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WO2020022577A1 - Appareil de désilicification de canal de fer fondu - Google Patents

Appareil de désilicification de canal de fer fondu Download PDF

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Publication number
WO2020022577A1
WO2020022577A1 PCT/KR2018/014766 KR2018014766W WO2020022577A1 WO 2020022577 A1 WO2020022577 A1 WO 2020022577A1 KR 2018014766 W KR2018014766 W KR 2018014766W WO 2020022577 A1 WO2020022577 A1 WO 2020022577A1
Authority
WO
WIPO (PCT)
Prior art keywords
skimmer
molten iron
slag
deregulation
columnar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/014766
Other languages
English (en)
Korean (ko)
Inventor
최응수
허금식
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Publication of WO2020022577A1 publication Critical patent/WO2020022577A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
    • 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
    • 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
    • C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal

Definitions

  • the present invention relates to a columnar desulfurization apparatus for molten iron.
  • the molten iron obtained from the FINEX method has a high content of silicon (Si) and thus requires desulfurization outside the furnace.
  • Representative out-of-furnace desulfurization operations include columnar desulfurization operations that induce desulfurization, such as iron oxide, to induce desulfurization reactions between molten iron and molten iron.
  • the molten iron obtained in the FINEX method has a higher Si content (% by weight) than the blast furnace, which causes an operation load in a subsequent steelmaking process.
  • the Si component content (wt%) of the molten iron obtained by the Finex method is higher than that of the blast furnace because the combustion zone temperature of molten gas furnace that produces molten iron, that is, molten iron, in the Finex method is higher than that of the blast furnace.
  • the Si content of the blast furnace molten iron is about 0.5% by weight based on the molten iron temperature of 1,500 ° C, while the Si content of the FINEX molten iron is about 0.8% by weight, which is higher than that of the blast furnace.
  • the columnar desulfurization method has been proposed to reduce the Si content of the Finex molten iron.
  • a skimmer is installed in a large hot water flowing through molten iron, and the skimmer is separated into molten iron and slag through the skimmer.
  • the separated slag is flowed into the slag flow, the molten iron is flowed into the large bath, and just before being supplied from the molten iron transportation device, the dispersing iron, such as sintered ore, is added by deregulation to lower the Si content of the molten iron.
  • the conventional columnar denitrification method uses a skimmer, so there are problems such as the attachment of a raceway barrel, the occurrence of slag forming in the molten iron transport apparatus (TLC), and the increase in the throughput of slag in the steelmaking process.
  • TLC molten iron transport apparatus
  • two skimmers are used, and a high speed blowing of deregulation is performed between the first and second skimmers so that the desulfurization reaction can be efficiently carried out, and SiO 2 and slag generated by the descaling reaction can be removed through the second skimmer. It is intended to provide a columnar desulfurization apparatus for molten iron.
  • the columnar desulfurization apparatus of the molten iron according to an embodiment of the present invention, a raceway for receiving the molten iron out of the melt gas flowing out of the molten gas furnace flowing along the large waterway, the agent for separating the melt into molten iron and slag It may include one skimmer.
  • the columnar desulfurization apparatus of the molten iron may include a deregulation supply bin that is installed in the upper portion of the large hot water supply to blow the deregulation into the molten iron that passed through the first skimmer.
  • the columnar desulfurization apparatus of the molten iron may include a second skimmer installed in the large hot water at a predetermined interval with the first skimmer and separating the SiO 2 and slag generated by the deregulation reaction from the deregulation and the molten iron from the molten iron. .
  • the deregulated supply bin is installed between the first skimmer and the second skimmer,
  • the second skimmer may be installed between the first skimmer and the raceway.
  • the interval between the second skimmer and the first skimmer may be set to an interval range of 1 m to 2 m.
  • the first skimmer is connected to the main slag runway for discharging slag separated from the molten iron by the first skimmer,
  • the second skimmer may be connected to the auxiliary slag runaway for discharging slag and SiO 2 separated from the molten iron by the second skimmer.
  • the auxiliary slag runaway may be connected by the main slag runaway with a connector.
  • a cover for preventing scattering of molten iron and slag may be installed at an upper portion of the large bath.
  • the cover may cover the upper end of the first skimmer and the upper end of the second skimmer.
  • the cover may be coupled to be detachably attached to an upper end of the first skimmer and an upper end of the second skimmer.
  • Deregulated blow nozzle is installed at the lower end of the deregulated supply bin
  • the deregulated blow nozzle may be inserted into the cover.
  • At least one protrusion is formed on the bottom surface of the large hot water, and may include a vortex protrusion for inducing the blowing deregulator to meet the molten iron.
  • the vortex protrusion may be formed in a hemispherical or semi-elliptic shape.
  • the vortex protrusion may be formed between the first skimmer and the second skimmer.
  • Deregulators may include powdery or mill scale having a particle size in the range of 1 mm-5 mm.
  • At least one slag separation jaw may be formed on the bottom surface of the large bath.
  • the deregulation reaction is carried out efficiently by blowing a deregulator between the first and second skimmers, and SiO 2 and slag generated by the descaling reaction are subjected to the second skimmer. Can be removed via
