.
[57]
Mixing vessel (116a) may receive a first material feed (112) and a second main mold flux in the solid state is discharged from the raw material supply part 114 and the additive. Portion in which the mixture of the main mold flux and additive discharged from the mixing container (116a) and the third feed pipe (116b), the third section chulgi to the first source and the second predetermined amount by or evenly discharge the mixture of the starting material ( the 116c) may be provided. At this time, the third section chulgi (116c) is a mixing vessel (116a) and the third feed is installed in the pipe (116b) may be a screw that operates by the driving of a motor, a mixing vessel (116a) and the third feed pipe (116b ) open and close the connection part, or the third feed pipe (116b) may be a valve for opening and closing a flow path inside.
[58]
Stirrer may be formed as a screw impeller or the like that is configured to be rotatable in the mixing vessel (116a). In addition to the agitator it may be a nozzle capable of blowing an inert gas or the like into the mixing vessel (116a).
[59]
This section may be uniformly mixed and the mixing portion 116, a mixing container (116a), and although described as being configured to include a stirrer, a main mold flux and configured to be rotatable mixing container (116a) with no agitator and additives . Mixing portion 116 may be formed in a variety of forms that can be mixed uniformly in the main mold flux and the additive is not limited to this.
[60]
Further, the mixing portion 116 may include a heater (116d) for preheating a mixture of the main mold flux or mold flux with a main additive. Burner (116d) may be provided with a stirrer or mixing container, heating the main mold flux or mold a mixture of the main flux and the additives at a constant temperature it can be supplied into the raw material supply (118).
[61]
Raw material feeder 118 is connected to the third transfer pipe (116b) and in communication with the third reservoir (118a) and a third reservoir (118a) and the molten part 120 of the mixing portion 116 and the inner channel of the fourth feed pipe (118b) for supplying a mixture of a first material or first materials and a second material with a third reservoir (118a) within or claim 4 is provided in the transfer pipe (118b) the first source or the it may be provided with a fourth section chulgi (118c) to a fixed amount or by uniformly discharging the mixture of the first material and the second material to the molten portion 120. the 4 is provided in the section chulgi (118c) is also one of the first to third section chulgi above (112c, 114c, 116c), and as a third reservoir (118a) and a fourth transfer pipe (118b) by operation of the drive unit It may be a screw feeder or valve operation.
[62]
In addition, the material feeder 118 may include a heater (118d) for preheating the main mold flux or mold a mixture of the main flux and the additives supplied from the mixing unit 116. The Burner (118d) comprises a may be provided in the third reservoir (118a) and a fourth transfer pipe (118b), heating the main mold flux or the main mold a mixture of flux and additives to a predetermined temperature to supply the melter 120 can. This mixture appears to facilitate the dissolution of the main mold flux or mold flux with a main additive can more quickly respond to changes in component of the mold slag.
[63]
Melt unit 120 heats the mold flux, that is, the mixture of the main mold flux and additives supplied from the mixing unit 116 to generate and temporarily store the molten mold flux by melting the upper part, and by discharging the molten mold flux mold ( It can be injected in 30). Melting portion 120 may include a heat source supply unit 128 to the furnace 112 that the mixture to be fed from the mixing section 116 is accommodated, a heat source supplied to the furnace interior (112).
[64]
Melting furnace 112, the main mold flux and additive are injected being dissolved dissolved space therein is formed at one side may be formed with a discharge port 126 for injecting a molten mold flux to the mold (30). Melting furnace 112 is formed in a substantially "V" shape with the center of the downwardly bent, it can be provided to enable tilting. Melting furnace 112 has a discharge port (126 for injecting the injection port 124 for injecting a mold flux discharged from the mixing portion 116 to the upper portion by melting space, and the molten mold flux generated in the melting space in the mold 30 ) may include. And the melting furnace 112 may have a ten won supply 128 connected to one side to be capable of supplying a heat source in the melting space. As a result, the mold flux in the heat source is supplied from one side of the furnace 112 melting space is dissolved and molten mold flux is generated and temporarily stored, it is that the molten mold flux discharged through the discharge port 126 of the other injected into the mold (30) It can be. This melting furnace as possible, since 112 is configured to be capable of tilting, as the tilt degree of the furnace 112 may adjust the flow rate of the molten mold flux that is temporarily stored in a soluble space.
