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WO2017111490A1 - Dispositif de fabrication de fonte liquide et procédé de fabrication de fonte liquide utilisant celui-ci - Google Patents

Dispositif de fabrication de fonte liquide et procédé de fabrication de fonte liquide utilisant celui-ci Download PDF

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Publication number
WO2017111490A1
WO2017111490A1 PCT/KR2016/015088 KR2016015088W WO2017111490A1 WO 2017111490 A1 WO2017111490 A1 WO 2017111490A1 KR 2016015088 W KR2016015088 W KR 2016015088W WO 2017111490 A1 WO2017111490 A1 WO 2017111490A1
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WO
WIPO (PCT)
Prior art keywords
molten iron
flow reduction
iron
gas
molten
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/KR2016/015088
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English (en)
Korean (ko)
Inventor
최무업
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 CN201680074988.3A priority Critical patent/CN108541273B/zh
Publication of WO2017111490A1 publication Critical patent/WO2017111490A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces

Definitions

  • the present invention relates to an apparatus for manufacturing molten iron and a method for manufacturing molten iron using the same, and more particularly, to maintain the inside of a flow reduction furnace used for reducing iron ore in a Finex process at a temperature suitable for reducing iron ore ( It relates to a molten iron manufacturing apparatus of the FINEX) process and a molten iron manufacturing method using the same.
  • Steel manufacturing which is used in most modern industries such as automobiles, shipbuilding, home appliances, construction, etc., generally proceeds in the order of steel making, steel making, casting and rolling.
  • metal is manufactured using the blast furnace method in a steelmaking process.
  • the blast furnace method is a method of manufacturing molten iron by injecting oxygen ore after the sintering process and coke prepared from bituminous coal into the blast furnace.
  • an auxiliary facility such as a coke production facility for producing bituminous coal as coke and a sintering facility for sintering of iron ore should be provided.
  • the blast furnace method requires a purification facility for purifying the environmental pollutants together with the auxiliary facilities.
  • the additional costs incurred by the installation of the auxiliary equipment and the purification equipment are directly reflected in the manufacturing cost of steel, and according to the blast furnace method, a problem arises in that the manufacturing cost of steel is high. Therefore, in the current steel industry, the blast furnace method is replaced by a melt reduction method.
  • the melt reduction method is also called a FINEX method.
  • the blast furnace method uses sintered agglomerated iron ore (natural iron ore) or natural iron ore, while the Finex process uses a powdered iron ore (iron ore).
  • the blast furnace method coke processed with bituminous coal is used, but ordinary coal is directly used in the Finex process.
  • the FINEX method does not require coke production facilities, iron ore sintering facilities, purification facilities, etc., and it uses lower cost than iron pyrite and ordinary coal, which is cheaper than bituminous coal. There are advantages to it.
  • the Finex method has a very environmentally friendly advantage compared to the blast furnace method.
  • a flow reduction furnace for reducing ferrous ore and a melt gasification furnace for producing molten iron by melting the reduced ferrite and ordinary coal are used.
  • Combustible gas and oxygen are supplied into the flow reduction furnace to reduce the ferrite ore.
  • Combustible gas flows through the dispersion plate formed at the bottom of the flow reduction path into the flow reduction path in a uniform flow and then flows the ferrite.
  • Oxygen is introduced into the flow reduction reactor through a bed burner mounted on the side of the flow reduction reactor and reacts with the combustible gas to form an internal temperature of the flow reduction reactor suitable for reduction of ferrite.
  • the combustible gas inside the flow reduction furnace is combusted with oxygen, carbon dioxide and water vapor are formed. As shown in FIG. 1, when the ratio of carbon dioxide and water vapor in the combustible gas is increased, the reducing power for the ferrite is weakened.
  • the technical problem to be achieved by the present invention is to provide a molten iron manufacturing apparatus and a molten iron manufacturing method of the Finex process for supplying heat to the fluidized bed in the flow reducing path without loss of reducing gas.
  • An apparatus for manufacturing molten iron includes a flow reduction reactor for providing reduced iron, a molten gasification furnace for charging molten iron and injecting oxygen therein to produce molten iron, and a plasma gas into the flow reduction reactor. It includes a plasma torch blowing.
  • the plasma torch may form a flame using the plasma gas to supply heat to the flow reduction path.
  • the plasma gas may be any one of hydrogen, nitrogen, helium, and argon gas.
  • the average temperature of the fluidized bed inside the flow reduction reactor may be 500 to 1000 °C.
  • the apparatus may further include an electricity supply device installed outside the flow reduction path and connected to the plasma torch.
  • the electricity supply device may supply 1 to 100 MWh of energy to the plasma torch.
