CN1916187A - Tecnique and euippment for making iron by using blast furnace through pure oxygen and coal gas - Google Patents

Tecnique and euippment for making iron by using blast furnace through pure oxygen and coal gas Download PDF

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Publication number
CN1916187A
CN1916187A CNA2006100477209A CN200610047720A CN1916187A CN 1916187 A CN1916187 A CN 1916187A CN A2006100477209 A CNA2006100477209 A CN A2006100477209A CN 200610047720 A CN200610047720 A CN 200610047720A CN 1916187 A CN1916187 A CN 1916187A
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CN
China
Prior art keywords
gas
blast furnace
iron
coal gas
pure oxygen
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.)
Pending
Application number
CNA2006100477209A
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Chinese (zh)
Inventor
周久乐
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.)
Dongfang Iron & Steel Co Ltd Shenyang City
Original Assignee
Dongfang Iron & Steel Co Ltd Shenyang City
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 Dongfang Iron & Steel Co Ltd Shenyang City filed Critical Dongfang Iron & Steel Co Ltd Shenyang City
Priority to CNA2006100477209A priority Critical patent/CN1916187A/en
Priority to PCT/CN2006/003280 priority patent/WO2008037132A1/en
Priority to US12/226,940 priority patent/US20090095134A1/en
Publication of CN1916187A publication Critical patent/CN1916187A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • 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
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
    • 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
    • C21C2100/00—Exhaust gas
    • C21C2100/06—Energy from waste gas used in other processes
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by 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
    • 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
    • Y02P10/25—Process efficiency

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture Of Iron (AREA)

Abstract

This invention discloses technique and equipment for iron smelting in blast furnace with pure oxygen and coal gas. The technique comprises: (1) sending pellets, alkaline sinter, coke (170-200 kg per ton iron) and fluxing agent to a blast furnace from the top, and blowing pure oxygen (120-200 Nm3 per ton iron) at the same time; (2) blowing coal gas preheated to 900-1150 deg.C under 0.1-0.6 MPa by a ball hot air stove to reduce the iron ore; (3) purifying and cooling reduced coal gas in a dedusting system, sending to a remanent pressure electricity generator via pipelines for recycling, and recovering to store in coal gas tanks or directly recycling. By using the method, the productivity of blast furnace is greatly improved, and the utilization coefficient can reach 6-8 ton iron/m3 .D. Besides, the consumption of the fluxing agent is reduced by 2/3, the residue amount is reduced by 2/3, and the comprehensive consumption of per ton iron is 492 kgCE/t. The top coal gas can be recovered for electricity generation.

