CN101386897A - Iron-smelting technology of SDRF furnace - Google Patents
Iron-smelting technology of SDRF furnace Download PDFInfo
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- CN101386897A CN101386897A CNA2007100926965A CN200710092696A CN101386897A CN 101386897 A CN101386897 A CN 101386897A CN A2007100926965 A CNA2007100926965 A CN A2007100926965A CN 200710092696 A CN200710092696 A CN 200710092696A CN 101386897 A CN101386897 A CN 101386897A
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- 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
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Abstract
The invention belongs to the class of a metallurgical technology, in particular to a technology of an ironmaking process in an SDRF furnace. The invention consists of a smelting gas making furnace and a reduction shaft furnace; hot sponge iron, coke, lump coal and flux in the smelting gas making furnace are added from a material charging and distributing system on the top of the furnace; pulverized coal, pulverized ore and a ferrous powder material are sprayed from an oxygen spraygun arranged in a wind port and a furnace body; by blowing into mass pure oxygen, both molten iron and reduced coal gas are produced and transported to the reduction shaft furnace to produce the sponge iron; raw materials used by the reduction shaft furnace are added into the furnace through the material charging and distributing system on the top of the furnace; the raw materials and hot reducing gas blown in from the wind port of the furnace body react to produce the sponge iron; the sponge iron taps off the furnace through a cooling section of the shaft furnace; about half of heat is transported to the smelting gas making furnace; and the other half is supplied to the outside. The ironmaking process in the SDRF furnace can simultaneously produce two products of the molten iron and the sponge iron; resource and energy in production are recycled substantially; therefore, the technology is a circular economy process and a clean production process which utilize the resource and the energy most effectively.
Description
Technical field
The present invention belongs to the metallurgical technology class, particularly can produce two kinds of products of molten iron and sponge iron simultaneously, also is the SDRF stove iron-smelting process technology of the most economical recycling industries and clean production of energy utilization.
Background technology
The iron-smelting process technology has modern blast furnace technology, direct reduction technique and melting and reducing technology at present.Blast-furnace technique and melting and reducing technology are produced molten iron, and directly reduction technique is produced sponge iron.
The very ripe advanced person of modern blast furnace ironmaking technology must use coke, must join and build corresponding coke-oven plant but exist; It is main that the blast furnace feeding raw material adopts high basicity sinter, and the burden structure of suitably arrange in pairs or groups acidic pellet ore or part lump ore, blast furnace system must be joined and built corresponding sintering plant.Blast furnace process long flow path, big, the serious shortcomings such as (especially coke-oven plant, sintering plants) of environmental pollution of investment.
Produce sponge iron with direct reduction technique, technology maturation, production method gas fiduciary point 80%, but owing to be subjected to oil, natural gas source and price limit, very slow at Chinese development, high, also uneconomical with the investment of coal generating gas long flow path.
COREX melting and reducing technology is unique melting reduction iron-smelting method that has dropped into industrial-scale production.The coal gas that it is few with coke, environmental protection good, but mass production can be done material gas again.But the COREX iron-smelting device also exists following shortcoming:
1, structure is huge, and output is 1000M
3The level blast furnace COREX its highly near 4000M
3The blast furnace of level, owing to want introduction of foreign technology and major equipment, body part output investment ratio blast furnace is high by 77.7%, all the output investment ratio blast furnace high by 30% (comprising self-built oxygen station) of the unit pig iron.
2, must use block furnace charges such as lump ore, pellet and lump coal, and physicochemical property is had relatively high expectations.
3,1050-1100 ℃ high temperature reduction gas of melting gasification furnace product must drop to 820-850 ℃ and keep supplying portion's reduction furnace use.Cause very big heat-energy losses and waste.
4, the COREX top gas is good material gas, and it is burnt or generate electricity when fuel, does not embody its value, does not have most economical utilization to account for half this material gas (only South Africa produces sponge iron as reducing gas) of total energy consumption.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned iron-smelting process, a kind of SDRF stove iron-smelting process technology is provided.It can produce molten iron and two kinds of products of sponge iron simultaneously, also has the output of an amount of coal gas, is the iron-smelting process technology of most economical, the cleaner production of resource circulation utilization.