  • the flow reduction path may include a dispersion plate through which a reducing gas passes, and the plasma torch may be positioned on the dispersion plate and positioned on an outer wall of the flow reduction path.
  • the plasma torch may be provided in plurality along the outer wall of the flow reduction path.
  • It may further include a reducing gas supply pipe for supplying the reducing gas discharged from the melt gasifier to the flow reduction path.
  • the fluidized bed in the flow reduction path can be heated.
  • the reduction rate of the ferrite ore can be increased to increase the efficiency of the Finex process.
  • 1 is a phase diagram of CO, CO 2, H 2, H 2 O, Fe, FeO, Fe 3 O 4, and Fe 2 O 3.
  • FIG. 2 is a view schematically showing the configuration of a molten iron manufacturing apparatus according to an embodiment of the present invention.
  • FIG 3 is a view schematically showing a flow reduction path according to an embodiment of the present invention.
  • Figure 4 is a plan view schematically showing a flow reduction path according to an embodiment of the present invention.
  • first, second, and third are used to describe various parts, components, regions, layers, and / or sections, but are not limited to these. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, the first portion, component, region, layer or section described below may be referred to as the second portion, component, region, layer or section without departing from the scope of the invention.
  • FIG. 2 is a view schematically showing a molten iron manufacturing apparatus according to an embodiment of the present invention.
  • the molten iron manufacturing apparatus of FIG. 2 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the molten iron manufacturing apparatus can be variously modified.
  • the apparatus for manufacturing molten iron 100 includes a flow reduction reactor 20 and a melt gasifier 10.
  • the apparatus for manufacturing molten iron 100 may include other devices as necessary.
  • Flow reduction furnace 20 is converted to reduced iron by reducing and calcining iron ore and secondary raw materials.
  • the iron ore charged into the flow reduction path 20 is made of reduced iron while passing through the flow reduction path 20 after being pre-dried.
  • the iron ore and auxiliary materials charged into the flow reduction path 20 form a flow bed 1 inside the flow reduction path 20.
  • the flow reduction reactor 20 is a packed-bed reduction reactor, receives a reducing gas from the melt gasifier 10 to form a packed bed therein.
  • the melt gasifier 10 includes a coal-filled layer therein, charges reduced iron and blows oxygen into the molten iron to produce molten iron.
  • the reducing gas discharged from the molten gasifier 10 is supplied to the flow reduction reactor 20 through a reducing gas supply pipe 40 and then used to reduce and calcinate iron ore and subsidiary materials through the flow reduction reactor 20. It is discharged to the outside.
  • the apparatus for manufacturing molten iron 100 temporarily stores powdered iron ore and secondary raw materials having a particle size of 8 mm or less in a hopper, and then removes moisture from a dryer and mixes to prepare an iron-containing mixture. Then, the prepared iron-containing mixture is charged to the fluid reduction reactor (20).
  • the molten iron manufacturing apparatus 100 includes a homogeneous back pressure device between the dryer and the flow reduction path 20 so that the iron-containing mixture at room temperature may be charged into the flow reduction path 20 maintained at 1.5 to 3 atmospheres at atmospheric pressure. can do.
  • the powdered iron ore and auxiliary raw materials supplied to the fluid reduction reactor 20 form a bubble fluidized bed in contact with a high temperature reducing gas stream, and have a high temperature reduced iron at 80 ° C. or higher, 80% reduction and 30% or more firing. Is switched to.
  • a high temperature compaction apparatus may be further included in order to prevent scattering loss generated when the reduced iron discharged from the flow reduction reactor 20 is directly charged into the molten gasifier 10. .
  • the molten gasifier 10 is supplied with coal briquettes formed of lump coal or pulverized coal to form a coal filling layer.
  • the lump coal or coal briquettes injected into the melt gasifier 10 is gasified by a pyrolysis reaction in the upper part of the coal packed bed and a combustion reaction by oxygen in the lower part.
  • the high temperature reducing gas generated in the melt gasifier 10 by the gasification reaction is sequentially supplied to the flow reduction reactor 20 through the reducing gas supply pipe 40 and used as a reducing agent and a fluidizing gas.
  • An empty space in the form of a dome is formed on the filling layer of the melt gasifier 10. This reduces the gas flow rate, thereby preventing a large amount of fines generated due to the rapid temperature increase of the fines contained in the reduced iron to be charged and the coal charged into the molten gasifier 10 to the outside of the furnace. In addition, it absorbs the pressure fluctuations in the molten gasifier 10 due to irregular fluctuations in the amount of gas generated by using coal directly. In the packed bed, coal descends to the bottom and is devolatilized and gasified, and ultimately combusted by oxygen blown through the tuyere in the furnace bottom.
