WO2015020262A1 - 용탕의 정련 방법 및 그 장치 - Google Patents
용탕의 정련 방법 및 그 장치 Download PDFInfo
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- WO2015020262A1 WO2015020262A1 PCT/KR2013/008535 KR2013008535W WO2015020262A1 WO 2015020262 A1 WO2015020262 A1 WO 2015020262A1 KR 2013008535 W KR2013008535 W KR 2013008535W WO 2015020262 A1 WO2015020262 A1 WO 2015020262A1
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- WIPO (PCT)
- Prior art keywords
- molten metal
- blade
- impeller
- refining
- liquid
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/06—Constructional features of mixers for pig-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
- C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
Definitions
- the present invention relates to a method and apparatus for refining molten metal, and more particularly, to a method and apparatus for refining molten metal capable of efficiently controlling phosphorus concentration in a ferromanganese molten metal.
- phosphorus (P) is present as an impurity in the steel and deteriorates the quality of steel products, such as causing high temperature brittleness, so it is preferable to lower the content of phosphorus (P) in the steel except in special cases.
- the Tallinn operation to remove phosphorus (P) in the ferro-manganese molten metal is carried out.
- the general impeller 20 as shown in Figure 9, the impeller body 21 extending in the vertical direction, a plurality of blades 22, a plurality of blades 22 connected to the outer peripheral surface of the lower portion of the impeller body 21
- a flange 25 connected to the top of the body 21. And the flange 25 is connected to the drive (not shown) for providing rotational power.
- the flow descending again on the inner wall of the ladle 10 is generated by the rotation of the blade 22 to provide the ladle 10. It collides with the stirring stream rising up the inner wall. The agitation force is canceled by the collision of the flow, which reduces the reaction rate between the molten metal and the dephosphorization agent, thereby reducing the dephosphorization rate.
- the present invention provides a method and apparatus for refining molten metal capable of improving the stirring efficiency of the molten metal and improving the dispersibility of the dephosphorizing agent introduced into the molten metal.
- the present invention provides a method and apparatus for refining molten metal which can efficiently control the phosphorus (P) concentration in the molten metal.
- the present invention provides a method and apparatus for refining molten metal that can increase the dephosphorization efficiency by suppressing the temperature drop of the molten metal.
- an apparatus for refining molten metal comprising: an impeller extending upward and downward in an upper portion of a container in which the molten metal is charged; And a liquid dephosphorization agent supplying unit provided at an upper portion of the vessel to supply a liquid dephosphorization agent in a molten state to the upper portion of the molten state, wherein the impeller includes: an impeller body; A blade provided on an upper outer circumferential surface of the impeller body; A supply pipe provided in the impeller body along a length direction of the impeller body and supplied with a solid dephosphorizer and a conveying gas in a powder state; And a blowing nozzle passing through a portion of the lower part of the impeller body and communicating with the supply pipe.
- the blade may be located in an upper region of a half point with respect to the total depth of the molten metal, and the blow nozzle may be located in a lower region of a half point with respect to the total depth of the molten metal.
- the blade may be disposed in an area of 10 to 30% from the molten surface of the molten metal with respect to the total depth of the molten metal.
- the liquid dephosphorizer supply unit may be connected to a discharge pipe having a heater for heating the liquid dephosphorizer.
- the blade may have an upper width longer than the lower width.
- the upper width of the blade may be formed 5 to 20% longer than the entire length of the lower width.
- the blade may be formed to have a width of 35 to 45% with respect to the inner diameter of the ladle.
- the blade may be provided with a plurality of spaced apart around the impeller body, the inclined surface may be formed on at least one side facing the adjacent blade.
- One side of the blade may be formed to be inclined with an angle of 10 ⁇ 30 ° with the top surface of the blade.
- a refining method of the molten metal the method of refining the molten metal, the process of preparing a molten metal; Immersing an impeller in the molten metal; Supplying a liquid dephosphorizer to the upper portion of the molten metal; And rotating the impeller to agitate the molten metal.
- a solid phase dephosphorizer in a powder state may be supplied through a lower portion of the impeller.
- the slag generated in the previous process can be excluded.
- the blade of the impeller In the process of immersing the impeller, the blade of the impeller is disposed in the upper region of the half point of the total depth of the molten metal, and the blow nozzle of the impeller is arranged in the lower region of the half point of the total depth of the molten metal Can be.
- the blade of the impeller may be disposed in the 10 to 30% area from the molten surface of the molten metal.
- the stirring process may include agitation such that the stirring flow direction of the melt generated by the blade of the impeller and the stirring flow direction of the melt generated by the solid dephosphorization agent blown into the molten metal coincide with each other.
- the stirring flow generated by the blade flows separately in the vertical direction, and the stirring flow area of the molten metal in the lower direction of the blade may be wider than the stirring flow area of the molten metal in the upper direction of the blade.
- the liquid dephosphorization agent supplied to the molten metal may be 50 to 70% by weight based on the total weight of the liquid dephosphorization agent and the solid phase dephosphorization agent.
- an inert gas may be supplied together with the solid dephosphorizer.
- the molten metal may be excluded slag.
- blades and blowing nozzles are provided so as to be separated from the upper and lower sides of the molten metal to improve the dispersibility of the dephosphorizing agent introduced into the molten metal, thereby improving the desalting efficiency.
- the liquid dephosphorizer is introduced into the upper portion of the molten metal contained in the container, and the molten metal is stirred using an impeller having a blade disposed on the upper side of the molten metal.
- FIG. 1 is a view showing a schematic configuration of a molten metal refining apparatus according to an embodiment of the present invention.
- Figure 2 is a cross-sectional view schematically showing the structure of the impeller.
- FIG. 3 is a bottom view of the blade.
