The title of the invention: hot metal processing device and a hot metal treatment

Art

[1]

The present invention relates to that, more particularly, to hot metal process to increase the reaction efficiency of the desulfurizing agent apparatus and a hot metal treatment process related to the hot metal processing device and a hot metal treatment.

BACKGROUND

[2]

Manufactured through the iron making process in the blast furnace hot metal is molten steel and to obtain a product of desired composition and finally subjected to a refining process of adjusting the content of some components in the molten iron. Typically, the charge on after a refining adjusted to a certain level or less of sulfur (S), phosphorus (P) contained in the molten iron converter, the converter in the after controlling the components and the temperature, such as the oxygen blow C, P, through the secondary refining, and subjected to an additional component adjustment.

[3]

Here, the control at a concentration of sulfur (S) of the case, the sulfur (S) in the case such as the general lecture than free cutting steel, through the desulfurization step of the hot metal sulfur (S) less than 0.01% by weight of the steel grade to maintain a higher content of. In recent years, the demand is very low S standard, most typically less than 0.003% in the desulfurization process in the desulfurization step of the pre-treatment.

[4]

A method of desulfurizing hot metal using a mechanical stirring method is a relatively high desulfurizing efficiency. Mechanical stirring method is a method by rotating immersed with a stirrer, referred to as the impeller (Impeller) to the hot metal container is accommodated, by introducing a desulfurizing agent to the desulfurization by the reaction between the molten steel and the desulfurizing agent.

[5]

Exemplary method of the desulfurization method using a mechanical stirring method is keyial equipment; and a method using a (KR Kanvara reactor). Keyial equipment comprises a feeder to the position on the upper side of the impeller, that is immersed below the ladle, the molten steel is molten steel receiving rotational input to the desulfurizing agent to the ladle. According to the keyial facility, In the desulfurizing agent from the upper side of the future through the feeder, and by rotating an impeller, in response to the molten iron and the desulfurizing agent is being stirred is a sulfur (S) of the molten iron.

[6]

On the other hand, in normally using the powder (Powder) or a desulfurizing agent in the differential state of the solid phase to increase the efficiency of desulfurization, the desulfurization reaction product of CaS is produced in about 10 to 20㎛ thickness on the surface of the fine desulfurizing agent of the solid phase, and a dense film additional

[7]

It is generated and reacts that the desulfurization reaction proceeds. I.e., CaS is wrapped the surface of the fine powder of the solid desulfurizing agent, to prevent the presence of CaO and sulfur to hot metal inside (S) react to this. In addition, up between the desulfurizing agent particle aggregation and the desulfurizing agent is added to form the aggregates of the water within a few mm, the CaS is formed on the surface of the agglomerates desulfurization efficiency will drop from 5 to 10%.

[8]

Thus to increase the reaction efficiency of the desulfurizing agent, in Korea Patent Publication 2013-0024195, but it is by installing a ball balancing the impeller blades present a method for facilitating the dispersion of the desulfurizing agent improves the desulfurization efficiency of the impeller is structurally vulnerable frequent replacement equipment there are issues that need.

Detailed Description of the Invention

SUMMARY

[9]

The present invention provides a hot metal processing device and a hot metal treatment method that can increase the reaction efficiency of the desulfurizing agent.

[10]

The present invention provides a hot metal processing device and a hot metal treatment method capable of reducing the amount of desulfurizing agent and desulfurization time.

Problem solving means

[11]

Hot metal treatment unit in accordance with the present invention, the container is taken of the molten iron as possible; And a stirrer having an impeller which can be charged and to rotate into said vessel, is immersed in the hot metal inside the container stir the hot metal; When the state it was in before the impeller is immersed in the hot metal inside is disposed so as to penetrate through the side wall of the container, the container in the radial direction of the container, is higher than the bath surface height of the molten iron, wherein the impeller is immersed in the molten iron the container when the rotating state, is installed so as to be positioned lower than the top of the bath surface height of the molten iron, refiner injector having a nozzle for blowing a refiner for refining hot metal into the vessel; and a.

[12]

The refiner feeder, the refiner storage unit is stored in the refiner;

[13]

One end being coupled to the storage unit refiner, refiner feed line connected to the other end of the nozzle; It includes; and connected to the refiner feed line gas supply line for supplying an inert gas to effect movement of the refiner.