Purpose of the present invention realizes by following proposal:
1) SDRF stove iron-smelting process technology is made up of several major parts such as melting producer, reduction shaft furnace, coal gas treatment systems, and melting producer and reduction shaft furnace are arranged in parallel in the framework, a public feeding system; The structure of melting producer is that the cupola well identical with blast furnace, a top are the tuyere zones of a total oxygen air blast, top is that bosh, furnace bosh, shaft, topmost add an ellipse vault and form again.
2) thermal sponge iron and coke, lump coal, flux are added by the charging cloth system of furnace roof, fine coal, fine ore and iron-containing waste spray into from the oxygen lance that is located at air port and shaft, by being blown into a large amount of pure oxygens (pure oxygen air blast), can not only produce molten iron, the while has also produced and has contained (H
2+ CO) be approximately 85% high temperature reduction coal gas (1050-1100 ℃), reducing gas from furnace roof draw after dedusting and participate in cold reducing gas and reduce to 800-850 ℃ after, send into reduction shaft furnace and produce sponge iron.
3) reduction shaft furnace is that reducing gas is the high pressure shaft furnace of 300KPa based on CO, furnace top pressure, raw material is 80% pellet and 20% lump ore, charging cloth system by furnace roof adds in the stove, generate sponge iron with the thermal reduction gas reaction of sending into from the shaft air port, behind the loosening roller in shaft furnace bottom, cooling section, come out of the stove, approximately half delivers to the melting producer with pipeline thermal, and second half send steelmaking system or outer confession after Passivation Treatment.
4) top gas of reduction shaft furnace is after dust removal process, and (PSA) removes CO by pressure-swing absorption apparatus
2After make reducing gas, send into that hotblast stove is heated to after 850 ℃ and the thermal reduction gas of melting producer mixes and sends in the reduction shaft furnace through pressurization again.
Description of drawings:
Accompanying drawing is SDRF stove iron-smelting process technological system figure
Among the figure, part 1 is the melting producer, part 2 is a reduction shaft furnace, part 3 is a material loading master conveyor, part 4 is the furnace roof feeding machine, part 5 is the loading device of melting producer, part 6 is the charger pan of thermal sponge iron, part 7 is the loading device of reduction shaft furnace, part 8 is the gravity type boat davit fly-ash separator, part 9 is hot tornado dust collector, part 10 is a shaft furnace furnace roof gas line, and part 11 is a dry gas cleaning, and part 12 is the purified gas pipeline, part 13 removes device for CO2, part 14 gas compressors, part 15 is a hotblast stove, part 16 send device for pneumatic heat, part 17 is hot gas delivery press, part 18 send pipeline for outer for sponge iron heat, and part 19 send pipeline for sponge iron heat, and part 20 is outer for the sponge iron storage tank, part 21 is that raw gas pipeline member 22 is the coal gas mixing duct, part 23 is the thermal reduction gas line, and part 24 is for sending gas line outside, and part 25 is hotblast stove branch gas tube road, part 26 is cold reducing gas pipeline, part 27 is a cold high pressure reducing gas air flue, and part 28 is a high pressure reducing gas pipeline, and part 29 is the thermal reduction gas line, part 30 oxygen blast air ports, part 31 is the sponge iron cooling recirculation system, part 32 cold reducing gas small transfer lines, and part 33 is the reducing gas small transfer line, part 34 is fine coal/fine ore injection system, part 35 is a dust-removing powder collection blowing device, and part 36 is an iron notch, and part 37 is a slag notch, part 38 is TRT top pressure power generation, and part 39 is a gas chamber.
Embodiment
Below in conjunction with accompanying drawing an embodiment of the present utility model is further described:
SDRF stove iron-smelting process technology is made up of melting producer 1 and reduction shaft furnace 2, and melting producer 1 and reduction shaft furnace 2 are arranged in parallel in the framework, a public feeding system.