[65]
Ten won supply part 128 is nitrogen (N to the plasma torch and the plasma torch 2 may include a gas supply pipe for supplying the plasma gas and so on), argon (Ar), helium (He). The plasma torch is a device for generating a plasma of at least 20,000 ℃ high temperature using an electrical, to generate plasma in the melting area of the furnace 112. The plasma torch may include a power supply for supplying power to the induction coil and the induction coil is disposed surrounding the plasma confinement tube and the plasma confinement tube is a plasma gas supplied from the gas supply pipe and so on receiving. Thus when power to the induction coil from the power supply is a plasma is generated inside the plasma confinement tube. Thus heat generated by the plasma and the plasma may be used as a heat source for dissolving the mold flux and the additive mixtures, i.e. a solid phase that is fed to the melting space through the inlet 124. Melting of the mold flux melting space is discharged through the discharge port 126. When the dissolution has been temporarily stored in the space tilting the melting furnace 112 may be injected into the mold (30).
[66]
A melting furnace (112) constituting the melting section 120, in addition it is understood that may have a variety of shapes, molten mold flux can be discharged in a variety of ways. The melting section 120 as a more particular description of the known techniques, such is omitted.
[67]
Through this configuration melt injection device 100 may be injected into the mold (30) was dissolved by adjusting the composition of mold flux in real time.
[68]
In addition, may be a measurement unit 130, a probe for measuring the components of the mold flux injected into the temperature measuring devices or the mold 30 to be provided, and measuring the heat transfer behavior of the molds 30 to the molds 30 .
[69]
When the temperature measuring instrument used in the measurement unit 130, a temperature meter is provided in the mold 30, it is possible to measure the temperature of the mold (30). For example, in the case that a single type of steel Synchro playing When a certain time has passed after casting in the mold slag Al 2 O 3 is the inlet will increase the viscosity of the mold slag. As a result, the mold slag between mold 30 and the cell clot is unevenly flows, the lubrication does not work properly. In the coagulation cells, these effects of heat transfer to the mold 30 does not uniformly performed is a deviation occurs in the temperature value measured by the temperature measuring devices. Therefore, in accordance with the temperature value measured by the temperature meter to change the forward component of the molten mold flux is injected into the mold 30, it is possible to improve the casting performance by injection into a mold (30).
[70]
In addition, when using a probe as a measuring unit 130, the mold 30, the mold taken some of the slag, and probe the mold analyze components of the slag to the molten mold flux to be injected into the mold 30 and the mold taken through We can compare the composition of the slag. The component corresponding to the change of the mold during casting to the next slag changes the composition of the molten flux is injected into the mold to the mold 30 by injection into the mold 30, it is possible to improve casting performance.
[71]
For mixing the additives, the mold flux through using the measurement result of the measuring part 130, information in this way it will be referred to again in the description of the casting process.
[72]
Controller 140 component of the molten mold flux that receives the measurement result of the measurer (130) injected into the mold 30 by controlling the feed rate of the main mold flux and additives to control the operation of the material feed portion according to the measurement result a it can be controlled. The controller 140 may also adjust the supply amount of the molten mold flux to be injected into the mold 30 in accordance with the measurement result to control the operation of the melting unit 120 and the measurement unit 130.
[73]
Hereinafter, a description will be given on the casting method in the embodiment;
[74]
Casting method according to the invention, it may include a second embodiment, a first embodiment of casting a cast steel using a single type of steel and, by using the yigangjong casting a cast steel.
[75]
4 is a flow chart showing a casting method according to the first embodiment of the present invention in order.
[76]
First, a description will be given of a first embodiment of casting a cast steel using a single type of steel.