[14]

The nozzles are installed in contact with the outside face of the container to achieve the extension of the vertical extension in the transverse direction of the vessel.

[15]

The nozzle, each in contact with the outside face of the nozzle, the container forming the extended line extending in the width direction of the container is provided inclined so that an obtuse angle or an acute angle.

[16]

The nozzle is provided tilted in the rotational direction or the opposite direction of the impeller.

[17]

The nozzle, the molten iron upward direction separation distance between the top surface of in the state it was in before the impeller is immersed in the molten iron wherein the container is the impeller is immersed in a 10cm or more, within the molten iron wherein the vessel of the hot metal in a rotating state the downward direction separation distance between the uppermost surface is provided is positioned is at least 15cm.

[18]

The nozzles are installed provided with a plurality of the counter.

[19]

The hot metal processing apparatus keyial device; and (KR Kanvara reactor), the refiner is a desulfurizing agent to remove sulfur (S) of the molten iron.

[20]

[21]

Hot metal treatment process according to the invention is the process of taking the hot metal in the vessel; Immersing the impeller in hot metal the container, the process of by the rotational operation stirring the molten iron; process of In the refiner inwardly from the side wall of the container; includes, In a refiner with an inner side wall of the vessel from the sikineunde method, the inside of the vessel the molten iron is high, as compared with the bath surface height of the molten iron when the state it was in before the impeller is immersed, in, the top of the bath surface height of the molten iron when the state is the impeller is immersed rotated within the molten iron the container that the refiner is fed at a position lower than that.

[22]

In sikineunde In a refiner with an inner side wall of the container from, and to blow an inert gas with the refiner moving the refiner is added into the vessel.

[23]

In the refiner according to the inner side wall of the container from,

[24]

And the uppermost surface of the hot metal in a state in which the upper direction separation distance between the top surface of the molten iron in before the impeller is immersed in the molten iron the container state is the impeller is immersed rotated 10cm or more, within the molten iron the container the direction of the lower clearance is added to the refiner at more than 15cm position.

[25]

In sikineunde In a refiner with an inner side wall of the container from, the refiner is introduced is discharged through a nozzle installed to fulfill the extension and vertically extending in the width direction of the container in contact with the outside face of the container.

[26]

In sikineunde In a refiner with an inner side wall of the container from the refiner each is inclined at an obtuse angle or acute angle with the extension extending in contact with the outside the container side in the width direction of the container forms is installed on the side wall of the container, It is injected through a nozzle installed.

[27]

In sikineunde In a refiner with an inner side wall of the container from, the nozzle is installed tilted in the rotational direction or the opposite direction of the impeller, thereby In the refiner in a direction or in opposite directions corresponding to the rotational direction of the impeller.

[28]

In a refiner before the inner side wall of the container from it comprises the step of put the refiner from the top of the container.

[29]

With respect to the total time to put into the refiner to the molten iron refining the molten iron, the point at which the polishing is terminated the refiner from the top of the container when that 100% of the time, and then refining the start of the molten iron and the time to 10% in, and from the time in excess of the 10% in the refiner inwardly from the side wall of the container.

[30]

The scouring is to remove the sulfur (S) of the molten iron.

Effects of the Invention

[31]

According to an embodiment of the invention, and passes through the side wall of the container, is higher than the bath surface height when the stirring before the standby state of the impeller, molten iron, relative to the top of the bath surface height when the state in which the impeller is rotated at a maximum speed to install a nozzle in a low position, and inputs the refiner. Thus, there is an effect that, to reduce the use and refining time of the refiner according to the polishing efficiency is improved when compared to the input refiner in the upper container, as in the prior art.

Brief Description of the Drawings

[32]

1 is a diagram for explaining a hot metal treatment apparatus according to an embodiment of the present invention

[33]

Figure 2 is a top view of a hot metal treatment apparatus, showing the mounting of the nozzle according to an embodiment of the present invention

[34]

Figure 3 is the upper surface of the hot metal treatment apparatus, showing the installation state of the embodiment of the first modification nozzle according to FIG.

[35]

Figure 4 is a top plan view of a hot metal treatment apparatus, showing the installation state of the embodiment of the second modification of the nozzle according to FIG.