  • the combustion gas is converted into a high temperature reducing gas while raising the packed bed and discharged to the outside of the melt gasifier 10, and partly, the pressure applied to the melt gasifier 10 is constant within the range of 3.0 to 3.5 atm. It is dusted and cooled while passing through the collecting device so as to be maintained.
  • Cyclone (cyclone) to collect the flue-gas generated in the molten gasifier 10, supply the dust back to the molten gasifier 10, and supplies the gas to the flow reduction path 20 through the reducing gas supply pipe (40) Supply. Reduced iron is finally reduced and melted by the reducing gas and combustion heat generated by coal gasification and combustion while descending the packed bed with coal and discharged to the outside.
  • the apparatus for manufacturing molten iron according to the present embodiment may separately install a plasma torch 30 for increasing the temperature.
  • FIG. 3 is a view schematically showing a flow reduction path and a plasma torch according to an embodiment of the present invention.
  • the plasma gas 2 is directly blown into and combusted in a region into which the reducing gas flows into the flow reduction path 20.
  • the plasma torch 30 is located on the outer wall of the flow reduction path 20, but is disposed on the dispersion plate 21 to transfer the plasma gas 2 to the flow reduction path ( 20) Supply internally.
  • FIG. 4 is a plan view schematically illustrating a flow reduction path and a plasma torch according to an embodiment of the present invention.
  • a plurality of plasma torches 30 may be positioned along an outer circumference of the flow reduction path 20, and the number of plasma torches 30 may be variously configured.
  • the plasma torch 30 forms a flame 3 using the plasma gas 2 to supply heat to the flow reduction path 20, and accordingly, flow bed inside the flow reduction path 20.
  • the average temperature of the fluidized bed 1 may be maintained at 500 to 1000 ° C.
  • the plasma gas 2 may be hydrogen, nitrogen, helium, or argon gas. Accordingly, the molten iron manufacturing apparatus 100 according to the present embodiment does not consume the reducing gas supplied from the melt gasification furnace 10 into the flow reduction reactor 20, and thus, the fluidized bed 1 inside the flow reduction reactor 20. It can supply heat.
  • the contact area with the flow bed 1 is achieved. This may reduce the amount of melt produced in the flow reduction path 20 by the high temperature flame.
  • the plasma torch 30 may be supplied with electric power by the electricity supply device 31 installed outside the flow reduction path 20.
  • the electricity supply device 31 may provide 1 to 100 MWh of energy to the plasma torch 30.
  • Electricity supply device 31 may include a control unit for controlling the amount of energy supply so that the temperature of the flow bed (1) is maintained at 500 to 1000 ° C.
  • the molten iron manufacturing apparatus 100 includes an external independent electricity supply device 31, the heat to be supplied to the inside of the flow reduction path 20 independently irrespective of the operating conditions of the flow reduction path Can be controlled.
  • FIG. 5 is a flow chart showing a molten iron manufacturing method according to an embodiment of the present invention.
  • the molten iron manufacturing apparatus 100 according to an embodiment of the present invention is reduced and calcined by reducing and calcining the iron-containing mixture mixed and dried iron-containing ore and secondary raw materials through the flow reduction reactor (20) Convert to (S100).
  • the powdery iron ore and auxiliary raw materials are contacted with a high temperature reducing gas stream to form a bubble flow layer, and are converted to high temperature reduced iron at elevated temperatures of 80 ° C. or higher, 80% reduction and 30% or more firing.
  • molten iron S200
  • the molten gasifier 10 is supplied with coal briquettes formed of lump coal or pulverized coal to form a coal filling layer.
  • the lump coal or coal briquettes injected into the melt gasifier 10 is gasified by a pyrolysis reaction in the upper part of the coal packed bed and a combustion reaction by oxygen in the lower part. Reduced iron is ultimately reduced and melted by the reducing gas and combustion heat generated by coal gasification and combustion while descending the coal packed bed with coal, and discharged to the outside.
  • the high temperature reducing gas generated in the molten gasifier 10 by the gasification reaction is supplied to the flow reduction path 20 through the reducing gas supply pipe 40 (S300).
  • the molten iron manufacturing method according to the present embodiment converts the iron-containing mixture into reduced iron in step S100, Blown-combustion of the plasma gas 2 over the region into which the reducing gas flows.
  • the plasma gas 2 forms a flame to supply heat to the flow reduction path 20, and thus the flow bed 1 in the flow reduction path 20 absorbs heat.
  • the average temperature of the fluidized bed 1 may be maintained at 500 to 1000 ° C.
  • the molten iron manufacturing method according to the present embodiment heats the flow bed 1 inside the flow reduction reactor 20 without consuming the reducing gas supplied from the melt gasification furnace 10 into the flow reduction reactor 20.
  • the contact area with the flow bed 1 is achieved. This may reduce the amount of melt produced in the flow reduction path 20 by the high temperature flame.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)