- FIG. 4 is a cross-sectional view showing the structure of a blow nozzle.
- FIG. 5 is a flowchart sequentially showing a method of refining molten metal according to an embodiment of the present invention.
- Figure 6 is a graph showing the results of the experiment for the optimization of the Tallinn process by using the molten metal refining apparatus and method according to an embodiment of the present invention.
- FIG. 7 is a graph showing the stirring effect of the debinding agent input method and the position of the blade.
- FIG. 9 is a view showing a schematic configuration of a refining apparatus for molten metal according to the prior art.
- the present invention is a refining apparatus and method of the molten metal, it is possible to control the concentration of elements such as sulfur (S), phosphorus (P) and the like contained in the molten metal by adding an additive in the molten metal.
- S sulfur
- P phosphorus
- the present invention is not limited thereto, and various substances are introduced into the molten metal according to operating conditions. The concentration of various elements contained can be controlled.
- a liquid dephosphorizing agent is added to the upper portion of the molten metal, and a solid dephosphorizing agent is added to the molten steel to stir the steel while stirring the dispersion efficiency of the liquid dephosphorizing agent and the solid phase dephosphorizing agent in the molten metal.
- FIG. 1 is a view showing a schematic configuration of a molten metal refining apparatus according to an embodiment of the present invention.
- a refining apparatus for molten metal is disposed to be movable upward and downward on a ladle 100 in which molten metal and slag are accommodated, and a moving path of a solid dephosphorizer is disposed therein.
- the impeller 200 is formed, and the liquid dephosphorizer supply unit 300 for injecting the liquid dephosphorization agent into the upper portion of the molten metal charged in the ladle 100 on the ladle 100.
- the refining apparatus of the molten metal is supplied to the upper portion of the molten metal contained in the ladle 100 through the liquid dephosphorizer supplying unit 300, and while stirring the molten metal while supplying a powdered solid dephosphorizer into the molten metal through the impeller
- the concentration of phosphorus in the molten metal can be controlled.
- Figure 2 is a cross-sectional view schematically showing the structure of the impeller
- Figure 3 is a bottom view of the blade
- Figure 4 is a cross-sectional view showing the structure of the blow nozzle.
- the impeller 200 is a stirrer for stirring the molten metal accommodated in the ladle 100 and the liquid and solid dephosphorizing agent introduced for refining the molten metal.
- the impeller 200 is provided in the impeller body 210, the lower portion of the impeller body 210, the blowing nozzle 230 for injecting the solid dephosphorizer and the transfer gas into the molten metal, a plurality of blades mounted on the outer peripheral surface of the impeller body 210 220.
- the flange 250 connected to the upper end of the impeller body 210 on the upper side of the plurality of blades 220, is formed to penetrate the inside of the impeller body 210 in the vertical direction, additives and gas to the blow nozzle 230 It includes a supply pipe 240 for supplying.
- the impeller 200 may be installed outside the ladle 100 to be connected to a separate drive unit (not shown), for example, a motor that provides rotational force, and preferably through an upper portion of the flange 250 of the impeller 200. It may be connected to the impeller body 210.
- Impeller body 210 is a rotation axis or main axis of the impeller 200, is formed extending in the longitudinal direction or vertical direction, it may be installed to extend so as to be immersed from at least the molten surface of the molten metal to the lower region of the molten metal. More specifically, the impeller body 210 is installed so that the upper end protrudes to the upper side of the slag and the lower end extends to the lower region of the molten metal, such that the lower end of the impeller body 210 is adjacent to the bottom surface of the ladle 100. Can be arranged.
- the impeller body 210 may have a rod shape having a circular cross section, but is not limited thereto, and may have a rod shape having various cross sections that are easy to rotate.
- a flange 250 may be connected to an upper portion of the impeller body 210, and the flange 250 may be connected to a driving unit (not shown) that provides rotational force.
- the impeller body 210 is rotated by the operation of the drive unit, the blade 220 is also rotated by the rotation of the impeller body 210.
- the supply pipe 240 communicates with the blow nozzle 230 provided below the impeller body 210 and is used as a moving path of the solid dephosphorizer sprayed through the blow nozzle 230.
- the supply pipe 240 is also used as a moving path of the conveying gas for conveying and spraying the solid dephosphorizer to the blowing nozzle (230).
- only the transfer gas may be transferred through the supply pipe 240 to be injected into the blowing nozzle 230.
- the supply pipe 240 is formed to penetrate the inside of the flange 250 and the impeller body 210 in the vertical direction. It is formed to penetrate the inside of the body 210 in the vertical direction.
- the supply pipe 240 according to the embodiment has a hole shape formed by processing the inside of the flange 250 and the impeller body 210, but is not limited thereto.
- a pipe having an internal space may be the flange 250 and the impeller body 210. ) May be installed to be inserted into the inside.
- the upper end of the supply pipe 240 may be connected to the tank in which the solid dephosphorizer and the transport gas in powder form, respectively, and the lower end is in communication with the blow nozzle 230 provided under the impeller body 210.
- the inner cross-sectional area of the supply pipe 240 may be formed to have the same or substantially similar size as the inner cross-sectional area of the blow nozzle 230 connected to the supply pipe 240. That is, the plurality of blowing nozzles 230 may be in communication with the supply pipe 240, and when the cross-sectional area of the supply pipe 240 is too small than the cross-sectional area of the blowing nozzles 230, the solid dephosphorization agent through the supply pipe 240.
- the amount of the solid dephosphorization agent discharged through the plurality of blowing nozzles 230 is insufficient because the conveyance of the liquid is not smooth or the amount is small, and when the amount of the solid dephosphorization agent is excessively large, the solid dephosphorization is carried out through the blowing nozzle 230. I may not discharge smoothly.