[36]

5 is a conceptual diagram illustrating the commitment period of the desulfurizing agent

Mode for the Invention

[37]

With reference to the accompanying drawings, the present will be described in more detail in an embodiment of the invention. However, the present invention is not limited to the embodiments set forth herein will be embodied in many different forms, but the embodiment are also the teachings of the present invention to complete, and will fully convey the concept of the invention to those of ordinary skill It will be provided to make known. Embodiment of the figure has been exaggerated for explanation, the same reference numerals in the drawings refers to the same element.

[38]

1 is a diagram for explaining a hot metal treatment apparatus according to an embodiment of the invention. Wherein Figure 1a is a state before the impeller of the agitator is immersed in the hot metal, Figure 1b shows a state in which the impeller is immersed in the hot metal. Figure 2 is a top view of a hot metal treatment apparatus, showing the mounting of the nozzle according to an embodiment of the invention. Figure 3 is a top view of a hot metal treatment apparatus, showing the mounting of the embodiment according to the first modification nozzle. Figure 4 is a top view of a hot metal treatment apparatus, showing the installation state of the embodiment of the second modification of the nozzle in accordance with. 5 is a conceptual diagram illustrating the input time of the desulfurizing agent.

[39]

1, the molten iron processing apparatus according to an embodiment of the present invention includes a stirrer 200 which is immersed into the container (L) hot metal (M) is received for the refining, the container (L) stirring the hot metal, hot metal ( installation inserted so as to penetrate through the side wall of the container (L) at a position lower than the uppermost height of the hot metal (M) high and is compared with the height of the bath surface, a stirrer (hot metal (M during stirring the molten iron using a 200)) before stirring M) is, a refiner feeder 100 having a nozzle 110 to inject the refiner to the molten iron.

[40]

[41]

Will be described below, for example, a desulfurization apparatus and desulfurization method of the components for adjusting according to the presence of hot metal and hot metal treatment apparatus according to an embodiment of the present invention, a sulfur (S) of the molten iron.

[42]

The container (L) is a container for the molten iron (M) to form a space therein by means which are stored or accommodated. For example, it may be a ladle (ladle) is used to grade or grade hot metal (M) in several work steps: The container (L) is stored in the molten iron temperature so may comprise a refractory wall which is provided on the inner shell and outer shell.

[43]

Of course, the container (L) is not limited to the ladle, the molten iron can be accommodated, and it is possible that the various means of the installation vessel capable of an agitator 200 and a nozzle 110.

[44]

Agitator 200 is submerged in hot metal (M) of taking in the container (L), as a means to stir the hot metal (M) by a rotation operation, and can be formed into a shape similar to a common agitator 200 in keyial device . That is, the agitator 200 is composed of a plurality of blades, molten iron (M) is formed is immersed extend in the impeller 210, the up-and-down direction to agitate the hot metal (M) to the shaft (220 is connected to the upper portion of the impeller 210 ), and a driver 230 for providing the rotational power to the shaft 220.

[45]

Wherein the impeller (210) comprising a plurality of blades has a width of the upper end it may be formed larger than the width of the lower end. That is, toward the lower end in the upper end may be formed to be inclined so that the narrower width. From this, in the hot metal (M) is agitated by the rotation of the impeller 210, it is possible to cause a downward flow. The shape of the impeller 210, and if it can be agitated sufficiently the hot metal (M) take the container (L), is not particularly limited as long as its structure and shape.

[46]

[47]

Refiner feeder 100 is hot metal (M) polishing, for example, the nozzle 110 to inject the refiner provided by the refiner storage section 120, a refiner storage unit 120 desulfurizing agent is stored for desulfurization in the container (L), one end of the connected to the refiner storage unit 120 and the other end the nozzle refiner supply line 130 is connected to 110, the gas storage unit 120, the gas is stored to make refiner can move through scouring supply line 130, one end is connected to a gas storage unit 120, the other end connected to the refiner feed line 130 or refiner storage unit 120, a gas supply line 150 that enables the refiner to be moved to the nozzle 110 It includes.

[48]

Scouring agent is a solid, as powder or fine particle state, for example, desulfurization and can best, may be more specifically CaO-based material. The present invention is not limited thereto, CaC 2 may be used based, Mg-based desulfurizing agent in the. The desulfurizing agent is stored in a refiner storage unit 120, it is supplied to the inside of the container (L) through a refiner feed line 130 and nozzle 110.

