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WO2012091407A2 - Appareil pour la fabrication d'acier fondu et procédé pour la fabrication d'acier fondu l'utilisant - Google Patents

Appareil pour la fabrication d'acier fondu et procédé pour la fabrication d'acier fondu l'utilisant Download PDF

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Publication number
WO2012091407A2
WO2012091407A2 PCT/KR2011/010151 KR2011010151W WO2012091407A2 WO 2012091407 A2 WO2012091407 A2 WO 2012091407A2 KR 2011010151 W KR2011010151 W KR 2011010151W WO 2012091407 A2 WO2012091407 A2 WO 2012091407A2
Authority
WO
WIPO (PCT)
Prior art keywords
iron
rotary kiln
coal
reduced
ore
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/KR2011/010151
Other languages
English (en)
Korean (ko)
Other versions
WO2012091407A3 (fr
Inventor
김성연
김희원
백찬준
최진식
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
Priority to CN201180060164.8A priority Critical patent/CN103261445B/zh
Priority to JP2013547331A priority patent/JP2014505169A/ja
Publication of WO2012091407A2 publication Critical patent/WO2012091407A2/fr
Publication of WO2012091407A3 publication Critical patent/WO2012091407A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/06—Making pig-iron other than in blast furnaces in rotary kilns
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/32—Arrangement of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/33—Arrangement of devices for discharging
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a molten iron manufacturing apparatus for producing molten iron and a molten iron manufacturing method using the same, and more particularly, a molten iron manufacturing apparatus for manufacturing molten iron by melting and reducing the reduced iron produced in a rotary kiln in an electric furnace and a molten iron manufacturing method using the same. It is about.
  • the carbon source used as a fuel and a reducing agent depends on the coke which processed the specific raw coal, and the iron source mainly depends on the sintered ore which passed through the series of agglomeration processes.
  • the current blast furnace process must be accompanied by raw material preliminary treatment equipment such as coke production equipment and sintering equipment, which is necessary to construct additional additional equipment in addition to the blast furnace equipment, which requires a huge cost for the equipment.
  • the present invention is to provide a molten iron manufacturing apparatus that can manufacture molten iron using low-cost raw materials in low cost and environmentally friendly, and a molten iron manufacturing method using the same.
  • a rotary kiln configured to reduce iron ore to produce reduced iron and an electric furnace for supplying the reduced iron produced by reducing in the rotary kiln to produce molten iron
  • the rotary kiln includes a body part configured to be reduced while moving iron ore therein, and one side of the body part is provided with a charging port for charging raw materials and fuels therein, and a gas discharge port for discharging gas, and on the opposite side, reduced iron is provided.
  • a molten iron manufacturing apparatus is provided with a discharge port for discharging, a combustion unit capable of performing pulverized coal injection and combustion, and a plurality of air inlets for introducing air therein.
  • the step of reducing the iron ore in the rotary kiln to produce reduced iron And supplying the reduced iron prepared as described above to an electric furnace to prepare a molten iron,
  • the reduced iron manufacturing step feeds iron ore, coal and limestone from one side of the body of the rotary kiln to the other side and moves to the other side.
  • a molten iron manufacturing method configured to be discharged after being reduced iron.
  • molten iron can be manufactured using low cost raw materials in low cost and environmentally friendly.
  • FIG. 1 is a schematic view showing an example of a molten iron manufacturing apparatus according to the present invention.
  • FIG. 2 is a schematic view showing an example of a rotary kiln of the molten iron manufacturing apparatus of the present invention.
  • the present invention relates to a molten iron manufacturing apparatus including a rotary kiln configured to reduce iron ore and an electric furnace for producing molten iron by receiving reduced iron produced by reducing the rotary kiln and a molten iron manufacturing method using the same.
  • Figure 1 shows an example of a molten iron manufacturing apparatus according to the present invention.
  • the molten iron manufacturing apparatus 1 of the present invention is supplied with a rotary kiln 10 configured to reduce iron ore to produce reduced iron and a reduced iron produced by reducing the rotary kiln 10.
  • An electric furnace 20 to manufacture is included.
  • the rotary kiln 20 of the present invention includes a body portion 11 configured to be reduced while moving iron ore therein, and the body portion 11 One side of the) is provided with an inlet 111 for charging the raw materials and fuels inside, a gas outlet 112 for discharging the gas, on the other side is a reduced iron outlet 113 for discharging the reduced iron and pulverized coal injection and combustion
  • the combustion part 114 which can be provided is provided.
  • Body portion 11 of the rotary kiln is provided with a plurality of air inlet 115 for introducing air into the interior.
  • the central portion of the rotary kiln in the longitudinal direction of the body portion 11 is provided with a coal charging port 1111 for charging coal.
  • the coal inlet 1111 is for supplying a reducing gas between the center portion and the tip portion in the body portion.
  • the length of the rotary kiln is preferably set to 130m or more.
  • the coal charging port 1111 may not be provided.
  • the molten iron manufacturing apparatus 1 includes an iron ore hopper 30 for receiving and supplying iron ore, and the iron ore hopper 30 is connected to iron ore communication through the raw material supply pipe 31 in the charging hole 111. .