[77]
Casting method according to the first embodiment of the present invention, the process of implanting the main mold molten steel subjected to the process (S110), the ladle 10, tundish 20, which provide a flux and additives to a mold (30) (S120 ), the mold (30) within one of injecting a molten mold flux to the upper portion of the injected molten steel process (S130), the process (S140), and analyzed by determining (S150) whether or not additives in the molding conditions of measuring the cast condition after the additive to commit may include the step (S160). The process of injecting the process, the molten mold flux for injecting molten steel in the mold 30 can be made continuously while casting is in progress. And the process of injecting the process and the additive for measuring the casting conditions can be carried out repeatedly while the casting is in progress by the process is complete, the casting is judged (S170).
[78]
Hereinafter, the molten mold flux that is injected into the mold 30 to the initial casting of a first molten mold flux, is mixed with the additives of the casting mold flux La melt the second molten mold flux that is injected into the mold (30).
[79]
The process of providing a main mold flux and additives is first prepared a main mold flux in the solid state in the reservoir (112a) and the second reservoir (114a) is to arrange an additive to be mixed with the main mold flux during casting. At this time, the molten mold flux are CaO, SiO 2 , MnO, P 2 O 5 , Al 2 O 3 , MgO, TiO 2 , K 2 O, Na 2 O, F, Fe 2 O 3 , and the like. Main mold flux may be made to have a composition suitable for the steel used in casting. And additive NaF (S), Na 3 AlF 6 , CaF 2 (S), AlF 3 (s), SiO 2 (s), Li 2 O (s), LiF (s), CaO, MnO, P 2 O 5 , MgO, Al 2 O 3 (s), TiO 2 , Fe 2 O 3 , K 2 O (s), Na 2 O (s), any one of C, or be a mixture of at least two components, can.
[80]
The process of injecting the molten steel in the mold (30) is supplied to the tundish 20 in the refining process the refining is done through a nozzle injecting the molten steel accommodated in the ladle 10, and supplied to the tundish 20, the molten steel is turned through an immersion nozzle 22 provided in the dish (20) it is injected into the mold (30).
[81]
When the molten steel to some extent in injection mold 30 is injected into the first molten mold flux to a molten steel in the upper mold (30). A first molten mold flux has a main mold flux stored in the first reservoir (112a) via the mixing container (116a) of the mixing unit 116 it may be prepared by melting in a melting section 120. A first molten mold flux to be injected into the initial casting may be manufactured by dissolving only a main mold flux in the melt section 120.
[82]
Thus, injecting the molten steel and the first molten mold flux to the mold 30 and the cast steel can be cast. Molding a first molten mold flux injection to 30, i.e. the mold slag mold 30 and the solidified cell is introduced between (or molten steel) controlling the heat transfer between the mold 30 and the solidified cell, lubrication by the action cast to smooth the cast.
[83]
The initial casting mold slag maintains the component when implanted, but while casting is in progress is an impurity of the molten slag flowing into the mold the components of the mold slag is changed. For example, the molten steel of Al 2 O 3 is to increase the viscosity of the mold slag when the slag flows into the mold. In this case, the mold slag mothayeo be smoothly introduced between the mold 30 and the solidified cell, the mold slag flows unevenly in the width direction and the longitudinal direction of the mold (30).
[84]
This effect consists of the non-uniform heat transfer between the mold 30 and the solidified cell it does not clot properly cell formation, so that the surface defects formed or after the cast slab is a slab rupture occurs.
[85]
The casting of the prepared by melting and then mixing the main mold flux and additives second molten mold flux, by injection into a mold (30) to quickly respond to the compositional changes of the mold slag mold slag is uniformly flows between the mold and the solidified cell that is to improve the quality of the main room.
[86]
If the additive is added it can be determined according to the change in the temperature change component and the slag of mold casting conditions, such as the mold 30.
[87]
It was measured by the change in temperature of the mold 30 during casting, and the molten mixture and then appropriate amounts of additives to the mold flux according to the measured temperature in the injection mold 30 can quickly respond to changing components of the mold slag. Therefore, by allowing the mold slag can be uniformly flows between the mold 30 and the cell clot is possible to maintain the heat transfer characteristics, such as the initial casting and lubrication performance until the casting has been completed.