[49]

Scouring agent storage unit 120 according to the embodiment is not limited to this hopper (hopper), or, it is possible to store or accommodate the refiner, can be applied in various storage means capable of supplying a refiner to refiner feed line.

[50]

Scouring agent supply line 130 and gas supply line 150 as described above as a flow channel for moving the refiner of the refiner storage unit 120 to the nozzle 110, a tube or pipe shape having an internal space.

[51]

[52]

On the other hand, the height of the uppermost surface of the molten iron, as the impeller 210 is illustrated in Figure 1a before the immersion into the molten iron bath surface maintains a horizontal state without a pretty much change. However, the impeller 210 is immersed into the molten iron when rotated, as shown in Figure 1b, the impeller 210 is seen a low molten iron bath surface behavior compared to the area that is, the height of the bath surface edge bath surface corresponding to the center position. In other words, the bath surface behavior toward increasing the bath surface height around the impeller 210 in both the lateral direction is displayed.

[53]

In the present invention, to determine the installation position of the nozzle 110 in consideration of the height of the molten iron bath surface at the time before the immersion of the impeller so while stirring after immersion.

[54]

[55]

The nozzle 110 is installed so as to penetrate in the transverse direction (width direction of the container) from a side wall of the container (L), and In the refiner, for example, the desulfurizing agent in the molten iron (M) the taking in the container (L). At this time, the molten iron from the nozzle 110, the vessel according to which is installed in (L), there is limited in installation height, hot metal (M) stirring before or agitator 200 operating before the state (hereinafter referred to as a standby state) (M) of the top surface height (H in (bath surface), one top of the high compared to) (see Fig. 1a), hot metal (M) at the time for refining or desulfurizing the agitator 200, the operation (hereinafter, referred to during the polishing operation of the molten iron) surface height (H a (see Fig. 2) two will be positioned lower than). And, more specifically, when the hot metal (M) to at least 10cm or more, more preferably from the bath surface is located on the upper side more than 15cm, the impeller (210) during the polishing (desulfurization) operation in the standby state is hayeoteul rotating at full speed, the molten iron It is installed at the lower side for at least 15cm from the (M) bath surface. Here, 10cm upper position from the hot metal (M) of the bath surface in the stand-by state is the maximum lower limit height of the nozzle (110), located 15cm from the lower side polishing (desulfurization) hot metal bath surface at the time of operation is a maximum upper limit value of the height of the nozzle.

[56]

[57]

To do this by the maximum lower limit height of the nozzle (110) is restricted to 10cm from hot metal (M) bath surface in a stand-by state, waiting is not refining hot metal (M) state, the thickness of the slag bath surface shaking of the transport of containers, etc. the nozzle 110 is to prevent the not in contact with the molten iron is not generated a problem such as melting or clogging. That is, in other words, but the nozzle 110 is located above the hot metal (M) bath surface of the stand-by state, if it is located in less than 10 cm the upper side of the said hot metal (M) bath surface, in contact with hot metal (M) damage or can be caused clogging, in the present invention, the lower limit value defining the maximum height of the nozzle 110 to the 10cm from hot metal (M) of the bath surface standby.

[58]

Further, is restricted by 15cm from the top side to the lower bath surface height state or refining operation upon stirring the maximum upper limit value of the height of the nozzle 110, to improve the polishing efficiency and desulfurization efficiency, it is to prevent the scattering of the refiner. For example, but located at the lower side of the stirring time or refining the uppermost bath surface of the molten iron at the time of operating the height, if positioned too high, to a height of less than 15cm, the stirring efficiency, the blowing efficiency of the refiner of molten iron is dropped suddenly poor refining efficiency , scattering of refiner becomes worse. Therefore, the present invention is limited to 15cm in height from the top of the molten iron while stirring or refining the maximum upper limit value of the height of the nozzle.