  • the raw material supply pipe 31 and the coal storage hopper 50 for storing coal and the limestone supply pipe 41 connected to the limestone storage source (not shown) and the coal storage hopper 50 are stored in coal communication.
  • the coal supply pipe 51 connected by the relationship is connected.
  • a coal blocker 511 is provided in the coal supply pipe 51 between the coal storage hopper 50 and the raw material supply pipe 31.
  • the gas discharge port 112 is connected to the gas discharge pipe 131 for discharging the exhaust gas to the outside in a gas communication relationship, the first gas blower 1311, the first dust collector 1312, denitrification to the gas discharge pipe 131
  • the desulfurization apparatus 1313, the second dust collector 1314, and the second blower 1315 may be provided to remove impurities such as impurity gas or dust, and to facilitate gas discharge.
  • An end of the gas outlet 131 is connected to the stack 1316.
  • the electric furnace 20 is provided with an electrode rod 21 and an electric furnace exhaust gas discharge pipe 22.
  • the electrode 21 for example, three pairs of electrodes can be used.
  • the electric furnace exhaust gas discharge pipe 22 is connected to the iron ore hopper 30, and the electric furnace exhaust gas discharge pipe 22 between the electric furnace 20 and the iron ore hopper 30 is provided with a third dust collector 221. have.
  • the electric furnace 20 is provided with an outlet for discharging slag and an outlet for discharging molten iron.
  • an outlet for discharging slag for example, it is preferable to provide two upper outlets and two outlets.
  • the rotary kiln 10 and the electric furnace 20 may be connected in a reduced iron communication relationship through a reduced iron supply pipe 116, in this case, the reduced iron supply pipe 116 may be provided with a reduced iron agglomeration apparatus (1161). .
  • iron ore, coal, and limestone are supplied and moved inside through the charging holes 111 of the body part 11 of the rotary kiln 10, and the pulverized coal is injected and burned in the combustion unit 114, and air Supplying air into the body portion through the inlet 115 to reduce the iron ore is moved to reduce iron is produced.
  • the reduction gas generated by the coal is supplied between the center portion and the tip portion of the body portion, thereby increasing the reduction rate.
  • iron ore ferrite or lump or mixed light thereof may be used.
  • iron ore having a particle size of 8 to 22 mm can be used, and more preferably, when using a particle size of 8 to 12 mm, the metallization rate can be operated by 94% or more.
  • iron ore for example, T.Fe: 66.3% by weight, SiO 2 : 3.15% by weight, Al 2 O 3 : 1.20% by weight, K 2 O: 0.09% by weight, P: 0.06% by weight and S: 0.019% by weight Iron ores containing% can be used.
  • the coal serves as a carbon source such as ore reduction, the particle size is preferably about 6 ⁇ 16mm, and is mixed with the ore at the inlet of the rotary kiln.
  • the pulverized coal is blown in order to maintain the temperature of the free space zone of the rotary kiln by blowing at the bottom of the rotary kiln, the particle size of which is preferably 6 mm or less, and more preferably 2 to 6 mm is 70 to 80 %, And less than 2mm has a particle size of about 20 to 30%.
  • the amount of pulverized coal used in the combustion unit may vary depending on the temperature of the free space zone.
  • the limestone is supplied for desulfurization of coal, and for example, 1 to 3 mm of dolomite is mixed with ore and coal at the inlet of the rotary kiln and charged.
  • the limestone is converted to quicklime (CaCO 3 + heat ⁇ CaO + CO 2 ), contributing to the reduction of S in the molten iron during the melting process in the electric furnace.
  • the main reaction mechanism in the ore + coal bed in the body of the rotary kiln is as follows.
  • Free Space Zone is an area that supplies heat by exothermic reaction while CO gas is combusted by air input and maintains temperature 900 ⁇ 1200 °C to maintain iron ore indirect reducing atmosphere by CO gas. do.
  • the temperature of the free space zone of the rear end portion from which the exhaust gas is discharged is preferably maintained at 900 to 1000 ° C, and the temperature of the free space zone of the front end portion to which the pulverized coal is supplied is preferably maintained to 900 to 1200 ° C.
  • Reduction of the ore in the bed is indirect reduction by CO gas is more concentrated than direct reduction by carbon in the atmosphere temperature distribution, it is preferable that the ambient temperature is maintained at about 1,000 ⁇ 1,100 °C so that the C + CO 2 ⁇ 2CO reaction is activated.
  • the exhaust gas generated during the production of reduced iron includes a gas outlet 112, a gas discharge pipe 113, a first blower 1311, a first dust collector 1312, a denitrification desulfurization device 1313, a second dust collector 1314, and a second
  • the air is discharged to the atmosphere via the blower 1315 and the stack 1316.
  • the reduced iron produced as described above is supplied to the electric furnace 20 through, for example, a reduced iron supply pipe 116 to produce molten iron.
  • the reduced iron is agglomerated by the reduced iron agglomeration apparatus (1161) may be charged in the electric furnace (20).
  • the electric furnace 20 is supplied with molten iron at a high temperature of 950-1000 ° C. to melt and further reduce to manufacture molten iron.
  • the reduced iron is melted through an electrode rod 21 immersed in the slag layer of the electric furnace 20, for example, three pairs of electrode rods, and at the same time, the residual iron oxide is reduced by a certain amount of coal in the reduced iron, S is removed from the molten iron by CaO contained (CaO + FeS + C ⁇ CaS + Fe + CO).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