[88]
Mold 30 temperature measurement is the temperature value in the longitudinal direction, and (or) the width direction of the mold 30, the longitudinal direction and the width mold 30 is installed a plurality of temperature measuring devices, and in the direction of the mold 30 of the It can be measured. Then you can measure the deviation of the temperature measured at the temperature gauge. When the measured temperature value is included from the casting initially measured temperature value to the deviation range of about greater than 0 to 5% it may be carried out as a casting. Or it may be a measured temperature value is determined to inject the additive, if beyond the error range set forth above.
[89]
The result of comparison, when included in the measured temperature value of the deviation range of the mold slag mold 30 and solidified and is uniformly injected between cells of the same components is determined that a component change in the mold slag insignificant with Casting initial molten mold flux, that is, and injecting a first molten mold flux to the mold (30).
[90]
But it can be injected, if the temperature measured value is outside the variation range, the molten mold flux is additive injected is determined that a change in the mold slag components greatly takes place, that is, the second molten mold flux to the mold (30).
[91]
The choice of additive to be injected in the mold 30 can be selected as follows.
[92]
Casting initially because there is little change in the component mold slag, the temperature value measured by the temperature measuring instrument is changed within a certain range. However, as casting proceeds the impurities of the molten steel is introduced into the mold slag is a change in the components of the mold slag generation. For example, the molten steel of Al 2 O 3 or the inlet, the mold is fluorine (F) component is volatilized during the slag can be increased, the viscosity of the mold slag. In this case, because the mold slag not uniformly flows between the mold 30 and the cell clot is the heat transfer performance is the change in temperature value occur is measured from the temperature measuring devices are installed in a mold (30). In such a case it is possible to suppress or prevent lowering of the molding efficiency by the change in the component mold in the slag by the injection mold 30 was mixed to melt the mold flux and additives. Al in the mold slag 2 O 3 when a large quantity is introduced as an additive NaF, CaF 2 , Li 2 CO 3 if the at least can be used for any one of a fluorine mold slag of such volatiles, the Na 3 AlF 6Can be used at least one of NaF and so on. Thus, because the viscosity of the slag within the mold the mold 30 can be lowered to some extent can be molded slag is uniformly injected between the mold 30 and the solidified cell. For example Na in the additive when injected into the molten slag to the mold 1㎏ / min 3 AlF 6 can be added to the 50g / min. That is, it is possible to put in 1 to 5% by weight based on the total weight of the melt-mold slag. In this case, it is the fluorine content of the components of the mold slag to be injected into the mold 30 is increased by ~ 2.7% by weight, the viscosity of the slag is increased, the mold can be a mold slag smoothly it flows between the mold and the solidified cell. On the other hand, Al 2 O 3 and Na 2 is somewhat increased within the O ingredients from greater than 0 to 2% by weight. Al 2 O 3 and Na 2 changes of the O content does not significantly affect the casting mimihayeo than the fluorine content changes.
[93]
In addition to the additive is of course that at least one of various kinds of additives described above can be used.
[94]
The main mold is made a mix of flux and additive through the control unit 140, control unit 140 measurement unit 130, for example, by receiving the measurement result from the measuring of temperature chulgi section I of a first material feed (112) (112c), a second first by controlling the operation of the second section chulgi (114c) mixing each of the stored main mold flux and the additive in the first reservoir (112a) and the second reservoir (114a) of the raw material supply section 114 It is supplied to the mixing container (116a) of section 116.
[95]
Then, the control unit 140 uniformly mixing the main mold flux and additive supply by operating the agitator of the mixing unit 116 into a mixing vessel (116a). A When the main mold flux and additives are uniformly mixed, the controller 140 furnace 112 of the mixing portion 116, the third section chulgi operates the (116c) the main mold melt and the mixture of the flux and the additive portion 120 of the inject.