Description

Pure oxygen coal gas blast furnace iron-smelting process and equipment
(1) technical field:
The present invention relates to blast furnace iron-making process in the iron and steel metallurgical industry, mainly is to replace blast furnace blast with pure oxygen, blasts the iron-smelting process that blast furnace replaces most of coke with perhydrous coal gas through preheating.
(2) background technology:
At present, 3/4 the pig iron and steely iron water all are to produce with traditional blast furnace iron-making process in the world, and traditional blast furnace iron-making process in modern age owing to adopt a new technology such as oxygen enrichment, coal powder injection, maximization, makes the contemporary BF ironmaking technology that significant progress arranged.
High purity water gas production technology (seeing patent 200610045968.1)) and the development of coal gas, coke-oven gas, gas renormalizing technology because, suitability for industrialized production high quality, high purity, high hydrogeneous, low-cost reducing gas technology are ripe, so development is that the pure oxygen blast furnace ironmaking process of main reductive agent can be realized with above-mentioned coal gas.
Do not find with coal gas to be reductive agent by retrieval, replace the technology and the equipment of the pure oxygen coal gas blast furnace of preheating air blast with the winding-up pure oxygen.
(3) summary of the invention
The objective of the invention is to for traditional blast furnace iron-making process provides a kind of brand-new technology reforming technology and equipment i.e. " pure oxygen coal gas blast furnace iron-smelting process and equipment ".
The technical scheme that adopts is:
The pure oxygen coal gas blast furnace iron-smelting process comprises following process:
1, will be sent into the blast furnace from furnace roof by the mineral aggregate that pellet, alkaline agglomerate, coke, flux constitute, molten iron wherein per ton is joined coke 170-200kg;
2, blast pure oxygen in blast furnace, the consumption of pure oxygen is molten iron 120-200Nm per ton 3The coal gas that blasts in blast furnace simultaneously through bead formula coal gas hotblast stove pressurization preheating reduces to metallic ore, and the gas temperature of pressurization preheating is 900-1150 ℃, and gas pressure is 0.1-0.6MPa;
3, the coal gas that produces of reduction carries out purifying and cooling through dust-removal system, delivers to excess pressure power generating device by pipeline, utilizes again, is recycled to gas tank then or directly recycles.
Pure oxygen coal gas blast furnace iron-smelting equipment, comprise feeding system, gravity blast furnace dust catcher, ceramic pipe type fly-ash separator, bag-type dust collector, carbonic acid gas pressure-swing absorption apparatus, excess pressure power generating device, it is characterized in that around blast-furnace bosh, offering a plurality of gas injection mouths and a plurality of oxygen spray mouth, the little pebble stove of one gas preheating is set outside blast furnace, and this coal gas pebble stove links by a plurality of gas injection mouths of offering around pipeline and the blast-furnace bosh; Be equiped with the coal gas explosion device on the pipeline of gas preheating pebble stove exit end, a plurality of oxygen spray mouths of offering on the blast-furnace bosh link by pipeline and source of oxygen.
The coal gas that reaction process of the present invention produced purifies and lowers the temperature through gravitational precipitator, ceramic pipe type fly-ash separator and bag-type dust and carbonic acid gas pressure-swing absorption apparatus.Through purifying and the top gas of cooling passes to by pipeline and is recycled to gas tank after excess pressure power generating device utilizes again, also can recycle.
After the present invention adopted above-mentioned technology, the productivity of blast furnace increased substantially, and the utilization coefficient of blast furnace can reach 6-8 ton iron/m 3D, the flux consumption reduces 2/3, and the quantity of slag reduces 2/3, and iron comprehensive consumption per ton can reach 492kgCE/t, the recyclable generating of stock gas.
(4) description of drawings
Fig. 1 is the system diagram of present device.
(5) embodiment
Embodiment one
The pure oxygen coal gas blast furnace iron-smelting process:
Pellet, alkaline agglomerate, coke, flux are sent into the blast furnace from furnace roof, and iron wherein per ton is joined coke 180kg; Blast pure oxygen then in blast furnace, and will directly be reduced to pellet and iron-bearing material to blast furnace by the pressurize gas injection of preheating of pebble stove simultaneously, molten iron drum oxygen amount per ton is 130Nm 3, coal gas is preheating to 1000 ℃-1100 ℃ through the pebble stove pressurization, and gas pressure is 0.2MPa.The coal gas that reaction process produced carries out purifying and cooling through gravitational precipitator, ceramic pipe type fly-ash separator and sack cleaner and carbonic acid gas pressure-swing absorption apparatus, through purifying and the top gas of cooling passes to by pipeline and is recycled to gas tank after excess pressure power generating device utilizes again, certainly, also can recycle.
Pure oxygen coal gas blast furnace iron-smelting equipment, comprise feeding device 1, blast furnace 2, gravitational precipitator 4, ceramic pipe type fly-ash separator 5, sack cleaner 6, carbonic acid gas pressure-swing absorption apparatus 7, excess pressure power generating device 8, its constructional feature is that the bosh at blast furnace 2 offers a plurality of gas injection mouths and a plurality of oxygen spray mouth up and down respectively, the periphery of belly is respectively arranged with that coal gas is sent into coil pipe 9 and oxygen is sent into coil pipe 3, a plurality of coal gas entrances are drawn arm and coal gas respectively and are sent into coil pipe 9 and link, and a plurality of oxygen entrances are drawn arm and oxygen respectively and sent into coil pipe 3 and link; Outer setting at blast furnace 2 has the little pebble stove 11 of a gas preheating, and the little pebble stove 11 of this gas preheating is sent into coil pipe 9 by gas pipe 12 and coal gas and linked, and coal gas explosion security device 10 is installed on the gas pipe 12.
Embodiment two
The pure oxygen coal gas blast furnace iron-smelting process:
Pellet, alkaline agglomerate, coke, flux are sent into the blast furnace from furnace roof, and iron wherein per ton is joined coke 190kg; Blast pure oxygen then in blast furnace, and will directly be reduced to pellet and iron-bearing material to blast furnace by the pressurize gas injection of preheating of pebble stove simultaneously, molten iron drum oxygen amount per ton is 160Nm 3, coal gas is preheating to 1000 ℃-1100 ℃ through the pebble stove pressurization, and gas pressure is 0.3MPa.The coal gas that reaction process produced carries out purifying and cooling through gravitational precipitator, ceramic pipe type fly-ash separator and sack cleaner and carbonic acid gas pressure-swing absorption apparatus, through purifying and the top gas of cooling passes to by pipeline and is recycled to gas tank after excess pressure power generating device utilizes again, certainly, also can recycle.
Embodiment three
The pure oxygen coal gas blast furnace iron-smelting process:
Pellet, alkaline agglomerate, coke, flux are sent into the blast furnace from furnace roof, and iron wherein per ton is joined coke 200kg; Blast pure oxygen then in blast furnace, and will directly be reduced to pellet and iron-bearing material to blast furnace by the pressurize gas injection of preheating of pebble stove simultaneously, molten iron drum oxygen amount per ton is 190Nm 3, coal gas is preheating to 1000 ℃-1100 ℃ through the pebble stove pressurization, and gas pressure is 0.5MPa.The coal gas that reaction process produced carries out purifying and cooling through gravitational precipitator, ceramic pipe type fly-ash separator and sack cleaner and carbonic acid gas pressure-swing absorption apparatus, through purifying and the top gas of cooling passes to by pipeline and is recycled to gas tank after excess pressure power generating device utilizes again, certainly, also can recycle.