  • FIG. 1 is a schematic configuration diagram of an apparatus for columnar desulfurization of molten iron according to a first embodiment of the present invention.
  • FIG. 2 is a schematic plan view of a columnar desulfurization apparatus of molten iron according to a first embodiment of the present invention.
  • FIG. 3 is a schematic partial configuration diagram of a columnar desulfurization apparatus for molten iron according to a second embodiment of the present invention.
  • FIG. 4 is a schematic partial configuration diagram of a columnar desulfurization apparatus for molten iron according to a third embodiment of the present invention.
  • FIG. 1 is a schematic configuration diagram of a columnar desulfurization apparatus of a molten iron according to a first embodiment of the present invention
  • Figure 2 is a schematic plan view of a columnar desulfurization apparatus of a molten iron according to a first embodiment of the present invention.
  • the molten iron column denitrification apparatus is a molten gas discharged from the outlet 11 of the molten gas furnace 10 and flows along the large bath 20. It may include a raceway (30) for receiving the molten iron (1).
  • the molten iron 1 accommodated in the raceway 30 may be supplied to the molten iron transportation device 40.
  • the large skimmer 20 may be provided with a first skimmer 100 for separating the melt flowing along the large molten metal 20 into the molten iron 1 and the slag 3.
  • the deregulation supply bin 200 for blowing the molten iron 1 passed through the first skimmer 100 and the deregulator 210 for inducing a deregulation reaction may be installed at an upper portion of the large bath 20.
  • the columnar talgyu apparatus of the hot metal the first at a distance set up 10000000000000000 weeks shaft 30 from the skimmer 100 is provided on the daetang Figure 20, the hot metal to SiO 2 and the slag 3 produced by talgyu reaction It may include a second skimmer 300 for separation from (1).
  • the first skimmer 100 and the second skimmer 300 are installed in the large hot waterway 20 to use the molten iron 1 and the molten iron using different specific gravity differences during the discharge process of discharging the molten iron melted in the molten gas furnace 10. It serves to separate into slag (3).
  • the first skimmer 100 is installed in the large hot waterway 20 between the melt gas furnace 10 and the raceway 30, and may be located close to the outlet 11 of the melt gas furnace 10. .
  • the first skimmer 100 may be installed at a distance set from the molten gas furnace 10 toward the raceway 30.
  • the deregulation supply bin 200 may be installed between the first skimmer 100 and the second skimmer 300 in order to effectively induce the deregulation reaction of the deregulator 210 and the molten iron 1.
  • the deregulator 210 may include a powdery ore or mill scale having a particle size in the range of 1 mm to 5 mm as the deregulator for effective de-silification reaction with the molten iron (1).
  • the deregulation supply bin 200 is a vertical direction (FIG. 1 to Y direction).
  • the deregulation supply bin 200 is located above the large bath 20 and blows the deregulator 210, such as iron oxide, into the molten iron 1 of the large bath at high speed, thereby deregulating 210 and the molten iron 1. Desorption reaction can proceed.
  • the deregulator 210 such as iron oxide
  • the deregulation supply bin 200 may be located directly above the distal end of the second skimmer 300 so that the molten iron 1 may blow in the deregulation immediately before passing through the second skimmer 300.
  • the tip of the second skimmer 300 refers to an end where the molten iron starts to be supplied to the second skimmer 300, that is, an end close to the first skimmer 100.
  • the second skimmer 300 is installed in the large bath 20 between the first skimmer 100 and the raceway 30, and may be installed at intervals set from the raceway 30 toward the first skimmer 100. Can be.
  • the interval between the second skimmer 300 and the first skimmer 100 may be set to, for example, an interval of 1 m to 2 m so as to have a sufficient deregulation reaction time between the molten iron 1 and the deregulator 210. .
  • main slag tandem 110 for discharging the slag 3 separated from the molten iron 1 by the first skimmer 100 may be connected to the first skimmer 100.
  • An auxiliary slag runway 320 for discharging SiO 2 and slag 3 separated from the molten iron 1 by the second skimmer 300 may be connected to the second skimmer 300.
  • Auxiliary slag runway 320 is the main slag of the first skimmer 100 to discharge the SiO 2 and slag 3 separated from the molten iron 1 by the second skimmer 300 to the main slag runway 110. It may be connected by the slag tapping 110 and the connector 321.
  • the connector 321 may be installed to be inclined at a predetermined angle with the auxiliary slag runway 320 to connect the auxiliary slag runway 320 with the main slag runway 110.
  • the first skimmer 100 is installed in the large waterway 20 between the melt gas furnace 10 and the raceway 30, and the second skimmer 300 is provided at a predetermined interval from the first skimmer 100. 1 is installed in the bath 20 between the skimmer 100 and the raceway.
  • the deregulation supply bin 200 is installed between the first skimmer 100 and the second skimmer 300 and is positioned at a height set at an upper portion of the large bath 20.
  • the melt discharged from the outlet 11 of the molten gas furnace 10 flows along the large bath 20, and sequentially passes through the first skimmer 100 and the second skimmer 300.
  • the melt is separated into molten iron 1 and slag 3, and the slag separated from the molten iron 1 is discharged to the main slag tap water 110.
  • the molten iron 1 separated from the slag 3 passes through the first skimmer 100 and then flows into the large bath 20 between the first skimmer 100 and the second skimmer 300.
  • the deregulation supply 210 such as iron oxide spectroscopy is blown into the molten iron 1 passing through the first skimmer 100 in the deregulation supply bin 200 located above the large bath 20 at a high speed. Therefore, the deregulation reaction of the deregulator 210 and the molten iron 1 can proceed efficiently.
