CN109338024A - A kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas - Google Patents
A kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas Download PDFInfo
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- CN109338024A CN109338024A CN201811344250.1A CN201811344250A CN109338024A CN 109338024 A CN109338024 A CN 109338024A CN 201811344250 A CN201811344250 A CN 201811344250A CN 109338024 A CN109338024 A CN 109338024A
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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
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
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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
- C21B13/0073—Selection or treatment of the reducing gases
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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
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The invention discloses a kind of direct-reduction techniques using coal gas of converter and producing sponge iron by using coke oven gas, it is characterized by: entering converter coal gas flue through petticoat pipe from the high temperature coal gas of converter that converter is discharged, in the way of coal gas blowing, coke-stove gas after purification, desulfurization is added in converter coal gas flue, the CH in coke-stove gas is utilized4With the CO in coal gas of converter2The reformation endothermic reaction of generation, so that the gas temperature in converter coal gas flue is dropped rapidly to 850 DEG C~900 DEG C, 850 DEG C~900 DEG C of the coal gas of high temperature come out from converter coal gas flue enters gas base directly reducing reduction shaft furnace iron ore after hot cyclone dust removal and produces sponge iron, and generates shaft furnace stock gas.The present invention takes full advantage of the sensible heat of high temperature coal gas of converter to prepare needed for gas base directly reducing shaft furnace also Primordial Qi, carries out the production of sponge iron, and process flow is simple, energy consumption and equipment investment are lower, and overall technology, economic advantages are fairly obvious.
Description
Technical field
This patent belongs to the technical field of direct reduction iron making, is to produce sponge for using coal gas of converter and coke-stove gas
A kind of direct-reduction technique of iron.
Background technique
The comprehensive utilization of iron and steel enterprise by-product coke-stove gas, coal gas of converter is always the Important Problems that iron and steel enterprise is concerned about.
Meanwhile nearly 5-10, with the substantial increase of China's scrap accumulation, steel scrap/sponge iron (DRI)-electric furnace mini-mill steelmaking
Yield starts to increase year by year, and the demand of sponge iron is increasingly increased.In consideration of it, the characteristics of being based on China's steel industry, domestic
The outer coke-stove gas for using iron and steel enterprise's by-product, coal gas of converter produce sponge iron and have carried out relevant research, mainly sharp
Enter gas base directly reducing shaft furnace production sponge iron with the also Primordial Qi based on coke-stove gas or coal gas of converter preparation, and proposes phase
The process route answered.In terms of the key point and difficult point of this kind of technique are heated by gas, need that coke-stove gas or converter will be based on
Coal gas handle also Primordial Qi be heated to 900 DEG C~1000 DEG C, heating temperature is high, device for simultaneous heating need to consider CO with
And CH4Analysis carbon, the design difficulty of device is big, equipment investment is high；It is this kind of meanwhile for utilizing producing sponge iron by using coke oven gas
Technique is designed with greatly coal gas reformation and coal gas decarburization unit, and process route is complex, operation energy consumption is high, equipment investment is higher；
In addition, this kind of process requirement first cools down 1400 DEG C~1650 DEG C of coal gas of converter for producing sponge iron using coal gas of converter,
Carry out gas conversion, coal gas decarburization again to obtain suitable H2/ CO ratio also Primordial Qi, then will also Primordial Qi be heated to 900 DEG C~
1000 DEG C, technical process process is long, investment is big and energy consumption is high.
In conclusion there are processes to answer for current process route for producing sponge iron using coke-stove gas, coal gas of converter
How miscellaneous, the deficiencies of energy consumption is high, equipment investment is big shortens process flow, reduces process energy consumption, reduces equipment investment, be to utilize
The key point of coke-stove gas, coal gas of converter production sponge iron.