The raw material that stock yard comes is delivered to melting producer and reduction shaft furnace furnace roof transhipment belt 4 through feed belt 3, with lump coal, coke and flux in the loading device 5 of melting producer is packed melting producer 1 into, with lump ore, pelletizing through the loading device 7 of the reduction shaft furnace reduction shaft furnace 2 of packing into.Oxygen is sent in the melting producer 1 by oxygen blast air port 30, and powder-material (fine coal, fine ore, ground flux) sprays into stove 1 through injection system 34, and iron dust containing sprays into stove 1 through injection system 35.The sponge iron that reduction shaft furnace 2 is produced, adopt pressurized gas Pneumatic conveyer 16 parts to send pipeline 19 to send into furnace top bin 6 through sponge iron heat and send into the loading device 5 of the melting producer melting producer 1 of packing into again, a part is sent pipeline 18 to send steelworks or is sent outer for sponge iron storage tank 20 outer confessions for sponge iron heat through outer in addition.
The lump coal and the coke that add from melting producer furnace roof are heated rapidly by the furnace high-temperature reducing gas, lump coal is also by coking, form red-hot coke bed, sponge iron that adds from system gas smelting furnace top and the iron-containing charge that sprays into are very fast by high temperature reduction coal gas heat fused, pass red-hot coke bed, form molten iron and slag and arrive cupola well, realize that at cupola well slag iron separates, regularly tap a blast furnace, slag tap from slag notch 37 from iron notch 36.Oxygen and coal, coke that system oxygen blast air port, gas smelting furnace bottom 30 blasts burn so that enough heat and high temperature reduction coal gas to be provided.High temperature reduction coal gas is derived from melting producer top raw gas pipeline 21 and is entered gravity type boat davit fly-ash separator 8, high temperature reduction gas after the dedusting enters coal gas mixing duct 22 to be mixed with the cold reducing gas of sending here through cold high pressure reducing gas pipeline 27 of shaft furnace furnace roof through dedusting, decarburization, pressure treatment, temperature drops to through 820-850C ° and enters hot tornado dust collector 9, dedusting after thermal reduction gas line 23 send in the shaft furnace 2.
The reduction shaft furnace top gas is derived by top gas of reduction shaft furnace pipeline 10, enters 11 dedustings of dry type coal gas dust removal device, and wherein most of coal gas enters CO by purified gas pipeline 12 after the dedusting
2Deviate from device 13, the reduction shaft furnace top gas is deviate from CO
2After the cold reducing gas that obtains, by cold reducing gas pipeline 26 through gas compressor 14 pressurizations after high pressure reducing gas pipeline 28 is sent into hotblast stove 15 heating, send into reduction shaft furnace 2 through thermal reduction gas line 29 and make reducing gas.A part of in addition coal gas send the TRT overbottom pressure to reclaim generating 38 through sending gas line 24 outside, enters gas chamber 39 storages after the decompression again, supplies outside sending gas line 24 outside.In addition for the sponge iron after the cooling reduction is provided with sponge iron cooling recirculation system 31 in the bottom of reduction shaft furnace 2, by the cold high pressure reducing gas of cold reducing gas pipeline 32 supplies; For the source of the gas that air conveying sponge iron is provided is provided with hot gas delivery press 17 and supply high pressure reducing gas small transfer line 33; For provide fuel to be provided with hotblast stove branch gas tube road 25 fuel supplying gas to hotblast stove.
The benefit that SDRF stove iron-smelting process technology is brought:
A, a kind of heating molten steel of both having produced of establishment are produced again sponge iron, also have the ring of suitable coal gas output Guarantor, energy-conservation, water-saving SDRF stove ironmaking new technology.
B, employing injection technology, pulverized coal injection, fine ore and flux spray coal amount and reach significantly 300kg/t iron; Burden structure is controlled on the optimal proportion, thereby will hangs down molten iron and sponge significantly The iron cost.
C, minimizing dust, discharge of wastewater are accomplished zero-emission substantially, reduce CO as far as possible2Discharging can be filled Dividing utilizes the purer CO2 (purity 87.4%) that deviates from the production process as industrial chemicals.
The sponge iron of d, reduction shaft furnace production is hot, adopts 600 ℃ of pressurized gas to carry continuously In stove pack into to charging, the apparatus for distributing at melting producer top.