L'invention porte sur un appareil pour la fabrication d'acier fondu et sur un procédé pour la fabrication d'acier fondu l'utilisant. L'appareil pour la fabrication d'acier fondu comprend un four rotatif conçu pour réduire du minerai de fer pour former du fer réduit et un four électrique recevant le fer réduit fabriqué dans le four rotatif afin de fabriquer l'acier fondu. Le four rotatif comprend une partie corps dans laquelle le minerai de fer est amené à se déplacer et dans laquelle le minerai de fer est réduit. Un trou de chargement par lequel de la matière première et du combustible sont chargés et un trou d'évacuation de gaz pour l'évacuation de gaz sont formés dans un côté de la partie corps ; et un trou d'évacuation pour l'évacuation du fer réduit et une partie de combustion dans laquelle l'injection et la combustion de charbon pulvérisé sont effectuées sont disposés dans l'autre côté de la partie corps. De plus, la partie corps comprend une pluralité de trous d'entrée d'air par lesquels de l'air est introduit.
PCT/KR2011/010151 2010-12-28 2011-12-27 Appareil pour la fabrication d'acier fondu et procédé pour la fabrication d'acier fondu l'utilisant Ceased WO2012091407A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180060164.8A CN103261445B (zh) 2010-12-28 2011-12-27 铁水制备装置及使用该装置的铁水制备方法
JP2013547331A JP2014505169A (ja) 2010-12-28 2011-12-27 溶銑製造装置及びそれを利用した溶銑の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100137282A KR101220554B1 (ko) 2010-12-28 2010-12-28 용선제조장치 및 이를 이용한 용선제조방법
KR10-2010-0137282 2010-12-28

Publications (2)

Publication Number Publication Date
WO2012091407A2 true WO2012091407A2 (fr) 2012-07-05
WO2012091407A3 WO2012091407A3 (fr) 2012-09-13

Family

ID=46383684

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/010151 Ceased WO2012091407A2 (fr) 2010-12-28 2011-12-27 Appareil pour la fabrication d'acier fondu et procédé pour la fabrication d'acier fondu l'utilisant

Country Status (4)

Country Link
JP (1) JP2014505169A (fr)
KR (1) KR101220554B1 (fr)
CN (1) CN103261445B (fr)
WO (1) WO2012091407A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104870660A (zh) * 2012-12-18 2015-08-26 株式会社Posco 还原铁制造方法及制造设备
US9138000B2 (en) 2013-01-14 2015-09-22 Dmr International, Inc. Antimicrobial polymer systems using multifunctional organometallic additives for wax hosts
US10455831B2 (en) 2013-03-15 2019-10-29 Dmr International, Inc. Liquid material systems with multifunctional organometallic additives