- Blowing nozzle 230 blows solid dephosphorization agent and conveying gas into the molten metal.
- Blowing nozzle 230 is provided in the lower portion of the impeller body 210, it is effective to be spaced apart as far as possible from the blade 220 is installed on the top.
- the blow nozzle 230 is adjacent to the bottom surface of the ladle 100, and the blade 220 is installed to be adjacent to the molten surface of the molten metal.
- the blow nozzle 230 is configured separately from the blade 220, it is located in the lower region of the molten metal accommodated in the ladle (100).
- blowing nozzle 230 is preferably formed in a direction intersecting the direction in which the impeller body 210 is extended (extending in the vertical direction).
- Blowing nozzle 230 according to the embodiment is formed to extend in the left and right direction of the impeller body 210, branched in a plurality of directions around the supply pipe 240 penetrating the center of the impeller body 210 in the vertical direction It is formed to be.
- the number of blown nozzles 230 branched may be provided in a number corresponding to the number of the plurality of blades 220, or may be provided in a number less than or more than the number of blades 220.
- Blowing nozzle 230 is a hole shape (branch) branched in the left and right direction around the supply pipe 240 by processing the interior of the impeller body 210, but not limited to this, having a thin inner space
- the pipe may be inserted into the lower part of the impeller body 210.
- the blow nozzle 230a may be formed in a direction intersecting with the supply pipe 240, for example, a direction orthogonal to each other, to spray the solid dephosphorizer into the molten metal in a horizontal direction.
- the blow nozzle 230b is formed to be inclined downward, it is possible to discharge the solid dephosphorization agent transferred through the supply pipe 240 to be inclined downward in the molten metal. Accordingly, the solid dephosphorization agent discharged from the blow nozzle 230b may be easily diffused to the lower portion of the molten metal.
- the solid dephosphorizer which is transferred through the supply pipe 240 and sprayed to the blow nozzle 230 is an additive for removing phosphorus (P) component in the molten metal, and is BaCO 3 , BaO, BaF 2 , BaCl 2 in powder form. It may include at least one of, CaO, CaF 2 , Na 2 CO 3 , Li 2 CO and NaF.
- the solid phase dephosphorizing agent may be BaCO 3 -NaF system.
- the conveying gas which is conveyed through the supply pipe 240 and injected through the blow nozzle 230 is used to suppress or prevent the blockage of the blow nozzle 230 and to stir the melt, and does not react with the melt and the solid phase dephosphorizer. May be an inert gas such as argon (Ar), nitrogen (N 2 ), or the like.
- the blade 220 mechanically stirs the molten metal charged into the ladle 100 to disperse or diffuse the liquid dephosphorization agent and the solid phase dephosphorization agent introduced into the molten metal.
- the blade 220 is installed to be spaced apart from the blow nozzle 230 in the upper portion of the impeller body (210). That is, the blade 220 is located in the upper region of the molten metal accommodated in the ladle 100, and is separately configured to the blow nozzle 230.
- the upper surface of the blade 220 may be installed to be adjacent to the molten metal of the molten metal.
- the blade 220 is provided in plural and connected to the outer circumferential surface of the upper portion of the impeller body 210, the plurality of blades 220 are spaced apart at equal intervals from the outer circumferential surface of the impeller body 210.
- the plurality of blades 220 may be disposed, for example, in a cross shape, with the impeller body 210 interposed therebetween to maximize agitation efficiency, and may be disposed to face each other with respect to the impeller body 210.
- the blade 220 may have an upper width Wu greater than the lower width Wb to form a flow of the molten metal from the upper portion of the molten metal to the lower portion of the molten metal (Wu> Wb).
- the upper width (Wu) means the length from one side to the other side from the upper surface of the blade
- the lower width (Wb) means the length from one side to the other side from the lower surface of the blade
- the blade 220 rotates the blade ( It is equal to the diameter of the circle formed on the top and bottom of 220.
- the blade 220 may form the upper width (Wu) of about 5 to 20% of the upper width than the lower width (Wb), wherein the lower width (Wb) is larger than the diameter (D) of the impeller body (210) .
- the surface 220a facing the side of the blade 220 connected to the impeller body 210 may be formed to be inclined downward.
- the side surface 220b facing the adjacent blade in the blade 220 may be formed as a slope inclined downward. This may implement the effect of pushing the molten metal downward when the blade 220 is rotated to allow the molten metal to flow downward.
- the inclined surface formed on the side of the blade 220 may be formed on both sides of the blade 220, but may also be formed only on the side disposed in the rotation direction of the impeller 200.
- the side of the blade 220 may form an angle of about 10 to 30 degrees with the upper surface of the blade 220.
- the width of the blade 220 may occupy about 35 to 45% of the inner diameter of the ladle 100.
- the height of the blade 220 may be formed in a length of about 25 to 35% with respect to the upper width of the blade 220. If the height of the blade 220 is longer than the range presented, the contact area between the blade and the melt is increased to increase the power required to rotate the impeller 200 compared to the stirring effect, and if it is shorter than the presented range, the stirring efficiency of the melt is lowered. There is a problem that can be.
- the blade 220 is formed to be located within 50%, more preferably within a range of 10 to 30% of the molten metal (excluding liquid dephosphorization agent) when the impeller 200 is immersed in the molten metal charged into the ladle 100. It is good to be. This will be described again in the molten metal treatment method.
- the blow nozzle 230 is disposed in the lower region of the molten metal, and the blade 220 is separately installed so as to be located in the upper region of the molten metal, and the blade 220 and the blow nozzle 230 are spaced apart as far as possible. It is effective to be located.
- the installation position of the blow nozzle 230 and the blade 220 according to an embodiment of the present invention will be described in detail with reference to the following.