E, melting producer have and sponge iron can be smelted into qualified molten iron, and a large amount of high temperature takes place again The dual-use function of reducing gases. Except from melting producer top adds lump coal, coke, sponge iron, also In stove, spray into fine coal, fine ore and ground flux significantly. The sponge iron that adds from the top is under melt Passing the dynamic bed of high-temperature coke is able to carburizing, temperature raising, is reduced into molten iron eventually.
F, melting producer generation high temperature reduction coal gas function are different from coal generating gas stove, melting system fully Steam stove has sprayed into suitable flux, the separation of liquid slag iron is arranged and have powerful adjustment molten iron to become at crucible zone Divide and sulphur move towards function. Most sulphur enter slag, and 5% the sulphur that only enters approximately the stove total sulfur content turns to Move on in the high temperature reduction coal gas, this coal gas can be directly used in reduction shaft furnace and give birth to factory's sponge iron, coal generating gas stove Slag making and desulfuration in furnace function a little less than, most sulphur enter high temperature reduction coal gas, this coal gas is necessary Just can return former shaft furnace after the desulfurization and give birth to factory's sponge iron.
(1050-1100 ℃) high temperature reduction coal gas that g, melting producer produce mixes cold reducing gas that the shaft furnace top gas makes after treatment and makes reducing gas drop to 800-850 ℃ to send reduction shaft furnace to, saved a large amount of heat energy.
Dry cloth bag is adopted in h, top gas of reduction shaft furnace dedusting, and the coal gas ash and the melting producer stock gas dedusting ash of its generation are all sprayed in the stove from melting producer top and bottom by air conveying.The SDRF stove does not have the output of coal gas ash, the water treatment system of no wet gas cleaning complexity.
I, SDRF stove iron-smelting process technology, a large amount of fine ores, fine coal, iron-containing waste have been recycled, all use dry method dust, water saving, heat energy, chemical energy also all are fully utilized, realize two tons of iron of one ton of fuel production (one ton of molten iron and one ton of sponge iron), thereby will hang down molten iron cost significantly, constitute the recycling economy technology of the most economical cleaner production of resource, energy utilization.
Claims (11)
1, SDRF stove iron-smelting process technology, it is characterized in that: prepare three parts by melting producer, reduction shaft furnace and reducing gas and form, thermal sponge iron that the melting producer is used and coke, lump coal, flux are added by the charging cloth system of furnace roof, fine coal, fine ore and iron content powder spray into from the oxygen lance that is located at air port and shaft, by being blown into a large amount of pure oxygens, not only produce molten iron, produced simultaneously and contain H
2It is 1050-1100 ℃ of reducing gas that+CO is approximately 85% temperature, sends into reduction shaft furnace and produces sponge iron; The used raw material of reduction shaft furnace is added in the stove by the charging cloth system of furnace roof, generate sponge iron with the thermal reduction gas reaction of sending into from the shaft air port, come out of the stove behind the shaft furnace cooling section, a part is delivered to the melting producer with pipeline thermal, and another part send steelmaking system or outer confession after Passivation Treatment.
2, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: the structure of melting producer is that the cupola well identical with blast furnace, a top are the tuyere zones of a total oxygen air blast, top is that bosh, furnace bosh, shaft, topmost add an ellipse vault and form again.
3, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: it is the high pressure reduction shaft furnace of 300KPa based on CO, steam stove roof pressure power that reduction shaft furnace adopts reducing gas, 820-850 ℃ of reducing gas temperature, reduction shaft furnace bottom are provided with the cold gas lesser circulation of loosening material roller and sponge iron cooling usefulness.
4, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: the iron-containing charge of melting producer is that the sponge iron of reduction shaft furnace production accounts for 80%, fine ore and iron dust containing account for 20%, fuel that the melting producer uses and reductive agent are: total amount as 1000Kg/t iron about, its ratio is coke 13% and coal 87%, in the coal, lump coal accounts for 60%, fine coal accounts for 40%; Fine coal, fine ore and ground flux spray in the stove from air port and melting producer top.
5, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: the reducing gas of making after the used reducing gas of reduction shaft furnace is handled by melting producer and reduction shaft furnace top gas is supplied with continuously, and the raw material of reduction shaft furnace is pellet 80% and lump ore 20%.
6, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: melting producer and reduction shaft furnace are arranged in juxtaposition, a melting producer reduction shaft furnace in parallel, a shared furnace body frame and a feeding system.
7, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: the 1050-1100 ℃ of high temperature reduction coal gas that the melting producer is produced, with the cold reducing gas blending cooling that the shaft furnace top gas is made after treatment, make and mix cold reducing gas and drop to 820-850 ℃ and advance reduction shaft furnace.
8, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: the melting producer sprays into flux, there is liquid slag iron to separate and have the function of moving towards of powerful adjustment hot metal composition and sulphur at crucible zone, most sulphur enter slag, only go into 5% sulphur of stove total sulfur approximately and transfer in the high temperature reduction coal gas, this coal gas can be directly used in reduction shaft furnace and give birth to factory's sponge iron.
9, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: the sponge iron of reduction shaft furnace production hot be about 600 ℃, adopt in compression reducing gas pipe-line transportation packs stove into to charging, the apparatus for distributing system at melting producer top.
10, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: dry method dust is adopted in the top gas of reduction shaft furnace dedusting, the dedusting ash of the various fly-ash separators of stock gas is all by air conveying foldback melting producer, from top and the bottom spray in the stove.
11, according to claims 1 described SDRF stove iron-smelting process utilisation technology, it is characterized in that: melting producer and reduction shaft furnace overhaul simultaneously, stop production simultaneously, not because of utilizing the different a large amount of coal gas diffusion problems that cause of working hour in equipment year with coal gas.
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| CN200710092696.5A CN101386897B (en) | 2007-09-14 | 2007-09-14 | Iron-smelting technology of SDRF furnace |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603109B (en) * | 2009-07-07 | 2011-01-05 | 中冶赛迪工程技术股份有限公司 | Process for treating top gas of reduction shaft furnace |
| CN101935730B (en) * | 2009-10-22 | 2011-11-16 | 中冶赛迪工程技术股份有限公司 | Furnace top charging process in iron-making process |
| CN101935731B (en) * | 2009-10-22 | 2011-12-21 | 中冶赛迪工程技术股份有限公司 | Top charging process for iron-making process furnace |
| CN102365374A (en) * | 2009-04-03 | 2012-02-29 | 保尔伍斯股份有限公司 | Method and installation for producing direct reduced iron |
| CN101935729B (en) * | 2009-10-22 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Top loading process for iron-smelting process furnace |
| CN103290160A (en) * | 2012-02-29 | 2013-09-11 | 宝山钢铁股份有限公司 | Process for producing direct reduced iron (DRI) by carrying out pure oxygen gasification on semicoke |
| CN103966380A (en) * | 2013-01-24 | 2014-08-06 | 宝山钢铁股份有限公司 | Method for recycling dedusted powder in shaft furnace top gas |
| CN104611496A (en) * | 2013-11-04 | 2015-05-13 | Posco公司 | Apparatus and method for collecting dust of reducing gas |
| CN107502694A (en) * | 2017-08-16 | 2017-12-22 | 宝钢工程技术集团有限公司 | A kind of shaft furnace inlet duct and shaft furnace air inlet method |
| CN110305998A (en) * | 2019-06-28 | 2019-10-08 | 武汉钢铁有限公司 | The online regulation method and device of S content in a kind of reduction blast furnace gas |