[96]
The mixture is injected into the furnace 112 is dissolved by heat, that is, the plasma supplied from the heat source supply unit (128) of the molten portion 120 is made of a second molten mold flux. The thus prepared second molten mold flux is injected into the mold 30 through the discharge port 126 formed in the melting furnace 112 by the tilting of the melting furnace 112 and mixed with the mold slag. This is the viscosity of the slag within the mold the mold 30 can be uniformly flows between the lower mold 30 and the solidified cell.
[97]
In this way it is possible to the temperature of the mold 30 in the process of casting a cast steel continuously monitored, rapidly improving the quality of the main convenience in response to temperature changes of the mold 30 by changing components of the mold slag. Control components of the mold during casting slag can be carried out in a number of times repeatedly in accordance with the measurement result by the measurement unit 130. Therefore, by increasing the number of the molten steel amount, that is up (charge) that is the deterioration of the device does not occur, such as an immersion nozzle 22, it is possible to rapidly respond to the compositional changes of the mold slag during casting to control the components of the mold slag it is possible to extend the casting time, it is capable of dwell price it is possible to improve the cast product.
[98]
Here has been described by measuring the change in the mold slag components through a change in temperature of the mold 30, it may be collected by the slag during the casting mold to analyze the components of the mold slag. Or, Al in the mold slag 2 O 3 when the inlet because the color change of the molded slag with the naked eye can be measured for changes in component of the mold slag.
[99]
Hereinafter, a description will be given of a second embodiment of the present invention.
[100]
Figure 5 is a block diagram that illustrates a method of injecting molten mold flux to the mold conceptually some cases, a cast steel cast by the casting method according to a second embodiment of the present invention.
[101]
In the second embodiment of the present invention will be described with respect to the other steel type, for example, a method for molding yigangjong.
[102]
For example and if a cast steel cast by using a steel or Al and Mn steel is using mold flux having a different composition. At this time, the mold flux used are CaO, SiO 2 , MnO, P 2 O 5 , Al 2 O 3 , MgO, TiO 2 , K 2 O, Na 2 O, F, Fe 2 O 3 . However the like, and and a difference in content, and may further contain other components other than that. Therefore, if such a casting yigangjong continuously is injected into different mold flux when the steel grade is changed. In this case low output of the grades to be separately maryeonhaeya, and casting a suitable mold flux according to the type of steel, the furnace residual discard the molten mold flux, and by melting the new mold flux providing a molten mold flux or of the different components casting of the mold flux is blend is a transition period to be supplied to the mold 30 occurs.
[103]
Thus the second embodiment of the present invention depending on the type of steel to be used during casting to control the components of the molten mold flux to be injected into the mold (30).
[104]
Hereinafter referred to as the mold flux that can be applied to any type of steel which includes a main mold flux, and the casting additive to be used is initially additives used when changes are made to the type of steel of the first additive, the casting is referred to as the second additive. In addition, the additive used according to the measured result by the measurement unit 130 during casting is referred to as a third additive.
[105]
Casting method according to the second embodiment of the present invention, the main mold flux as the first additive, the second additive and a mold a first molten steel passed through the process, ladle 10, tundish 20, which provide a third additive 30. the process of injection in a mold 30 within a on top of the injected first molten main mold flux from the first additive prepared by mixing a first step of injecting a first molten mold flux, is cast using a first molten steel Once complete, the process of injecting a second molten steel in the mold 30, the mold 30 within the implanted second steel main mold flux to the top of the second additives of injecting the prepared second molten mold flux using It may include a process. In addition, it is possible to include the step of injecting a third additive according to the procedure and conditions of casting the molten steel and the second one using a cast steel measuring state in the process of casting a cast steel.
[106]
And here it can be carried out the casting process using the casting process and the second molten steel using one steel continuously, the process of injecting process and a third additive which measures the casting state is the completion of the casting with a second steel while the casting is in progress is determined by the process it can be carried out repeatedly.