[59]

[60]

Nozzle according to the embodiment 110 is provided as shown, side by side along a virtual line extending in the radial direction and side by side, or in the radial direction of the container (L) shown in Fig. That is, the nozzle 110, the nozzle 110 is provided so that the side-by-side along a virtual line extending in the radial direction and side by side, or in the radial direction of the container. If this in other words, the nozzle 110 is provided in contact with the outer surface of the container (L) achieve an extension (A) and vertically extending in the width direction of the container (L). If other words, is provided with the front end of the nozzle 110 is blown to the refiner toward the center of the diameter of the container (L).

[61]

Said container in contact with the outer surface of the first, such as a modified example, the nozzle 110 and the container (L) shown in the present invention is not limited to the embodiment shown in the installation direction of Fig. 2 of the nozzle 110, Fig. 3 ( L) becomes the inclined extension (angle (θ), a) forming the extension in the lateral direction so that the obtuse angle or acute angle, may be installed to be inclined in a direction corresponding to the direction of rotation of the impeller 210. According to the first modified example, and the effect of the blow the desulfurizing agent from the nozzle 110, which is blown in a direction corresponding to the direction of rotation of the impeller 210, the rotational stirring force of the molten iron (M) improved as compared to the embodiment , whereby the desulfurization efficiency is improved compared to the prior art.

[62]

Further, another example, as in a second modification shown in Figure 4, the nozzles 110, each forming an extension line (A) extending in the transverse direction of the container (L) in contact with the outer surface of the container (L) (θ) is jidoe inclined such that an obtuse angle or an acute angle, may be installed to be inclined in a rotational direction opposite to the direction of the impeller 210. In this case, the stirring force is compared with the second modification is low, but, since the input direction of the refiner rotates in the opposite direction of the impeller 210, the conflict in accordance with the stirred flow is generated. Thus, in the case where the CaO-based desulfurizing agent, there is formed a film CaS on the surface of the desulfurizing agent by the reaction of the hot metal (M), the desulfurizing agent is so CaS film is peeled as the collision and the hot metal (M), refiner that is, the CaO exposed again Since participating in hot metal (M) desulfurization, the desulfurization efficiency is improved. In addition, since the refiner is distributed by the above-described collision, the desulfurization efficiency is improved becomes wider surface area.

[63]

[64]

The following describes a hot metal treatment method using a hot metal treatment apparatus according to an embodiment of the invention. At this time, the used desulfurizing agent as a refiner, and will be described for the process for desulfurizing hot metal (M) for example.

[65]

First, a hot metal desulfurization and character (M) to the container for example, and take on a ladle, to transport molten iron to refining treatment location. Thereafter, an inert gas such as nitrogen gas into the supply line 150, the nozzle 110 via, argon, carbon dioxide supply at a predetermined pressure to prevent the molten iron penetrates into the nozzle 110. Thereafter, the immersed (or dipped) into the molten iron to rotate the impeller 210 of the agitator 200 and a desulfurizing agent added into the molten iron.

[66]

At this time, the first and then added to the desulfurizing agent in a method of dropping the desulfurizing agent into the container (L) from the upper side of the container (L), In the desulfurizing agent through a nozzle (110) in the future. More specifically, hot metal (M) to put into the refiner for a total time of refining the molten iron, when the point at which the polishing is terminated to that 100% of the time, the molten iron (M) refining starting after 10% of the to the time point of more than 15% (that is, the beginning of interval), while increasing the speed of rotation of the impeller (210) up to speed after the input the refiner, and from the top of the container (L) then added to the desulfurizing agent from the nozzle 110 ( see Fig. 5).

[67]

In the method for injection of the desulfurizing agent, but step-by-step by dividing the input through the container 110 and the upper side, the nozzle 110, and the desulfurizing agent amount to be added for the desulfurizer it may be introduced through the nozzle 110. The

[68]

By the input of this desulfurizing agent, in the container (L) the desulfurization is carried out in response to the hot metal and sulfur (S).

[69]

To do this, in the present invention, the molten iron top bath surface height (H during standby 1 ) upper side, hot metal (M) stirred during hot metal (M) the top bath surface height (H in the second the desulfurizing agent through a nozzle 110 installed at a lower side position) by injection, depending on the hot metal (M) improves the dispersion of the desulfurizing agent as compared with the conventional inside, reactivity is enhanced, and thus can improve the desulfurization efficiency than when added to the desulfurizing agent only on the upper side of the container 110 as in the prior art have.