Abstract

L'objectif de la présente invention est de fournir : un dispositif de fabrication de fonte liquide d'un processus Finex pour fournir de la chaleur à un lit fluidisé dans un four de réduction fluidisé sans perte de gaz de réduction; et un procédé de fabrication de fonte liquide utilisant celui-ci. À cet effet, le dispositif de fabrication de fonte liquide selon un mode de réalisation de la présente invention comprend : un four de réduction fluidisé pour fournir un fer réduit; un four de fusion-gazéificateur pour charger le fer réduit dans celui-ci, et injecter de l'oxygène dans celui-ci de manière à fabriquer une fonte liquide; et une torche à plasma pour injecter un gaz de plasma dans le four de réduction fluidisé. Étant donné que la présente invention comporte la torche à plasma pour fournir de la chaleur à l'intérieur du four de réduction fluidisé, la température du lit fluidisé à l'intérieur du four de réduction fluidisé peut être augmentée. En outre, étant donné que la torche à plasma est disposée à une position adaptée, les dommages causés à une plaque de dispersion peuvent être évités, et la température du lit fluidisé peut augmenter en utilisant le gaz à plasma de sorte que le gaz de réduction ne soit pas consommé, de manière à permettre une augmentation de rendement du processus Finex par augmentation du taux de réduction de minerai de fer fin.
PCT/KR2016/015088 2015-12-23 2016-12-22 Dispositif de fabrication de fonte liquide et procédé de fabrication de fonte liquide utilisant celui-ci Ceased WO2017111490A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680074988.3A CN108541273B (zh) 2015-12-23 2016-12-22 铁水制备装置及利用它的铁水制备方法