- H the depth of the molten metal accommodated in the ladle 100 as shown in FIG. 2
- H distance from the bottom surface of the ladle 100 to the upper surface (hot surface) of the molten metal
- the blowing nozzle 230 is located in the lower region of the 1/2 point (1 / 2H) of the depth H of the molten metal relative to the bottom surface of the ladle 100, the blade 220 of the depth H of the molten metal It is installed so as to be located in the upper region of the 1/2 point (1 / 2H). More preferably, the blow nozzle 230 is located in the lower region of 3/10 of the depth H of the melt relative to the bottom surface of the ladle 100, and the blade 220 is 7/10 of the depth H of the melt.
- the blade 220 is located in an area (direction adjacent to the molten surface) within 3/10 of the molten surface, and exceeds 7/10.
- Blowing nozzle 230 is located in the region (direction adjacent to the bottom surface of the ladle 100).
- the liquid dephosphorizer supplying unit 300 is provided on the ladle 100 to supply a high temperature liquid dephosphorizer to the upper portion of the molten metal in the ladle 100.
- the liquid dephosphorizer supply unit 300 includes a melting furnace to melt the solid dephosphorizer.
- the liquid dephosphorizer supplying unit 300 may be provided with a switch for supplying and blocking a liquid dephosphorization agent in a molten state and controlling a supply amount.
- the switch may be implemented in various forms such as a valve, a stopper, a sliding gate, and the like.
- the liquid dephosphorizer supply unit 300 may be connected to the discharge pipe 400 for supplying the liquid dephosphor agent discharged from the melting furnace to the molten state at a high temperature.
- the discharge pipe 400 may be provided with a heater (not shown) for heating the liquid dephosphorization agent transported along the inside of the discharge pipe 400, the heat discharge material (not shown) in the discharge pipe 400 to suppress the temperature drop of the liquid dephosphorization agent ) May be provided.
- the molten metal refining apparatus by supplying a high temperature liquid dephosphorization agent to the upper portion of the molten metal, stirring the molten metal while discharging the solid dephosphorization agent in the molten metal, the temperature of the molten metal is suppressed and the dephosphorization agent is removed. Can be dispersed quickly and uniformly in the melt.
- the phosphorus component contained in the molten metal can be easily controlled to produce a molten metal of high quality.
- FIG. 5 is a flowchart sequentially showing a method of refining molten metal according to an exemplary embodiment of the present invention.
- the molten ferromangan molten metal produced in the electric furnace is tapped with the ladle 100 and then heated in a ladle furnace facility, and then moved to an operation place for Tallinn.
- the operation place for Tallinn is provided with an impeller for stirring the molten metal and a liquid dephosphorizing agent supply unit 300 for injecting the dephosphorizing agent into the molten metal.
- the liquid dephosphorizer supply unit 300 may add a liquid dephosphorization agent in which the solid dephosphorization agent is melted.
- the liquid dephosphorizer in the melting furnace is constantly discharged by using the switch of the liquid dephosphorizer supply unit 300 to be injected into the upper portion of the molten metal through the discharge pipe 400 (S130).
- the impeller is rotated to stir the melt (S140).
- the supply gas and the solid dephosphorization agent are supplied through the supply pipe 240 of the impeller and discharged in the molten metal by the blowing nozzle (S150).
- the liquid dephosphorization agent may add about 50 to 70% of the total weight of the dephosphorization agent (solid dephosphorization agent and liquid dephosphorization agent) which is added for dephosphorization of the molten metal.
- the amount of liquid dephosphorization agent is less than the indicated range, the temperature of the molten metal decreases due to the increase of the amount of solid phase dephosphorizer, and if the amount of the liquid dephosphorization agent is more than the indicated range, the temperature decrease of the melt can be suppressed, but the dephosphorization efficiency is further increased There is a problem that they do not or are insignificant.
- the rotation of the impeller is stopped and raised to take out the impeller from the molten metal (S160), and then the slag generated during the delineation process (S170).
- the stirring of the molten metal may be performed for about 5 to 20 minutes. If the molten metal is stirred for a shorter time than the suggested time, the dephosphorization effect of the molten metal is lowered. In addition, the temperature of the molten metal is lowered and the dephosphorization efficiency is lowered, as well as a separate process for raising the temperature of the dephosphorized molten steel in a subsequent process has to be performed.
- the liquid dephosphorizer is introduced through the upper part of the molten metal, the solid dephosphorizer is introduced into the molten metal, and when the impeller is rotated, the liquid dephosphorizer is decomposed into fine droplets by the rotation of the impeller and moved from the upper part to the lower part. It is dispersed while, and the solid dephosphorizer is dispersed while moving from the lower side of the molten metal to the upper side.
- the blowing nozzle is formed in the lower portion of the molten metal to form a flow of the molten metal from the lower portion of the molten metal and The dispersion efficiency of a solid phase dephosphorization agent can be improved.
- the blade 220 rotates together with the impeller body 210. And, as shown in Figure 1, the flow of agitation (solid arrow) caused by the rotation of the blade 220 is generated in the direction of the inner wall of the ladle 100 from the blade 220 and collided, ladle 100 ) The inner wall flows in a vertical direction. At this time, since the blade 220 is located adjacent to the hot water surface, the area of the stirring flow of the molten metal in the lower direction of the blade 220 is larger than the area of the stirring flow of the molten metal in the upper direction of the blade 220.
- a part of the ladle 100 moves upward in the inner wall, and then the outer peripheral surface of the impeller body 210 and the blade 220 through the liquid dephosphorization agent on the upper side of the hot water surface. Descend and climb again. And the other part is moved to the lower side of the inner wall of the ladle 100 to descend to the lower end of the inside of the ladle 100, and rises again on the outer circumferential surface of the impeller body 210 located under the blade 220.