Claims (4)

1, pure oxygen coal gas blast furnace iron-smelting process is characterized in that comprising following process:
A, will be sent into the blast furnace from furnace roof by the mineral aggregate that pellet, alkaline agglomerate, coke, flux constitute, iron wherein per ton is joined coke 170-200kg;
B, blast pure oxygen simultaneously in blast furnace, the consumption of pure oxygen is molten iron 120200Nm per ton 3The coal gas that blasts in blast furnace simultaneously through bead formula coal gas hotblast stove pressurization preheating reduces to metallic ore, and the gas temperature of pressurization preheating is 900 ℃-1150 ℃, and gas pressure is 0.1-0.6MPa;
The coal gas that C, reduction produce carries out purifying and cooling through dust-removal system, delivers to excess pressure power generating device by pipeline, utilizes again, is recycled to gas tank then or directly recycles.
2, pure oxygen coal gas blast furnace iron-smelting equipment, comprise feeding system, gravity blast furnace dust catcher, ceramic pipe type fly-ash separator, bag-type dust collector, carbonic acid gas pressure-swing absorption apparatus, excess pressure power generating device, it is characterized in that around blast-furnace bosh, offering a plurality of gas injection mouths and a plurality of oxygen spray mouth, the little pebble stove of one gas preheating is set outside blast furnace, and the little pebble stove of this gas preheating links by a plurality of gas injection mouths of offering around pipeline and the blast-furnace bosh; Be equiped with the coal gas explosion device on the pipeline of gas preheating pebble stove exit end, a plurality of oxygen spray mouths of offering on the blast-furnace bosh link by pipeline and source of oxygen.
3, pure oxygen coal gas blast furnace iron-smelting process according to claim 1 is characterized in that: pellet, alkaline agglomerate, coke, flux are sent into the blast furnace from furnace roof, and iron wherein per ton is joined coke 190kg; Blast pure oxygen then in blast furnace, and will directly be reduced to pellet and iron-bearing material to blast furnace by the pressurize gas injection of preheating of pebble stove simultaneously, molten iron drum oxygen amount per ton is 160Nm 3, coal gas is preheating to 1000 ℃-1100 ℃ through the pebble stove pressurization, and gas pressure is 0.3MPa; The coal gas that reaction process produced carries out purifying and cooling through gravitational precipitator, ceramic pipe type fly-ash separator and sack cleaner and carbonic acid gas pressure-swing absorption apparatus, through purifying and the top gas of cooling passes to by pipeline and is recycled to gas tank after excess pressure power generating device utilizes again, certainly, also can recycle.
4, pure oxygen coal gas blast furnace iron-smelting process according to claim 1 is characterized in that: pellet, alkaline agglomerate, coke, flux are sent into the blast furnace from furnace roof, and iron wherein per ton is joined coke 200kg; Blast pure oxygen then in blast furnace, and will directly be reduced to pellet and iron-bearing material to blast furnace by the pressurize gas injection of preheating of pebble stove simultaneously, molten iron drum oxygen amount per ton is 190Nm 3, coal gas is preheating to 1000 ℃-1100 ℃ through the pebble stove pressurization, and gas pressure is 0.5MPa.The coal gas that reaction process produced carries out purifying and cooling through gravitational precipitator, ceramic pipe type fly-ash separator and sack cleaner and carbonic acid gas pressure-swing absorption apparatus, through purifying and the top gas of cooling passes to by pipeline and is recycled to gas tank after excess pressure power generating device utilizes again, certainly, also can recycle.
CNA2006100477209A 2006-09-12 2006-09-12 Tecnique and euippment for making iron by using blast furnace through pure oxygen and coal gas Pending CN1916187A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CNA2006100477209A CN1916187A (en) 2006-09-12 2006-09-12 Tecnique and euippment for making iron by using blast furnace through pure oxygen and coal gas
PCT/CN2006/003280 WO2008037132A1 (en) 2006-09-12 2006-12-05 A process for iron smelting in blast furnace using purified oxygen and coal gas and its device
US12/226,940 US20090095134A1 (en) 2006-09-12 2006-12-05 Process and Equipment for Blast Furnace Ironmaking Using Pure Oxygen and Gas