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KR10-2015-0185026 2015-12-23
KR1020150185026A KR101699236B1 (ko) 2015-12-23 2015-12-23 용철 제조 장치 및 이를 이용한 용철 제조 방법

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CN109628676B (zh) * 2019-01-07 2020-10-30 山西赛思普科技有限公司 一种直接生产纯净铁水的短流程工艺
KR20240018206A (ko) 2022-08-02 2024-02-13 주식회사 포스코 용철 제조 설비 및 용철 제조 방법
KR20240018212A (ko) 2022-08-02 2024-02-13 주식회사 포스코 용철 제조 설비 및 용철 제조 방법
KR20240018205A (ko) 2022-08-02 2024-02-13 주식회사 포스코 용철 제조 설비 및 용철 제조 방법
KR20250104391A (ko) 2023-12-29 2025-07-08 주식회사 포스코 용철 제조 설비 및 용철 제조 방법
KR20250104392A (ko) 2023-12-29 2025-07-08 주식회사 포스코 용철 제조 설비 및 용철 제조 방법
KR20250104393A (ko) 2023-12-29 2025-07-08 주식회사 포스코 용철 제조 설비 및 용철 제조 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1074581A (ja) * 1996-08-30 1998-03-17 Fuji Electric Co Ltd プラズマ式流動層炉
JPH11131118A (ja) * 1997-10-31 1999-05-18 Nkk Corp 予備還元炉
KR20050089836A (ko) * 2002-12-23 2005-09-08 주식회사 포스코 유동환원로 조업을 개선한 용철제조장치 및 그용철제조방법
KR20080061550A (ko) * 2006-12-28 2008-07-03 주식회사 포스코 용철제조장치 및 이를 이용한 용철제조방법
KR101191954B1 (ko) * 2005-12-26 2012-10-17 주식회사 포스코 개선된 유동환원로를 구비한 용철제조장치

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA88843C2 (ru) * 2008-06-23 2009-11-25 Анатолий Тимофеевич Неклеса СПОСОБ ПРЯМОГО ВОсстановления ЖЕЛЕЗА И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ
UA90788C2 (ru) * 2008-09-15 2010-05-25 Анатолий Тимофеевич Неклеса Способ получения железосодержащего материала прямым восстановлением
CN101597662B (zh) * 2009-07-02 2011-04-06 贾会平 一种生产直接还原铁的方法
CN102653805B (zh) * 2012-05-25 2014-07-16 辽宁博联特冶金科技有限公司 一种埋弧等离子熔融炼铁方法
CN103045788A (zh) * 2012-12-04 2013-04-17 中冶赛迪工程技术股份有限公司 一种还原炼钢方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1074581A (ja) * 1996-08-30 1998-03-17 Fuji Electric Co Ltd プラズマ式流動層炉
JPH11131118A (ja) * 1997-10-31 1999-05-18 Nkk Corp 予備還元炉
KR20050089836A (ko) * 2002-12-23 2005-09-08 주식회사 포스코 유동환원로 조업을 개선한 용철제조장치 및 그용철제조방법
KR101191954B1 (ko) * 2005-12-26 2012-10-17 주식회사 포스코 개선된 유동환원로를 구비한 용철제조장치
KR20080061550A (ko) * 2006-12-28 2008-07-03 주식회사 포스코 용철제조장치 및 이를 이용한 용철제조방법

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Publication number Publication date
KR101699236B1 (ko) 2017-01-24
CN108541273A (zh) 2018-09-14
CN108541273B (zh) 2020-06-05

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