- the liquid dephosphorization agent in the upper portion of the molten metal is dispersed while moving downward along the flow of the molten metal.
- both sides of the blade 220 that is, the surface adjacent to the blade 220 is formed to be inclined downward to press the molten metal during rotation to further accelerate the flow of the molten metal in the downward direction to promote the dispersion of the liquid dephosphorization agent You can.
- the solid dephosphorizing agent and the conveying gas discharged through the blowing nozzle 230 have a small specific gravity, the solid dephosphorizing agent and the conveying gas are directly raised on the outer circumferential surface of the impeller body 210, and then the upper portion of the molten metal is rotated by the rotation of the blade 220 positioned above.
- the area descends while flowing in the direction of the inner wall of the ladle 100, and ascends on the outer circumferential surface of the impeller body 210 again (dashed arrow). And the molten metal also stirs and flows by the stirring flow of such a liquid dephosphorization agent, a solid phase dephosphorization agent, and gas.
- a liquid dephosphorization agent such as a liquid dephosphorization agent, a solid phase dephosphorization agent, and gas.
- the flow by the solid dephosphorization agent and the gas and the flow by the blade 220 described above are flows in the same direction or in the same direction, they are joined together to improve the stirring force.
- the blade 22 is installed under the impeller body 21, and the blowing nozzle 23 is provided on the blade 22. That is, in the conventional impeller 20, the blade 22 and the blowing nozzle 23 are not separated.
- the stirring flow of the molten metal generated by the rotation of the blade 22 occurs in the direction of the inner wall of the ladle 10 and collides with the inner wall of the ladle 10. The ride flows in a vertical direction.
- Figure 6 is a graph showing the results of the experiment for the optimization of the delineation process using the molten metal refining apparatus and method according to an embodiment of the present invention.
- a delineation process was performed using a decoating agent of BaCO 3 -NaF system. After the dephosphorization process, the temperature of the FeMn molten metal, the input unit of dephosphorization agent (liquid dephosphorization agent and solid dephosphorization agent), the input ratio of the liquid dephosphorization agent, and the dephosphorization efficiency factor of the ferromangan melt were analyzed.
- Solid phase dephosphorization agent was introduced into the molten metal by argon gas as a transfer gas, and the liquid dephosphorization agent was melted by using an indirect heating method using a silicon carbide (SiC) heating element and then melted to the upper portion of the molten metal. Input.
- SiC silicon carbide
- the ladle 100 containing the delineated molten steel was moved to a sampling site, and then the temperature of the molten steel was measured after desalination, and a specimen (second specimen) was collected. After that, the ladle 100 was transferred to the main processing plant, and the Tallinn experiment was terminated by performing the main processing using the arranging apparatus.
- ICP Inductively Coupled Plasma Spectrometry
- Figure 6a is a graph showing the relationship between the real ratio and the temperature of the melt according to the input ratio of the liquid dephosphorization agent. It can be seen that the temperature of the molten metal decreases with the temperature of the molten metal measured before the treatment of delineation as the ratio of the liquid dephosphorizing agent increases. That is, it can be seen that the temperature of the molten metal is measured as the ratio of the liquid dephosphorizing agent increases. In addition, the error rate of the molten metal increases as the ratio of the liquid dephosphorizing agent increases.
- the melt error rate (approximately 90%) when only the liquid dephosphorization agent is added is about 10 compared to the melt error rate (approximately 80%) when the solid dephosphorization agent is added only. It can be seen that the percentage is high.
- the melt error rate is very sensitive to the temperature of the melt after the Tallinn process.
- the error rate of the molten metal when the temperature of the molten metal after the Tallinn was 1280 ° C. was found to be 80 to 90%.
- the error rate of molten metal at a low temperature of about 1270 ° C. after the dephosphorization was about 10 ° C. was 65-75%, and the melting error rate decreased as the temperature of the melt decreased. Therefore, in order to improve the melt error rate, it is necessary to thoroughly manage the temperature of the molten metal before and after the Tallinn process.
- FIG. 6B is a graph showing the raw unit of dephosphorization efficiency and dephosphorization agents (liquid dephosphorization agent and solid dephosphorization agent) according to the dephosphorization ratio of the liquid dephosphorization agent.
- the Tallinn efficiency represents the difference between the phosphorus component (P i ) in the initial molten metal and the phosphorus component (P f ) in the molten metal after the Tallinn treatment.
- the amount of the liquid dephosphorization agent is in the range of 0.5 to 0.7, that is, about 50 to 70% of the liquid dephosphorization agent is added to the total weight of the dephosphorization agent, the dephosphorization efficiency is best exhibited.
- the Tallinn efficiency is lowered.
- the input unit of the dephosphorizing agent is 119.8kg / 1 ton (mold) and the same amount of dephosphorizing agent is added (119.7kg / 1 ton (molten metal))
- the Tallinn efficiency is the best.
- the same amount of water is added to the first to sixth containers of the same size, and thymol (C 10 H 14 O) having an equilibrium distribution ratio of water and oil of 350 or more is added to each container.
- the solution was dissolved to simulate the phosphorus component in the molten metal.
- the impeller is immersed in water and subjected to rotary stirring at a constant speed.
- the paraffin oil corresponding to the liquid dephosphorizer was fed over the water.
- a valve for turning on / off the discharge of the paraffin oil and a valve for controlling the supply speed were used.
- the position for supplying paraffin oil was composed of about 25% of the outside of the upper radius of the vessel in consideration of the position of the dephosphorizer discharge pipe of the actual process.