  • the SiO 2 and the slag (3) generated by the de-silification reaction are separated by the molten iron (1) and the second skimmer (300), and the separated SiO 2 and the slag (3) is the auxiliary slag turbidity (320) Is discharged through.
  • the SiO 2 and the slag 3 discharged through the auxiliary slag runway 320 are discharged to the main slag runway 110 through the connection pipe 321, the slag treatment may be smoothly performed.
  • the SiO 2 and the slag 3 generated by the de-silicon reaction are discharged to the auxiliary slag turbidity 320, the SiO 2 and the slag 3 are attached to the raceway 30 as in the related art.
  • the phenomenon that flows into the molten iron carrier 40 can be prevented.
  • the interval between the second skimmer 300 and the first skimmer 100 is set to, for example, an interval range of 1 m to 2 m, sufficient deregulation reaction time of the molten iron 1 and the deregulator 210 can be ensured. have.
  • FIG. 3 is a schematic partial configuration diagram of a columnar desulfurization apparatus for molten iron according to a second embodiment of the present invention.
  • the columnar denitrification apparatus of the molten iron according to the second embodiment of the present invention is the same as that described in the columnar denitrification apparatus of the molten iron according to the first embodiment of the present invention, except for the matters described below in detail. .
  • the cover 400 may be installed at an upper portion of the large bathway 20 to prevent scattering of the slag 3 due to the molten iron 1 and the desulfurization reaction in the large bathway 20. have.
  • the cover 400 may be installed at an upper portion of the large bath 20 between the first skimmer 100 and the second skimmer 300.
  • a first slag separating bar 120 for separating the molten iron 1 and the slag 3 is installed at one end of the first skimmer 100, and a molten iron 1 is provided at one end of the second skimmer 300.
  • a second slag separation bar 330 for separation of the slag 3 may be installed.
  • One end of the cover 400 is installed at the other end of the second skimmer 300 so that the cover 400 can cover the upper end of the first skimmer 100 and the upper end of the second skimmer 300.
  • the other end of the cover 400 may be installed at an upper end of one end of the first skimmer 100.
  • one end of the cover 400 and one end of the first skimmer 100 indicate an end portion close to the second skimmer 300, and the other end of the cover 400 and the second skimmer 300 are formed.
  • the other end refers to an end closer to the first skimmer 100.
  • the cover 400 may be coupled to be detachably attached to an upper end of the first skimmer 100 and an upper end of the second skimmer 300 for periodic cleaning.
  • the cover 400 is provided at the lower end of the deregulation supply bin 200 so that the deregulator 210 can be blown in a state in which the first skimmer 100 and the second skimmer 300 are covered with the cover 400.
  • the deregulated blow nozzle 220 may be inserted and coupled.
  • the cover 400 may be provided with a coupling hole (not shown) for inserting the deregulated blowing nozzle 220.
  • the deregulation blowing nozzle 220 installed at the lower end of the deregulation supply bin 200 is inserted into and coupled to the cover 400, the deregulation agent 210 may be effectively blown into the molten iron of the large bath 20.
  • the deregulator 210 at the deregulated blow nozzle 220 causes the first skimmer 100 and the second skimmer 300. Even if blown into the large bath 20 between), it is possible to prevent the molten iron (1) and the deregulated slag (3) is scattered by the deregulator 210.
  • At least one protrusion is formed on the bottom surface of the large bath 20, so that the slag 3 can be easily separated from the molten iron 1 in the first skimmer 100 or the second skimmer 300.
  • the slag separating jaw (21, 23) may be included.
  • the slag separating jaw 21 and 23 may be formed in a triangle or the like so that the slag 3 can be easily separated from the molten iron 1 in the first skimmer 100 or the second skimmer 300.
  • the slag separating jaw 21 may be installed between the first skimmer 100 and the second skimmer 300 so that the slag 3 can be easily separated from the molten iron in the first skimmer 100.
  • the slag separating jaw 23 may be installed between the second skimmer 300 and the raceway 30 so that the slag 3 can be easily separated from the molten iron in the second skimmer 300.
  • FIG. 4 is a schematic partial configuration diagram of a columnar desulfurization apparatus for molten iron according to a third embodiment of the present invention.
  • the columnar desulfurization apparatus of the molten iron according to the third embodiment of the present invention is the same as that described in the columnar denitrification apparatus of the molten iron according to the first and second embodiments of the present invention, except for the matters specifically described below. Let's do it.
  • the columnar desulfurization apparatus of the molten iron according to the third exemplary embodiment of the present invention may include a vortex protrusion 25.
  • Vortex projection 25 is the bottom of the large waterway 20 to induce the deregulator 210, which is blown so that the deregulation can effectively effect the deregulation reaction meets the molten iron (1) flowing along the large waterway (20) At least one protrusion may be formed on the surface.
  • the vortex protrusion 25 may be formed in a hemispherical shape or a semi-elliptic shape so as to induce the blowing deregulator 210 to better meet the molten iron 1 flowing along the large bath 20.
  • Vortex protrusion 25 is formed between the first skimmer 100 and the second skimmer 300 in order to allow the deregulation agent 210 to be blown better with the molten iron 1 through the first skimmer 100. Can be.
  • the vortex protrusion 25 may be installed directly below the deregulation blowing nozzle 220 such that the deregulator 210 is blown well with the molten iron 1.
  • the deregulation reaction efficiency is increased. Can be increased.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Analytical Chemistry (AREA)