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190017745A1 (en) * 2017-07-11 2019-01-17 Air Products And Chemicals, Inc. Systems and Methods for Preheating Metal-Containing Pellets
IT202100012065A1 (it) * 2021-05-11 2022-11-11 Sms Group S P A Impianto siderurgico con forno ad arco elettrico

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT303780B (de) * 1968-06-24 1972-12-11 Guenter Heitmann Dipl Ing Verfahren und Vorrichtung zur Erzeugung von Eisenschwamm aus oxydischen Eisenerzen
US3912501A (en) * 1971-05-11 1975-10-14 Castejon Javier Gonzalez De Method for the production of iron and steel
US3938987A (en) * 1973-04-23 1976-02-17 Mcdowell-Wellman Engineering Company Process for preparing a smelter furnace charge composition
AT327253B (de) * 1974-02-22 1976-01-26 Voest Ag Verfahren und vorrichtung zur verhuttung von eisenerzen
JPS5262103A (en) 1975-11-19 1977-05-23 Showa Denko Kk Method of reduction roasting of ores
FR2338994A1 (fr) * 1976-01-20 1977-08-19 Renault Procede d'elaboration siderurgique a partir de minerais pre-reduits
JPS5849615B2 (ja) * 1981-06-03 1983-11-05 中外炉工業株式会社 還元鉄の製造法およびその装置
JPS57203707A (en) * 1981-06-09 1982-12-14 Sumitomo Heavy Ind Ltd Charging method for carbon material into reducing furnace
US4378244A (en) * 1981-11-03 1983-03-29 The Direct Reduction Corporation System for coal injection in iron oxide reducing kilns
JPS6044368B2 (ja) * 1983-06-07 1985-10-03 強 上山 直接製鋼法
JPS6169944A (ja) 1984-09-13 1986-04-10 Nippon Steel Corp フエロクロムの溶融還元による製造方法
KR890001441A (ko) * 1987-07-01 1989-03-27 하인리히 벡커, 베른하르트 벡크 거대 환식 락틴을 함유하는 해충 박멸 조성물
JPH1172211A (ja) 1997-08-28 1999-03-16 Chisaki:Kk 粉粒状物原料の焼成炉
EP1034312B1 (fr) * 1997-12-03 2002-01-16 Sidmar N.V. Installation de reduction d'oxydes de fer et de fusion du fer
JP2001131619A (ja) * 1999-11-09 2001-05-15 Sumitomo Heavy Ind Ltd 還元装置および還元方法
KR100957933B1 (ko) * 2003-02-24 2010-05-13 주식회사 포스코 회전식 소성로의 미분탄 취입방법및 이를 이용한 생석회제조방법및 장치
CN1264993C (zh) * 2005-01-07 2006-07-19 四川龙蟒集团有限责任公司 从钒钛磁铁矿中分离提取金属元素的方法
CN101134985A (zh) * 2007-03-15 2008-03-05 大连熔融还原设备制造有限公司 煤基还原金属化球团的熔分炉炼铁法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104870660A (zh) * 2012-12-18 2015-08-26 株式会社Posco 还原铁制造方法及制造设备
US9138000B2 (en) 2013-01-14 2015-09-22 Dmr International, Inc. Antimicrobial polymer systems using multifunctional organometallic additives for wax hosts
US9795141B2 (en) 2013-01-14 2017-10-24 Dmr International, Inc. Antimicrobial polymer systems using multifunctional organometallic additives for polyurethane hosts
US10045536B2 (en) 2013-01-14 2018-08-14 Dmr International, Inc. Antimicrobial polymer systems using multifunctional organometallic additives for polyurethane hosts
US10455831B2 (en) 2013-03-15 2019-10-29 Dmr International, Inc. Liquid material systems with multifunctional organometallic additives

Also Published As

Publication number Publication date
KR20120075226A (ko) 2012-07-06
JP2014505169A (ja) 2014-02-27
WO2012091407A3 (fr) 2012-09-13
CN103261445A (zh) 2013-08-21
KR101220554B1 (ko) 2013-01-10
CN103261445B (zh) 2014-10-15

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