- Paraffin oil and nitrogen gas were blown through the blowing nozzle of the impeller instead of powder. This experiment is to investigate the stirring effect of water and paraffin oil. It is also possible to spray liquid paraffin oil through the blowing nozzle. Paraffin oil was supplied with 10.8 liters of water for 10 minutes to simulate 100 kg / ton.FeMn of raw agent delineating agent. And the rotational speed of the impeller was set to 120rpm, the flow rate of nitrogen gas as the transport gas was applied at 120liter / min.
- Table 1 Liquid dephosphorization Solid phase dephosphorization Blade position (located from the floor) Experimental Example 1 input input 70% Experimental Example 2 input input 20% Experimental Example 3 Not input input 70% Experimental Example 4 Not input input 20% Experimental Example 5 input Not input 70% Experimental Example 6 input Not input 20%
- the experiment was performed by changing the experimental conditions as shown in the above table to see the stirring effect according to whether the liquid dephosphorizer and the solid dephosphorizer were added and the position of the blade.
- the thymol analysis in water was performed and analyzed using the mass transfer equation as follows.
- the overall reaction rate is the flow rate due to the thymol diffusion rate in the mass transfer resistant layer present on the water phase side. This mass transfer equation is shown in Equation 1.
- Equation 1 Equation 1
- Equation 3 can be derived.
- Cw 0 is the initial concentration of thymol on the water side
- C o , C w are the oil-side thymol concentration and the water-side thymol concentration at some time (t), respectively.
- Equation 4 Equation 4
- Equation 5 is derived by integrating Equation 4.
- the value of the mass transfer variable K w A can be obtained from Equation 5, and it can be seen that the mass transfer rate is increased when the mass transfer variable has a high value. That is, the larger the K w A, the wider the reaction interface between the molten metal and the dephosphorizing agent, and the higher the reactivity due to stirring.
- Figure 7 is a graph showing the stirring effect of the debinding agent input method and the position of the blade.
- the reaction efficiency of the solid dephosphorization agent supply method through the blowing nozzle is better than the liquid dephosphorization agent supply method when the blade is disposed in a deep position, and the liquid dephosphorization agent supply method is used when the blade deposition position is shallow. It can be said that the reaction efficiency is better than the method.
- the reaction efficiency is superior to that of using the solid phase dephosphorization agent or the liquid dephosphorization agent supply method alone regardless of the position of the blade.
- the shallower the immersion depth of the blade is, the more advantageous.
- the deeper the immersion depth of the blow nozzle is advantageous in order to secure the opportunity and time for the dephosphorization agent to react with the phosphorus component contained in the molten metal.
- Table 4 shows the results of the delineation process of the molten metal when only the solid dephosphorizer is added, when only the liquid dephosphorizer is added, and when the solid dephosphorizer and the liquid dephosphorizer are added together.
- the method and apparatus for refining the molten metal according to the present invention are provided so that the blades and the blowing nozzles are separated on the upper and lower sides of the molten metal, respectively, to improve the dispersibility of the dephosphorizing agent introduced into the molten metal, thereby improving the dephosphorization efficiency, It can produce molten metal, and can improve the reliability of the produced product using it.
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Abstract
Description
액상 탈린제 투입 | 고상 탈린제 투입 | 블레이드 위치(탕면으로부터 위치) | |
실험 예 1 | 투입 | 투입 | 70% |
실험 예 2 | 투입 | 투입 | 20% |
실험 예 3 | 미투입 | 투입 | 70% |
실험 예 4 | 미투입 | 투입 | 20% |
실험 예 5 | 투입 | 미투입 | 70% |
실험 예 6 | 투입 | 미투입 | 20% |
구분 | 종래기술 | 본 발명 | |
120(ℓ/분) | 최대 유효면적 도달 시간(분) | 6 | 3 |
개선율(%) | 0(기준) | 50% | |
42(ℓ/분) | 최대 유효면적 도달 시간(분) | 9 | 5 |
개선율(%) | 0(기준) | 44% |
고상탈린제투입 비율(%) | 액상탈린제 투입 비율(%) | 시작온도(℃) | 종료온도(℃) | 탈린율(%) | 주선실수율(%) | |
종래기술 | 45.0 | 55.0 | 1379 | 1274 | 66 | 55.7 |
본 발명 | 42.4 | 57.6 | 1376 | 1306 | 73 | 81.9 |
탈린 전 인(P) 농도(%) | 탈린 후 인(P) 농도(%) | ΔT(초기온도-종료온도)(℃) | 탈린율(%) | |
고상 탈린제 | 0.134 | 0.049 | 248 | 65 |
액상 탈린제 | 0.126 | 0.063 | 76 | 52 |
고상 탈린제+액상 탈린제 | 0.140 | 0.037 | 198 | 78 |
Claims (18)
- 용탕을 정련하는 장치로서,용탕이 장입된 용기 상부에 상하 방향으로 연장 형성되는 임펠러; 및상기 용기의 상부에 구비되어 상기 용탕 상부에 용융 상태의 액상 탈린제를 공급하는 액상 탈린제 공급부;를 포함하고,상기 임펠러는,임펠러 몸체와;상기 임펠러 몸체의 상부 외주면에 구비되는 블레이드와;상기 임펠러 몸체의 내부에 상기 임펠러 몸체의 길이 방향을 따라 구비되어, 파우더 상태의 고상 탈린제 및 이송 가스가 공급되는 공급관; 및상기 임펠러 몸체의 하부의 일부를 관통하며 상기 공급관과 연통되는 취입 노즐;을 포함하는 용탕의 정련 장치.
- 청구항 1에 있어서,상기 블레이드는 상기 용탕의 전체 깊이에 대하여 1/2 지점의 상측 영역에 위치하고,상기 취입 노즐은 상기 용탕의 전체 깊이에 대하여 1/2 지점의 하측 영역에 위치하는 용탕의 정련 장치.