Abstract

La présente invention concerne un appareil de désilicification de canal de fer fondu. Dans une désilicification de canal de fer fondu, selon la présente invention, sont fournis : un premier écrémoir, qui est disposé dans un canal principal et sépare un produit fondu en fer fondu et en scories ; un bac d'alimentation en agent de désilicification pour souffler un agent de désilicification dans le fer fondu ; et un second écrémoir pour séparer le SiO2 et les scories qui sont générées par une réaction de désilicification.
PCT/KR2018/014766 2018-07-24 2018-11-28 Appareil de désilicification de canal de fer fondu Ceased WO2020022577A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0086062 2018-07-24
KR1020180086062A KR102112625B1 (ko) 2018-07-24 2018-07-24 용선의 주상 탈규 장치

Publications (1)

Publication Number Publication Date
WO2020022577A1 true WO2020022577A1 (fr) 2020-01-30

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Application Number Title Priority Date Filing Date
PCT/KR2018/014766 Ceased WO2020022577A1 (fr) 2018-07-24 2018-11-28 Appareil de désilicification de canal de fer fondu

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KR (1) KR102112625B1 (fr)
WO (1) WO2020022577A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0420963B2 (fr) * 1984-11-16 1992-04-07 Sumitomo Metal Ind
JPH0435525B2 (fr) * 1984-03-02 1992-06-11 Sumitomo Metal Ind
JPH0474410B2 (fr) * 1984-03-02 1992-11-26
JP2001172709A (ja) * 1999-12-14 2001-06-26 Nkk Corp 溶銑の脱珪処理方法
KR100805572B1 (ko) * 2001-10-04 2008-02-20 주식회사 포스코 고로로부터 출선되는 용융물의 탈규방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6383214A (ja) * 1986-09-26 1988-04-13 Nkk Corp 高炉鋳床における脱珪、脱燐処理用大樋
KR100805710B1 (ko) * 2001-09-27 2008-02-21 주식회사 포스코 대탕도의 탈규제 투입장치
JP7088526B2 (ja) * 2017-11-27 2022-06-21 ｉＰｒｅｓｅｎｃｅ合同会社 情報提供システム、プログラム、情報提供方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435525B2 (fr) * 1984-03-02 1992-06-11 Sumitomo Metal Ind
JPH0474410B2 (fr) * 1984-03-02 1992-11-26
JPH0420963B2 (fr) * 1984-11-16 1992-04-07 Sumitomo Metal Ind
JP2001172709A (ja) * 1999-12-14 2001-06-26 Nkk Corp 溶銑の脱珪処理方法
KR100805572B1 (ko) * 2001-10-04 2008-02-20 주식회사 포스코 고로로부터 출선되는 용융물의 탈규방법

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Publication number Publication date
KR102112625B1 (ko) 2020-05-19
KR20200011223A (ko) 2020-02-03

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