[107]
Firstly, the first additive for adjusting the composition of mold flux according to the main mold flux with a first additive, the second additive and the process of providing a third additive, and the main mold flux that can be applied to any type of steel, the steel grade and providing a second additive to adjust the slag component of the mold during casting. Main mold flux are CaO, SiO 2 , MnO, P 2 O 5 , Al 2 O 3 , MgO, TiO 2 , K 2 O, Na 2 O, F, Fe 2 O 3 , and the like. And a third additive NaF (S), Na 3 AlF 6 , CaF 2 (S), AlF 3 (s), SiO 2 (s), Li 2 O (s), LiF (s), CaO, MnO, P 2 O 5 , MgO, Al 2 O 3 (s), TiO 2 , Fe 2 O 3 , K 2 O (s), Na 2 O (s), at least one of C may be. And a first additive and the second additive may include at least one of the components of the main mold flux as to control the components of the mold flux according to the type of steel, it is possible to include at least one of the components of the second additive . That is, the first additive and the second additive is CaO, SiO 2 , MnO, P 2 O 5 , Al 2 O 3 , MgO, TiO 2 , K 2 O, Na 2 O, F, Fe 2 O 3, NaF (S), Na 3 AlF 6 , CaF 2 (S), AlF 3 (s), SiO 2 (s), Li 2 O (s), LiF (s), CaO, MnO, P 2 O 5 , MgO, Al 2 O 3 (s), TiO 2 , Fe 2 O 3 , K 2 O (s), Na 2 O (s), it may be at least any of C. It may also be a first additive and the second additive, the same component with each other.
[108]
Thus prepared main mold flux may be stored in the first source storage portion the first reservoir (112a), the first additive and the second additive and the third additive is stored in a second reservoir (114a) of the second raw material storage It can be. In this case, the second reservoir (114a) is provided with a plurality of can store a first additive and the second additive and the third additives each component.
[109]
Thereafter, when casting starts, injecting a first molten steel in the mold (30) and injecting a first molten mold flux produced by mixing the main mold flux with a first additive to the first upper molten steel.
[110]
And when the casting is completed, with a first molten steel injected into the molten steel 2 in the mold 30 and injecting a second molten steel above the main mold flux and the second molten mold flux was prepared by mixing the second additive on.
[111]
For example, the first high-manganese steel and the molten steel, the second molten steel and manganese-aluminum case and robust, the first molten mold flux and the second molten mold flux is Al 2 O 3 has a difference in the amount of. That is, the first molten mold flux contains Al than the second molten mold flux 2 O 3 is contained is less.
[112]
Therefore, the first molten steel at this time to be injected very small amount, for example less than 1% Al as the main mold flux with a first additive to the casting initial mold (30) 2 O 3 added to, and is cast using a first molten steel is completed and the mold (30 ) to the second molten steel is 1% to 3% of Al to be injected when the main mold flux and the second additive 2 O 3 can be added to. At this time, the second additive may be added in a manner that the second molten mold flux gradually increased so as to have a suitable physical property in the second molten steel. This is because it can lead to the second when the physical properties of the molten mold flux, such as viscosity and basicity is rapidly changed not been smoothly introduced between the mold and the solidified cast cell rupture phenomena.
[113]
The examples in the first additive and the second additive is gradually the amount of the first additive and the second additive in accordance with the type of molten steel that has been described for example in which comprises the same components increase the dosage, injection in the mold (30) It may be reduced, and that, the first component of the additive and the second additive be mutually different as a matter of course. Further, although description will be given on how to perform the molding by using two of the molten steel, it is also possible to perform the molding by using the two or more molten steel.
[114]
Further, yigangjong, that is, the first course is that measuring the casting conditions as in the embodiment described above, while the cast using the molten steel and the second molten steel and to adjust the mold slag components using a second additive in accordance with the measurement result to be.
[115]
Hereinafter will be described experimental examples to casting a cast steel by casting method according to the invention. This experiment looks at the mold temperature changes in accordance with whether the input of the additive in the process of casting a cast steel using a single type of steel.