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CNA2006100477209A CN1916187A (en) 2006-09-12 2006-09-12 Tecnique and euippment for making iron by using blast furnace through pure oxygen and coal gas

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CN1916187A true CN1916187A (en) 2007-02-21

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CN (1) CN1916187A (en)
WO (1) WO2008037132A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009129677A1 (en) * 2008-04-23 2009-10-29 Zhou Jiule A method of iron smelting in blast furnace with high temperature coal gas
CN101519703B (en) * 2008-02-26 2010-12-08 宝山钢铁股份有限公司 Low-coke-ratio blast furnace ironmaking technique
CN102348813A (en) * 2009-03-24 2012-02-08 保尔伍斯股份有限公司 Tuyere stock arrangement for a blast furnace and method for feeding hot blast into a blast furnace
CN102388152A (en) * 2009-04-28 2012-03-21 保尔伍斯股份有限公司 Method for feeding a burden to a blast furnace
CN102414328A (en) * 2009-04-30 2012-04-11 杰富意钢铁株式会社 Blast furnace operation method
WO2023029816A1 (en) * 2021-09-03 2023-03-09 中冶赛迪工程技术股份有限公司 Low carbon blast furnace ironmaking method

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CN101792834B (en) * 2010-03-26 2011-06-22 西安陕鼓动力股份有限公司 Automatic sweeping method for gas replaced with nitrogen in blast furnace gas energy recovery system pipe network
CN101792831B (en) * 2010-03-26 2011-08-31 西安陕鼓动力股份有限公司 Automatic sweeping method for nitrogen replaced with gas in blast furnace gas energy recovery system pipe network
CN101792833B (en) * 2010-03-26 2011-06-22 西安陕鼓动力股份有限公司 Automatic sweeping method for nitrogen replaced with air in blast furnace gas energy recovery system pipe network
CN103695665B (en) * 2013-12-18 2015-04-01 中冶南方工程技术有限公司 Process for recycling zinc and producing molten iron by using iron-containing zinc dust
LU101227B1 (en) * 2019-05-21 2020-11-23 Wurth Paul Sa Method for Operating a Blast Furnace

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101519703B (en) * 2008-02-26 2010-12-08 宝山钢铁股份有限公司 Low-coke-ratio blast furnace ironmaking technique
WO2009129677A1 (en) * 2008-04-23 2009-10-29 Zhou Jiule A method of iron smelting in blast furnace with high temperature coal gas
CN102348813A (en) * 2009-03-24 2012-02-08 保尔伍斯股份有限公司 Tuyere stock arrangement for a blast furnace and method for feeding hot blast into a blast furnace
US8945463B2 (en) 2009-03-24 2015-02-03 Paul Wurth S.A. Tuyere stock arrangement for a blast furnace and method for feeding hot blast into a blast furnace
CN102388152A (en) * 2009-04-28 2012-03-21 保尔伍斯股份有限公司 Method for feeding a burden to a blast furnace
CN102388152B (en) * 2009-04-28 2015-04-01 保尔伍斯股份有限公司 Method for feeding a burden to a blast furnace
CN102414328A (en) * 2009-04-30 2012-04-11 杰富意钢铁株式会社 Blast furnace operation method
CN102414328B (en) * 2009-04-30 2014-03-05 杰富意钢铁株式会社 Blast furnace operation method
WO2023029816A1 (en) * 2021-09-03 2023-03-09 中冶赛迪工程技术股份有限公司 Low carbon blast furnace ironmaking method

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