[70]

Accordingly, it is possible to reduce the consumption of the desulfurizing agent and the processing time required to keep up with the target sulfur (S) concentration.

[71]

[72]

Hereinafter will be described by comparing the results of hot metal desulfurization process by the processing method according to an embodiment and comparative examples of the present invention.

[73]

For the experiment, the first to third embodiment and a comparative example was used as a molten iron having a composition the same components. Further, the desulfurization was carried out in otherwise the desulfurization conditions as shown in Table 1 below.

[74]

First and hot metal treatment process according to the first embodiment is only the desulfurizing agent is added from the top of the nozzle 110, desulfurizing agent will blow is made, the molten iron processing method vessel (L) according to the comparative example using according to an embodiment of the present invention, from the nozzle 110 it is not made the desulfurizing agent blown.

[75]

TABLE 1
First Embodiment Second Embodiment Third Embodiment Comparative Example
Desulfurizing the total amount (kg / ton) 8 8 7 8
Desulfurizing the input of the upper vessel (kg / ton) 4 0 3.5 8
Desulfurizing the input through the nozzle (kg / ton) 4 8 3.5 -
The rotational speed of the impeller (rpm) 150 150 150 150
Processing time (min) 20 20 18 20
The final sulfur (S) concentration (% by weight) 0.0032 0.0027 0.0035 0.0052

[76]

[77]

As it is shown in Table 1, the first to the lower than to the third embodiment in that the concentration of sulfur (S) of desulfurizing molten iron in the treated molten iron processing method according to Comparative Example. Thereby, the molten iron processing apparatus including a nozzle 110 according to the present invention has a high desulfurization rate can be seen as compared to the conventional hot metal treatment apparatus.

[78]

In addition, the concentration of a second embodiment of sulfur (S) for injection as compared to the first embodiment of the blown by dividing the desulfurizing agent from the upper side and the nozzle (110) of the container (L), a desulfurizing agent both through the nozzle (110) low. This is because the rotating force deohaejyeo by desulfurizing agent is blown from the nozzle 110 to the rotational force of the impeller 210 is higher than that of the comparative example the stirring power of the overall molten iron.

[79]

Then, the third embodiment, if the total amount of desulfurizing agent Less than 13% of the comparison example, showing a low sulfur (S) concentration compared to the comparative example even though the processing time reduced by 10%-rescue. Therefrom by a desulfurizing agent added through the nozzles 110 in accordance with an embodiment of the present invention, it can be seen that the effect of reducing the amount and the processing time compared to conventional desulfurizing agent.

[80]

[81]

In this way and through the side wall of the container (L) in the embodiments of the present invention, is higher than the bath surface height of the hot metal (M) when the stirring before the stand-by state of the impeller 210, with a maximum speed impeller 210 by installing a nozzle 110 at a position lower than the top of the bath surface height when in the rotated state, and inputs the refiner. Thus, there is an effect that, to reduce the use and refining time of the refiner according to the polishing efficiency is improved when compared to the input refiner in the upper container (L), as in the prior art.

Industrial Applicability

[82]

According to the hot metal processing device and a hot metal treatment process according to the invention, and passes through the side wall of the container, is higher than the bath surface height when the stirring before the standby state of the impeller, molten iron, when the state in which the impeller is rotated at a maximum speed by installing a nozzle at a position lower than the top of the bath surface height, the commitment the refiner. Thus, there is an effect that, to reduce the use and refining time of the refiner according to the polishing efficiency is improved when compared to the input refiner in the upper container, as in the prior art.

Claims

[Claim 1]

The course of the vessel chartered as possible; And to be charged, and rotation into said vessel, is immersed within the molten iron the vessel equipped with a stirrer having an impeller for agitating the molten iron; is installed so as to penetrate through the side wall of the container in the radial direction of the container, wherein the inside hot metal the container when the state it was in before the impeller is immersed, is higher than the bath surface height of the molten iron, when the state is the impeller is immersed rotated within the molten iron the vessel, is provided so as to be positioned lower than the top of the bath surface height of the molten iron, wherein hot metal treatment apparatus including; refiner injector having a nozzle for blowing a refiner for refining molten iron into the container.