| CN110655959A (en) * | 2019-11-11 | 2020-01-07 | 新疆八一钢铁股份有限公司 | Gas CO removal for Ou smelting furnace2Device for measuring the position of a moving object |
| CN113913579A (en) * | 2021-10-12 | 2022-01-11 | 中冶赛迪工程技术股份有限公司 | Circulation method for cooling hot sponge iron |
| CN115449579A (en) * | 2022-08-23 | 2022-12-09 | 攀钢集团西昌钢钒有限公司 | Low-carbon smelting reduction iron-making method and device |
| CN115491453A (en) * | 2022-08-23 | 2022-12-20 | 攀钢集团西昌钢钒有限公司 | PLCsmelt smelting reduction iron-making method and device |
| CN115558733A (en) * | 2022-09-21 | 2023-01-03 | 宝钢工程技术集团有限公司 | Gas utilization device for COREX smelting reduction furnace and use method thereof |
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| CN1123330A (en) * | 1995-09-19 | 1996-05-29 | 冶金工业部重庆钢铁设计研究院 | Composite furnace device |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102365374A (en) * | 2009-04-03 | 2012-02-29 | 保尔伍斯股份有限公司 | Method and installation for producing direct reduced iron |
| CN101603109B (en) * | 2009-07-07 | 2011-01-05 | 中冶赛迪工程技术股份有限公司 | Process for treating top gas of reduction shaft furnace |
| CN101935730B (en) * | 2009-10-22 | 2011-11-16 | 中冶赛迪工程技术股份有限公司 | Furnace top charging process in iron-making process |
| CN101935731B (en) * | 2009-10-22 | 2011-12-21 | 中冶赛迪工程技术股份有限公司 | Top charging process for iron-making process furnace |
| CN101935729B (en) * | 2009-10-22 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Top loading process for iron-smelting process furnace |
| CN103290160A (en) * | 2012-02-29 | 2013-09-11 | 宝山钢铁股份有限公司 | Process for producing direct reduced iron (DRI) by carrying out pure oxygen gasification on semicoke |
| CN103966380A (en) * | 2013-01-24 | 2014-08-06 | 宝山钢铁股份有限公司 | Method for recycling dedusted powder in shaft furnace top gas |
| CN103966380B (en) * | 2013-01-24 | 2016-06-29 | 宝山钢铁股份有限公司 | A kind of method recycling shaft furnace top coal gas dust removal powder |
| CN104611496A (en) * | 2013-11-04 | 2015-05-13 | Posco公司 | Apparatus and method for collecting dust of reducing gas |
| CN107502694B (en) * | 2017-08-16 | 2023-07-14 | 宝钢工程技术集团有限公司 | Shaft furnace air inlet device and shaft furnace air inlet method |
| CN107502694A (en) * | 2017-08-16 | 2017-12-22 | 宝钢工程技术集团有限公司 | A kind of shaft furnace inlet duct and shaft furnace air inlet method |
| CN110305998A (en) * | 2019-06-28 | 2019-10-08 | 武汉钢铁有限公司 | The online regulation method and device of S content in a kind of reduction blast furnace gas |
| CN110305998B (en) * | 2019-06-28 | 2021-03-16 | 武汉钢铁有限公司 | Online regulation and control method and device for reducing S content in blast furnace gas |
| CN110655959A (en) * | 2019-11-11 | 2020-01-07 | 新疆八一钢铁股份有限公司 | Gas CO removal for Ou smelting furnace2Device for measuring the position of a moving object |
| CN110655959B (en) * | 2019-11-11 | 2024-05-14 | 新疆八一钢铁股份有限公司 | CO is removed to ouye stove gas2Device and method for controlling the same |
| CN113913579A (en) * | 2021-10-12 | 2022-01-11 | 中冶赛迪工程技术股份有限公司 | Circulation method for cooling hot sponge iron |
| CN115449579A (en) * | 2022-08-23 | 2022-12-09 | 攀钢集团西昌钢钒有限公司 | Low-carbon smelting reduction iron-making method and device |
| CN115491453A (en) * | 2022-08-23 | 2022-12-20 | 攀钢集团西昌钢钒有限公司 | PLCsmelt smelting reduction iron-making method and device |
| CN115491453B (en) * | 2022-08-23 | 2023-12-19 | 攀钢集团西昌钢钒有限公司 | PLCsmelt smelting reduction iron-making method and device |
| CN115449579B (en) * | 2022-08-23 | 2023-12-19 | 攀钢集团西昌钢钒有限公司 | Low-carbon smelting reduction iron-making method and device |
| CN115558733A (en) * | 2022-09-21 | 2023-01-03 | 宝钢工程技术集团有限公司 | Gas utilization device for COREX smelting reduction furnace and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN101386897B (en) | 2014-01-15 |
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