Summary of the invention
It is an object of the invention to: for currently with coke-stove gas, coal gas of converter production sponge iron process flow it is complicated,
The problems such as energy consumption is high, equipment investment is big, proposes a kind of direct-reduction using coal gas of converter and producing sponge iron by using coke oven gas
Technique, the CH in the technology utilization coke-stove gas4In converter coal gas flue with the CO in high temperature coal gas of converter2The reformation of generation
The endothermic reaction carries out the production of sponge iron to obtain needed for gas base directly reducing shaft furnace also Primordial Qi, and process flow is simple, energy
Consumption and equipment investment are lower.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas: the high temperature converter coal being discharged from converter
Gas enters converter coal gas flue through petticoat pipe, in the way of coal gas blowing, the coke-stove gas after purification, desulfurization is added and is turned
In producer gas flue, the CH in coke-stove gas is utilized4With the CO in coal gas of converter2The reformation endothermic reaction of generation, so that converter coal
Gas temperature in gas flue is dropped rapidly to 850 DEG C~900 DEG C, 850 DEG C~900 DEG C of the height come out from converter coal gas flue
Warm coal gas enters gas base directly reducing reduction shaft furnace iron ore after hot cyclone dust removal and produces sponge iron, and generates vertical furnace top coal
Gas.
Further, the high temperature coal gas of converter being discharged from converter, temperature range are 1400 DEG C~1650 DEG C.
Further, the coke-stove gas after purification, desulfurization, temperature range are 25 DEG C~50 DEG C.
Further, the coke-stove gas after purification, desulfurization, H2S content is less than 20ppm.
Further, the coke-stove gas by after purification, desulfurization is added in converter coal gas flue, the coke oven of addition
The gas volume of coal gas is the 22.5%~32.5% of the high temperature coal gas of converter occurrence quantity being discharged from converter.
Further, the CH using in coke-stove gas4With the CO in coal gas of converter2The reformation endothermic reaction of generation,
Reaction equation is CH4+CO2=2CO+2H2。
Further, the gas base directly reducing shaft furnace, operating pressure are 6kPa (G)~10kPa (G).
Further, the shaft furnace stock gas is cooled to 150 DEG C by heat exchanger after rough dedusting, then drops through dedusting
It is exported after warm device dedusting cooling as output coal gas.
Further, the shaft furnace stock gas after dedusting, cooling is exported as output coal gas, coal gas low heating value
For 6500kJ/Nm3~7500kJ/Nm3。
Beneficial effects of the present invention include following several respects.
1) coke-stove gas after purification, desulfurization is added in converter coal gas flue the present invention, using in coke-stove gas
CH4In converter coal gas flue with the CO in high temperature coal gas of converter (1400 DEG C~1650 DEG C)2CH occurs4+CO2=2CO+2H2's
The endothermic reaction is reformed, coal gas CO is being reduced2Content improves coal gas CO and H2Make the coal gas in converter coal gas flue while content
Rapid drop in temperature goes back Primordial Qi to 850 DEG C~900 DEG C, to obtain needed for gas base directly reducing shaft furnace, carry out the life of sponge iron
It produces.The sensible heat of process makes full use high temperature coal gas of converter carries out the preparation of gas-based shaft kiln also Primordial Qi, while in coke-stove gas
H2And above-mentioned CH4+CO2=2CO+2H2Reform the H that the endothermic reaction generates2It can guarantee the H in also Primordial Qi2Content makes also Primordial Qi
With preferable reducing property, the links such as coal gas reformation, gas conversion, coal gas decarburization and heated by gas are avoided, process is simple,
Energy consumption and equipment investment are lower, and overall technology, economic advantages are fairly obvious.
2) present invention utilizes the CH in coke-stove gas4In converter coal gas flue with the CO in high temperature coal gas of converter2Occur
The reformation endothermic reaction, to obtain needed for gas base directly reducing shaft furnace also Primordial Qi.Into the high temperature coal gas of converter of converter flue
The FeO for containing about 70% or so in the dust of carrying, with the CH in coke-stove gas in converter coal gas flue4With high temperature converter
CO in coal gas2The reformation endothermic reaction of generation, the CO of coal gas2Content reduces CO and H simultaneously2Content improves, the reproducibility of coal gas
It can rise rapidly, the FeO in coal gas of converter dust-laden will be reduced into simple substance Fe, Fe pairs of the simple substance just restored under hot environment
CH4With CO2Reforming reaction have preferable catalytic, utilize the simple substance Fe's being reduced out of the FeO in high temperature coal gas of converter dust-laden
Catalytic guarantees the CH in converter coal gas flue4With CO2The effect of reforming reaction avoids carrying out gas temperature with reforming reaction
The influence of the factors such as the decline of reaction rate caused by declining, is met needed for gas base directly reducing reduction shaft furnace iron ore with obtaining
Also Primordial Qi.