[Claim 2]

The method according to claim 1, wherein the refiner is a feeder, refiner storage unit is stored the refiner; one end coupled to the storage unit refiner, refiner feed line connected to the other end of the nozzle; Hot metal treatment apparatus comprising; and connected to the refiner feed line gas supply line for supplying an inert gas to effect movement of the refiner.

[Claim 3]

The method according to claim 2, wherein the nozzle is in contact with the hot metal process equipment outside face of the container provided to fulfill the extension and vertically extending in the width direction of the container.

[Claim 4]

The method according to claim 2, the nozzle is, Yongsan processing apparatus, each constituting the extension line extending in the width direction of the container is installed is inclined so that an obtuse angle or an acute angle in contact with the outer side of the container and the nozzle.

[Claim 5]

The method according to claim 4, wherein the nozzle is hot metal treatment apparatus, which is installed tilted in the rotational direction or the opposite direction of the impeller.

[Claim 6]

Claim according to any one of claim 1 to claim 5, wherein the nozzle, the chartered upward direction separation distance between the top surface of in the state it was in before the impeller is immersed in the molten iron the container to within the molten iron 10cm or more, the container hot metal treatment unit is downwardly spaced from the top side surface of the hot metal distance in a state in which the installation is located is at least 15cm, which is the impeller rotation immersion.

[Claim 7]

The method according to claim 6, hot metal treatment apparatus wherein the nozzle is provided which is installed opposite to the plurality.

[Claim 8]

The system according to claim 7, wherein the molten iron processing apparatus keyial device (KR; Kanvara reactor), and the refiner is a desulfurizing agent in the molten iron treatment device for removing sulfur (S) of the molten iron.

[Claim 9]

The process of taking the hot metal in the vessel; immersing the impeller in hot metal the container, the process by the rotation operation of stirring the molten iron; process of In the refiner inwardly from the side wall of the container; includes, of the container in sikineunde in the refiner inwardly from the side wall, when the state it was in before the impeller is immersed in the vessel hot metal, is higher than the bath surface height of the molten iron, when the state is the impeller is immersed rotated within the molten iron the container , hot metal processing method to which the refiner is put in a position lower than the top of the bath surface height of the molten iron.

[Claim 10]

The method according to claim 9, in sikineunde In the refiner inwardly from the side wall of the container, by blowing the inert gas with the refiner moving the refiner hot metal processing method for input into said vessel.

[Claim 11]

The method according to claim 10, in according to input a refiner inwardly from the side wall of the container, the upward direction separation distance between the top surface of the molten iron in before the impeller is immersed in the molten iron the vessel conditions than 10cm, the container the molten iron to the molten iron treatment in the refiner at a position downwardly spaced apart from the distance to the uppermost surface of the molten iron at least 15cm in the state in which the impeller is immersed in the rotation.

[Claim 12]

The method according to claim 10, in sikineunde In the refiner inwardly from the side wall of the container, the molten iron wherein the refiner is to be introduced is discharged through the extension and the nozzle is installed to fulfill the vertical extension in contact with the outside face of the casing in the width direction of the container method.

[Claim 13]

The method according to claim 10, in sikineunde In the refiner inwardly from the side wall of the container, wherein the refiner is provided at the side wall of the container, each of the obtuse angle contact with the outside the container side forming the extended line extending in the width direction of the container in the molten iron processing method through a nozzle installed inclined or in an acute angle.

[Claim 14]

The method according to claim 13, in sikineunde In the refiner inwardly from the side wall of the container, the nozzle is installed tilted in the rotational direction or the opposite direction of said impeller, a refiner in a direction or in the opposite direction corresponding to the direction of rotation of the impeller hot metal treatment method of the input.

[Claim 15]

The method according to claim 9, hot metal treatment process comprising the step of put the refiner from the top of the container before turning the refiner inwardly from the side wall of the container.

[Claim 16]

The method according to claim 15, relative to the total time to put into the refiner to the molten iron refining the molten iron, when the point at which the polishing is terminated to that 100% of the time, the reservoir to the point of 10% or less after the polishing start of the molten iron from the time to inject the refiner from the top, and the excess of 10% of the molten iron processing method in the refiner inwardly from the side wall of the container.

[Claim 17]

A method according to any one of claim 9 to claim 16, wherein the refiner is a desulfurizing agent in the molten iron treatment method for removing sulfur (S) of the molten iron.