[116]
Figure 6 illustrates a temperature change of the mold with and without a graph showing an experimental result according to whether the input of the additive when casting a cast steel by casting method according to an embodiment of the invention, additives added during casting.
[117]
Providing a plurality of temperature measuring devices in the mold (30), and measuring the temperature of the mold 30 during casting. Temperature measuring devices 300, 400 from the top of the mold 30 in the width direction, for example, state a plurality of points along the longitudinal direction, for example, main direction convenience casting convenience width of the mold 30 in the center direction, specifically, the mold 30 of the , 500 and was installed in 600㎜ point.
[118]
And the molten steel in the mold (30) was injected and injection in the upper molten steel injected into the first molten mold flux obtained by dissolving a main mold flux to the mold (30).
[119]
Referring to FIG 6, in the initial casting (A period) it can be seen that the change in the temperature of a range the mold (30). However, in the middle of the casting (B section) to change the temperature of the mold (30) suddenly, and it can be seen that the swing value is irregularly. Although observed for a period of time the mold 30, the temperature did not return to the same pattern as the initial casting (A zone).
[120]
Thus a mixture of main mold flux and additive were charged to the molten mold flux having a second melt to the mold (30). At this time, it was charged with a fluorine (F) as an additive.
[121]
Doeja second molten mold flux is put into a mold 30, the temperature of the mold 30 was gradually changed in a stable and varied within a certain range.
[122]
This phenomenon may be caused by the variation component through the reaction with the slag in the mold during casting the molten steel impurities. Therefore, by adjusting the components of the mold slag by introducing the additive during the casting, and can smoothly perform the casting, it is possible to suppress or prevent the cast degradation accordingly.
[123]
In the above can be applied to various operation steps refining process using a liquid material Tallinn has been described with respect to a method and apparatus for casting a cast steel, the present invention is not limited thereto.
[124]
Thus, the invention has been shown and described with reference to certain preferred embodiments thereof, various modifications are possible within the limits that do not depart from the scope of the invention. Therefore, the scope of the invention limited to the described embodiments are jeonghaejyeoseo should not, should be below the claims, as well as defined by the claims and their equivalents.
Industrial Applicability
[125]
Melt inlet, foundry equipment and die-casting method using the same according to the present invention is applied to a continuous casting step of casting a cast steel can improve the cast quality and productivity.

Claims

[Claim 1]Each feedstock supply for the raw material and the heterogeneous; Mixing portion for mixing the raw material to prepare a mixture of different types of which is supplied from the material feed portion and; Melting portion is connected with the mixing unit which generates a melt by melting the mixture to be fed from the mixing section, and a discharge port is provided in which the melt is ejected; And a control unit for controlling the components of the mixture to control the raw material supply portion, a mixing portion and a melt operation portion; Melt injection device comprising a.
[Claim 2]
The method according to claim 1, melt injection device comprising a first raw material supply section to the raw material supply unit supplying a first raw material, second raw material supply portion to each other, which individually supplied to a plurality of second material having a different composition.
[Claim 3]
The method according to claim 2, the first raw material supply unit, a first storage group and to store the first source; First transfer pipe for connecting the mixing portion of the first storage group; And 1.01 chulgi to control the discharge amount of the first material is provided on at least one of the first stored group and the first transfer conduit; Melt injection device comprising a.
[Claim 4]
The method according to claim 3, wherein the second raw material supply portion, a plurality of second storage for storing the plurality of the second source group, respectively; The second feed piping connecting each of the plurality of second storage group and the mixing part and; And a second section chulgi that is provided to at least one of said second storage group and the second transfer pipe to adjust the discharge amount of the second material; Melt injection device comprising a.
[Claim 5]
The method according to claim 4, wherein the mixing section mixing in communication with the first supply pipe and the second supply pipe vessel; It is provided in the mixing vessel, an agitator for mixing the first material and the second material; And the third feed pipe for conveying the mixture of the first material and the second raw material melting portion; Melt injection device comprising a.