3) it compares for traditional coal gas of converter temperature reduction technology (converter coal gas flue cooling+waste heat boiler), present invention process
The sensible heat of high temperature coal gas of converter is taken full advantage of, converter coal gas flue cooling system and coal gas of converter heat recovery can be saved
Afterheat boiler system, equipment investment, land occupation, in terms of for it is with the obvious advantage.Meanwhile comparing traditional coal gas of converter heat
Amount recycling generates for steam, and present invention process utilizes the CH in coke-stove gas4In converter coal gas flue with high temperature converter coal
CO in gas2The reformation endothermic reaction of generation, to obtain the also life of Primordial Qi progress sponge iron needed for gas base directly reducing shaft furnace
It produces, heating efficiency is high, and added value of product is high, and advantage is fairly obvious.In addition, present invention process will be perpendicular after dedusting, cooling
Furnace stock gas is exported as output coal gas, and the low heat value of output coal gas is 6500kJ/Nm3~7500kJ/Nm3, it is much higher than blast furnace
Coal gas low heating value, for Gas In Iron And Steel Works user use.
Detailed description of the invention
Fig. 1 is a kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas of the present invention
Flow diagram.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown, a kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas of the present embodiment,
The following steps are included:
1) enter converter coal gas flue through petticoat pipe from the high temperature coal gas of converter that converter is discharged, it, will be through in the way of coal gas blowing
Coke-stove gas after crossing purification, desulfurization is added in converter coal gas flue, utilizes the CH in coke-stove gas4With the CO in coal gas of converter2
The reformation endothermic reaction of generation, so that the gas temperature in converter coal gas flue is dropped rapidly to 850 DEG C~900 DEG C, from converter
850 DEG C~900 DEG C of the coal gas of high temperature that coal gas flue comes out enters gas base directly reducing reduction shaft furnace iron after hot cyclone dust removal
Ore produces sponge iron, and generates shaft furnace stock gas.
2) above-mentioned steps 1) in, the high temperature coal gas of converter being discharged from converter, temperature range is 1400 DEG C~1650 DEG C.
3) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization, temperature range is 25 DEG C~50 DEG C, simultaneously
Its H2S content is less than 20ppm.
4) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization is added in converter coal gas flue, addition
The gas volume of coke-stove gas is the 22.5%~32.5% of the high temperature coal gas of converter occurrence quantity being discharged from converter.
5) above-mentioned steps 1) in, utilize the CH in coke-stove gas4With the CO in coal gas of converter2The reformation heat absorption of generation is anti-
It answers, reaction equation CH4+CO2=2CO+2H2。
6) above-mentioned steps 1) in, the operating pressure of gas base directly reducing shaft furnace is 6kPa (G)~10kPa (G).
7) above-mentioned steps 1) in, shaft furnace stock gas is cooled to 150 DEG C after rough dedusting, through heat exchanger, then through dedusting
It is exported after cooling device dedusting cooling as output coal gas, while the low heat value of output coal gas is 6500kJ/Nm3~7500kJ/
Nm3。
The present invention utilizes the CH in coke-stove gas4In converter coal gas flue with the CO in high temperature coal gas of converter2The weight of generation
The whole endothermic reaction goes back Primordial Qi to obtain, carries out the production of sponge iron needed for gas base directly reducing shaft furnace.Process makes full use
The sensible heat of high temperature coal gas of converter carries out the preparation of gas-based shaft kiln also Primordial Qi, while the H in coke-stove gas2And above-mentioned CH4With
CO2Reform the H that the endothermic reaction generates2It can guarantee the H in also Primordial Qi2Content makes also Primordial Qi have preferable reducing property, avoids
The links such as coal gas reformation, gas conversion, coal gas decarburization and heated by gas, process is simple, energy consumption and equipment investment are lower, whole
Technology, economic advantages are fairly obvious.