- 청구항 2에 있어서,상기 블레이드는 상기 용탕의 전체 깊이에 대하여 상기 용탕의 탕면으로부터 10 내지 30% 영역에 배치되는 용탕의 정련 장치.
- 청구항 1에 있어서,상기 액상 탈린제 공급부에는 상기 액상 탈린제를 가열하는 가열기가 구비된 배출관이 연결되는 용탕의 정련 장치.
- 청구항 1에 있어서,상기 블레이드는 상부폭이 하부폭보다 길게 형성되는 용탕의 정련 장치.
- 청구항 5에 있어서,상기 블레이드의 상부폭은 상기 하부폭보다 상기 상부폭 전체 길이의 5 ~ 20% 길게 형성되는 용탕의 정련 장치.
- 청구항 5 또는 청구항 6에 있어서,상기 블레이드는 상기 래들의 내부 직경에 대하여 35 ~ 45%의 폭을 갖도록 형성되는 용탕의 정련 장치.
- 청구항 5 또는 청구항 6에 있어서,상기 블레이드는 상기 임펠러 몸체를 중심으로 복수개가 이격되어 구비되고, 인접하는 블레이드와 대향하는 적어도 일측면에는 경사면이 형성되는 용탕의 정련 장치.
- 청구항 7에 있어서,상기 블레이드의 일측면은 상기 블레이드의 상부면과 10 ~ 30°의 각도를 가지며 경사지도록 형성되는 용탕의 정련 장치.
- 용탕의 정련 방법으로서,용탕을 마련하는 과정과;상기 용탕에 임펠러를 침지시키는 과정과;상기 용탕의 상부에 액상 탈린제를 공급하는 과정과;상기 임펠러를 회전시켜 상기 용탕을 교반하는 과정;을 포함하고,상기 용탕을 교반하는 과정에서 상기 임펠러의 하부를 통해 분말 상태의 고상 탈린제를 공급하는 용탕의 정련 방법.
- 청구항 10에 있어서,상기 임펠러를 침지시키는 과정 이전에,이전 공정에서 생성된 슬래그를 배재하는 용탕의 정련 방법.
- 청구항 11에 있어서,상기 임펠러를 침지시키는 과정에서,상기 임펠러의 블레이드를 상기 용탕 전체 깊이의 1/2 지점의 상측 영역에 배치시키고,상기 임펠러의 취입 노즐을 상기 용탕 전체 깊이의 1/2 지점의 하측 영역에 배치시키는 용탕의 정련 방법.
- 청구항 12에 있어서,상기 임펠러의 블레이드를 상기 용탕의 탕면으로부터 10 내지 30% 영역에 배치시키는 용탕의 정련 방법.
- 청구항 10에 있어서,상기 교반 과정은 상기 임펠러의 블레이드에 의해 발생되는 용탕의 교반 흐름 방향과 상기 용탕으로 취입되는 고상 탈린제에 의해 발생되는 용탕의 교반 흐름 방향이 일치하도록 교반시키는 과정을 포함하는 용탕의 정련 방법.
- 청구항 10에 있어서,상기 블레이드에 의해 발생된 교반 흐름은 상하 방향으로 분리되어 흐르고,상기 블레이드의 하측 방향에서 용탕의 교반 흐름 면적이 상기 블레이드의 상측 방향에서 용탕의 교반 흐름 면적에 비해 넓은 용탕의 정련 방법.
- 청구항 10 내지 청구항 15 중 어느 하나의 항에 있어서,상기 용탕에 공급되는 액상 탈린제는 상기 액상 탈린제와 고상 탈린제의 총중량에 대하여 50 내지 70중량%인 용탕의 정련 방법.
- 청구항 16에 있어서,상기 고상 탈린제를 공급하는 과정에서 상기 고상 탈린제와 함께 불활성 가스를 함께 공급하는 용탕의 정련 방법.
- 청구항 17에 있어서,상기 용탕을 교반하는 과정 이후에 슬래그를 배재하는 용탕의 정련 방법.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003119509A (ja) * | 2001-10-11 | 2003-04-23 | Nippon Steel Corp | 溶銑予備処理方法及びインペラー装置 |
KR20040053602A (ko) * | 2002-12-17 | 2004-06-24 | 주식회사 포스코 | 용선 탈류효율 향상을 위한 탈류제 투입방법 |
JP2005068506A (ja) * | 2003-08-26 | 2005-03-17 | Sumitomo Metal Ind Ltd | 溶銑の脱硫方法及び脱硫装置 |
JP2007277669A (ja) * | 2006-04-10 | 2007-10-25 | Nippon Steel Corp | 溶銑の脱硫方法 |
JP2010116612A (ja) * | 2008-11-14 | 2010-05-27 | Jfe Steel Corp | 溶銑の脱硫方法 |
Family Cites Families (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4751681B1 (ko) * | 1969-03-15 | 1972-12-26 | ||
JPS491967B1 (ko) * | 1970-03-19 | 1974-01-17 | ||
JPS5236233B2 (ko) | 1972-04-25 | 1977-09-14 | ||
SU539947A1 (ru) * | 1974-04-11 | 1976-12-25 | Уральский научно-исследовательский институт черных металлов | Способ рафинировани расплава |
JPS5277910U (ko) * | 1975-12-08 | 1977-06-10 | ||
JPS5277910A (en) | 1975-12-23 | 1977-06-30 | Westinghouse Electric Corp | Blade equipment connecting 22shaft gas turbine compressor turbine and single stage power turbine |
US4240618A (en) * | 1979-02-23 | 1980-12-23 | Ostberg Jan Erik | Stirrer for metallurgical melts |
FR2461759A1 (fr) | 1979-07-17 | 1981-02-06 | Sofrem | Alliage reducteur a base de silicium et de manganese a haute teneur en silicium, et applications |
US4282032A (en) | 1979-10-30 | 1981-08-04 | Pacific Metals Co., Ltd. | Direct method for production of high-grade, high-purity ferromanganese |
JPS5773107A (en) * | 1980-10-27 | 1982-05-07 | Nippon Steel Corp | Method foe improving dephosphorization efficiency of molten iron |
JPS5798617A (en) * | 1980-12-11 | 1982-06-18 | Nippon Kokan Kk <Nkk> | Dephosphorizing method for molten pig iron |