[Claim 6]
The method according to claim 4, wherein the mixing portion of the first supply pipe and the second supply pipe and comprises a mixing container in fluid communication, and wherein the mixing vessel is a rotatable melt injection device.
[Claim 7]
The method according to claim 6, and the molten portion, the melting furnace having the first raw material and the melting space in which the second source is received and dissolved therein; Melt injection apparatus including; is provided at one side of the furnace ten won supply unit for supplying a heat source in the melting space.
[Claim 8]
The system according to claim 7, wherein the heat source supply unit melt injection apparatus using a plasma as a heat source.
[Claim 9]
The method according to claim 8, wherein the controller melt injection device for controlling whether input of said second raw material in accordance with the input signal.
[Claim 10]
A casting plant, and the mold for the initial solidification receiving the molten steel; Melt injection device for injecting a molten mold flux to the mold, and; At least one part of the measured components of the molten mold flux that is injected, and the mold temperature of the mold; And a controller for controlling operation of the injection device so as to melt possible to change the components of the molten mold flux is injected in the mold in accordance with the measuring portion measurement result; casting plant comprising a.
[Claim 11]
The method according to claim 10, with a first material feed for the melt injection apparatus supplies a main mold flux; The second raw material supply section for supplying the additive, and; The first raw material supply section and the second mixing unit for preparing a mixture by mixing the additive and the main mold flux that is supplied from the second material feed; And melting unit for dissolving the mixture to be fed from the mixing unit generating a molten mold flux, and injection of the molten mold flux to the mold; Casting plant comprising a.
[Claim 12]
The method according to claim 11, the casting equipment to the second raw material supply unit may store a plurality of additives individually and selectively supplying a plurality of additives to the mixing section.
[Claim 13]
The method according to claim 12, wherein the measuring unit Foundry equipment comprising a temperature measuring instrument for measuring the temperature of the mold.
[Claim 14]
The method according to claim 12, wherein the measuring unit casting plant comprising an analyzer for analyzing the probe and the ingredient of the molten mold flux collected by the probe to collect a molten mold flux injected into the mold.
[Claim 15]
The method according to claim 13 or claim 14, wherein the control unit determines the input whether the additive, adjusting the type and amount of the additive according to the result of the control portion and the second raw material feed using the measured result by the measurement unit Foundry equipment to.
[Claim 16]
As a casting method, comprising the steps of: providing a main mold flux; The process of injecting the molten steel in the mold; The process of melt to the main mold flux producing a molten mold flux, and injection of the molten mold flux to the molten steel thereon; The process of casting a slab; Casting methods including; and the determining of whether the input of the additive according to the casting conditions in the process of casting the cast steel.
[Claim 17]
The method according to claim 16, in the course of providing a flux of the main mold, the casting method of providing the additives.
[Claim 18]
The method according to claim 17, in the course of melt to the main mold flux producing a molten mold flux, the casting method of melting with the additives and the main mold flux.
[Claim 19]
The method according to claim 18, wherein the casting method for a casting state in the process of casting a cast steel wherein the measuring the temperature of the mold, determining whether the input of the additive according to the temperature value of the measured mold.
[Claim 20]
The method according to claim 18, the casting method of analyzing the components of the molten mold flux injected into the mold as the casting conditions as in the process of casting the cast steel, and determines the input whether the additive in accordance with the components of the analysis molten mold flux.
[Claim 21]
The method according to claim 19 or claim 20, when the casting method of injection of the additive crystals injected into the mold to melt the mold flux composition changed by melting and then mixing the additive and the main mold flux.
[Claim 22]
The method according to claim 21, casting method if the kind of the molten steel changes to be injected into the mold injection to the mold a molten mold flux the component modified by melting after mixing the additive and the main mold flux in the process of casting the cast steel .
[Claim 23]
The method according to claim 22, when mixing the additive and the main mold flux, casting method to inject the additives of different components depending on the kind of the molten steel.
[Claim 24]
The method according to claim 22, when mixing the additive and the main mold flux, the casting method of changing the amount of additives that have the same components, depending on the type of the molten steel.