First embodiment:
1) enter converter coal gas flue through petticoat pipe from the high temperature coal gas of converter that converter is discharged, it, will be through in the way of coal gas blowing
Coke-stove gas after crossing purification, desulfurization is added in converter coal gas flue, utilizes the CH in coke-stove gas4With the CO in coal gas of converter2
The reformation endothermic reaction of generation, so that the gas temperature in converter coal gas flue is dropped rapidly to 850 DEG C, from converter coal gas flue
850 DEG C of coal gas of high temperature out enters gas base directly reducing reduction shaft furnace iron ore after hot cyclone dust removal and produces sponge iron,
And generate shaft furnace stock gas.
2) above-mentioned steps 1) in, the high temperature coal gas of converter being discharged from converter, temperature is 1400 DEG C.
3) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization, temperature is 25 DEG C, while its H2S content
For 18ppm.
4) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization is added in converter coal gas flue, addition
The gas volume of coke-stove gas is the 22.5% of the high temperature coal gas of converter occurrence quantity being discharged from converter.
5) above-mentioned steps 1) in, utilize the CH in coke-stove gas4With the CO in coal gas of converter2The reformation heat absorption of generation is anti-
It answers, reaction equation CH4+CO2=2CO+2H2。
6) above-mentioned steps 1) in, the operating pressure of gas base directly reducing shaft furnace is 6kPa (G).
7) above-mentioned steps 1) in, shaft furnace stock gas is cooled to 150 DEG C after rough dedusting, through heat exchanger, then through dedusting
It is exported after cooling device dedusting cooling as output coal gas, while the low heat value of output coal gas is 6500kJ/Nm3。
The present embodiment utilizes the CH in coke-stove gas4In converter coal gas flue with the CO in high temperature coal gas of converter2Occur
The endothermic reaction is reformed, Primordial Qi is gone back needed for gas base directly reducing shaft furnace to prepare, carries out the production of sponge iron.Process makes full use
The sensible heat of high temperature coal gas of converter, while utilizing the H in coke-stove gas2And CH4With CO2The H that reforming reaction generates2To guarantee
H also in Primordial Qi2Content makes also Primordial Qi have a preferable reducing property, and process is simple, energy consumption and equipment investment are lower, advantage
It is fairly obvious.
Second embodiment:
1) enter converter coal gas flue through petticoat pipe from the high temperature coal gas of converter that converter is discharged, it, will be through in the way of coal gas blowing
Coke-stove gas after crossing purification, desulfurization is added in converter coal gas flue, utilizes the CH in coke-stove gas4With the CO in coal gas of converter2
The reformation endothermic reaction of generation, so that the gas temperature in converter coal gas flue is dropped rapidly to 875 DEG C, from converter coal gas flue
875 DEG C of coal gas of high temperature out enters gas base directly reducing reduction shaft furnace iron ore after hot cyclone dust removal and produces sponge iron,
And generate shaft furnace stock gas.
2) above-mentioned steps 1) in, the high temperature coal gas of converter being discharged from converter, temperature is 1525 DEG C.
3) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization, temperature is 40 DEG C, while its H2S content
For 15ppm.
4) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization is added in converter coal gas flue, addition
The gas volume of coke-stove gas is the 27.5% of the high temperature coal gas of converter occurrence quantity being discharged from converter.
5) above-mentioned steps 1) in, utilize the CH in coke-stove gas4With the CO in coal gas of converter2The reformation heat absorption of generation is anti-
It answers, reaction equation CH4+CO2=2CO+2H2。
6) above-mentioned steps 1) in, the operating pressure of gas base directly reducing shaft furnace is 8kPa (G).
7) above-mentioned steps 1) in, shaft furnace stock gas is cooled to 150 DEG C after rough dedusting, through heat exchanger, then through dedusting
It is exported after cooling device dedusting cooling as output coal gas, while the low heat value of output coal gas is 7000kJ/Nm3。
The present embodiment utilizes the CH in coke-stove gas4In converter coal gas flue with the CO in high temperature coal gas of converter2Occur
The endothermic reaction is reformed, Primordial Qi is gone back needed for gas base directly reducing shaft furnace to prepare, carries out the production of sponge iron.Process makes full use
The sensible heat of high temperature coal gas of converter, while utilizing the H in coke-stove gas2And CH4With CO2The H that reforming reaction generates2To guarantee
H also in Primordial Qi2Content makes also Primordial Qi have a preferable reducing property, and process is simple, energy consumption and equipment investment are lower, advantage
It is fairly obvious.