JPS5838483B2 (ja) * | 1981-03-16 | 1983-08-23 | 新日本製鐵株式会社 | 溶銑処理スラグの吸引除去方法 |
JPS5970706A (ja) * | 1982-10-13 | 1984-04-21 | Nippon Steel Corp | 混銑車内溶銑の予備処理方法 |
JPS5993814A (ja) * | 1982-11-17 | 1984-05-30 | Nippon Steel Corp | 溶銑の脱燐方法 |
JPS60200904A (ja) * | 1984-03-24 | 1985-10-11 | Nippon Kokan Kk <Nkk> | 溶銑の脱燐方法 |
US4662937A (en) | 1984-05-28 | 1987-05-05 | Nippon Steel Corporation | Process for production of high-manganese iron alloy by smelting reduction |
JPS61199011A (ja) * | 1985-02-28 | 1986-09-03 | Nippon Kokan Kk <Nkk> | 溶鋼脱燐法 |
JPS6267148A (ja) | 1985-09-19 | 1987-03-26 | Kobe Steel Ltd | 低りんフエロマンガンの製造方法 |
US4684403A (en) | 1986-06-19 | 1987-08-04 | Elkem Metals Company | Dephosphorization process for manganese-containing alloys |
US4752327A (en) | 1987-05-08 | 1988-06-21 | Elkem Metals Company | Dephosphorization process for manganese alloys |
JP2776043B2 (ja) * | 1991-03-27 | 1998-07-16 | 住友金属工業株式会社 | 溶融金属中への粉体吹込み装置 |
JPH07331313A (ja) * | 1994-06-07 | 1995-12-19 | Kawasaki Steel Corp | 溶融金属の精錬方法および装置 |
US6299828B1 (en) * | 1997-06-26 | 2001-10-09 | C. Edward Eckert | Shaft design for fluxing molten metal |
JP3687433B2 (ja) * | 1999-08-26 | 2005-08-24 | 住友金属工業株式会社 | 溶銑の脱りん方法 |
JP2004068036A (ja) * | 2002-08-01 | 2004-03-04 | Jfe Engineering Kk | 溶銑の脱燐方法 |
JP2006161079A (ja) | 2004-12-03 | 2006-06-22 | Nippon Denko Kk | 副生スラグからのマンガン系合金鉄の製造方法 |
JP4735169B2 (ja) | 2005-09-30 | 2011-07-27 | Jfeスチール株式会社 | 溶銑の脱燐処理方法 |
JP4622800B2 (ja) * | 2005-10-19 | 2011-02-02 | 住友金属工業株式会社 | 機械攪拌方式による溶銑の脱燐方法 |
JP5252670B2 (ja) * | 2007-11-07 | 2013-07-31 | 日新製鋼株式会社 | 溶融金属撹拌用インペラおよびそれを備える溶融金属撹拌装置 |
KR101036321B1 (ko) | 2008-12-26 | 2011-05-23 | 주식회사 포스코 | 페로망간 탈린 장치 및 탈린 방법 |
JP5446300B2 (ja) * | 2009-02-13 | 2014-03-19 | Jfeスチール株式会社 | 溶銑の脱硫処理方法 |
KR101218923B1 (ko) | 2010-09-15 | 2013-01-04 | 한국수력원자력 주식회사 | 유도코일과 용융로 일체형 유도가열식 저온용융로 |
CN102719588A (zh) | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | 一种利用注余热态钢渣对铁水进行渣洗脱硫的方法 |
CN102424879A (zh) | 2011-12-22 | 2012-04-25 | 营口东邦冶金设备耐材有限公司 | 双喷口旋转脱硫喷枪 |
CN202380011U (zh) * | 2011-12-22 | 2012-08-15 | 营口东邦冶金设备耐材有限公司 | 一种双喷口旋转脱硫喷枪 |
-
2013
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- 2013-09-25 JP JP2016532999A patent/JP6445557B2/ja active Active
- 2013-09-25 CN CN201380078762.7A patent/CN105452493A/zh active Pending
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003119509A (ja) * | 2001-10-11 | 2003-04-23 | Nippon Steel Corp | 溶銑予備処理方法及びインペラー装置 |
KR20040053602A (ko) * | 2002-12-17 | 2004-06-24 | 주식회사 포스코 | 용선 탈류효율 향상을 위한 탈류제 투입방법 |
JP2005068506A (ja) * | 2003-08-26 | 2005-03-17 | Sumitomo Metal Ind Ltd | 溶銑の脱硫方法及び脱硫装置 |
JP2007277669A (ja) * | 2006-04-10 | 2007-10-25 | Nippon Steel Corp | 溶銑の脱硫方法 |
JP2010116612A (ja) * | 2008-11-14 | 2010-05-27 | Jfe Steel Corp | 溶銑の脱硫方法 |
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KR101485529B1 (ko) | 2015-01-22 |
JP6445557B2 (ja) | 2018-12-26 |
EP3031935A4 (en) | 2017-04-05 |
US20160186277A1 (en) | 2016-06-30 |
EP3031935A1 (en) | 2016-06-15 |
US10077482B2 (en) | 2018-09-18 |
CN105452493A (zh) | 2016-03-30 |
JP2016530402A (ja) | 2016-09-29 |
EP3031935B1 (en) | 2019-07-03 |
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