3rd embodiment:
1) enter converter coal gas flue through petticoat pipe from the high temperature coal gas of converter that converter is discharged, it, will be through in the way of coal gas blowing
Coke-stove gas after crossing purification, desulfurization is added in converter coal gas flue, utilizes the CH in coke-stove gas4With the CO in coal gas of converter2
The reformation endothermic reaction of generation, so that the gas temperature in converter coal gas flue is dropped rapidly to 900 DEG C, from converter coal gas flue
900 DEG C of coal gas of high temperature out enters gas base directly reducing reduction shaft furnace iron ore after hot cyclone dust removal and produces sponge iron,
And generate shaft furnace stock gas.
2) above-mentioned steps 1) in, the high temperature coal gas of converter being discharged from converter, temperature is 1650 DEG C.
3) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization, temperature is 50 DEG C, while its H2S content
For 10ppm.
4) above-mentioned steps 1) in, the coke-stove gas after purification, desulfurization is added in converter coal gas flue, addition
The gas volume of coke-stove gas is the 32.5% of the high temperature coal gas of converter occurrence quantity being discharged from converter.
5) above-mentioned steps 1) in, utilize the CH in coke-stove gas4With the CO in coal gas of converter2The reformation heat absorption of generation is anti-
It answers, reaction equation CH4+CO2=2CO+2H2。
6) above-mentioned steps 1) in, the operating pressure of gas base directly reducing shaft furnace is 10kPa (G).
7) above-mentioned steps 1) in, shaft furnace stock gas is cooled to 150 DEG C after rough dedusting, through heat exchanger, then through dedusting
It is exported after cooling device dedusting cooling as output coal gas, while the low heat value of output coal gas is 7500kJ/Nm3。
The present embodiment utilizes the CH in coke-stove gas4In converter coal gas flue with the CO in high temperature coal gas of converter2Occur
The endothermic reaction is reformed, Primordial Qi is gone back needed for gas base directly reducing shaft furnace to prepare, carries out the production of sponge iron.Process makes full use
The sensible heat of high temperature coal gas of converter, while utilizing the H in coke-stove gas2And CH4With CO2The H that reforming reaction generates2To guarantee
H also in Primordial Qi2Content makes also Primordial Qi have a preferable reducing property, and process is simple, energy consumption and equipment investment are lower, advantage
It is fairly obvious.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (4)
1. a kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas, it is characterised in that: arranged from converter
High temperature coal gas of converter out enters converter coal gas flue through petticoat pipe, will be after purification, desulfurization in the way of coal gas blowing
Coke-stove gas is added in converter coal gas flue, utilizes the CH in coke-stove gas4With the CO in coal gas of converter2The reformation of generation is absorbed heat
Reaction comes out so that the gas temperature in converter coal gas flue is dropped rapidly to 850 DEG C~900 DEG C from converter coal gas flue
850 DEG C~900 DEG C of coal gas of high temperature enters gas base directly reducing reduction shaft furnace iron ore after hot cyclone dust removal and produces sponge iron,
And generate shaft furnace stock gas；
The high temperature coal gas of converter being discharged from converter, temperature range are 1400 DEG C~1650 DEG C；
The coke-stove gas after purification, desulfurization, temperature range are 25 DEG C~50 DEG C；
The coke-stove gas after purification, desulfurization, H2S content is less than 20ppm；
Described the coke-stove gas after purification, desulfurization is added in converter coal gas flue, the coal gas of the coke-stove gas of addition
Amount is the 22.5%~32.5% of the high temperature coal gas of converter occurrence quantity being discharged from converter；
Described utilizes the CH in coke-stove gas4With the CO in coal gas of converter2The reformation endothermic reaction of generation, reaction equation
For CH4+CO2=2CO+2H2。
2. a kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas according to claim 1,
It is characterized by: the gas base directly reducing shaft furnace, operating pressure is 6kPa (G)~10kPa (G).
3. a kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas according to claim 1,
It is characterized by: the shaft furnace stock gas is cooled to 150 DEG C after rough dedusting, through heat exchanger, then cools down through dedusting and fill
It is exported after setting dedusting cooling as output coal gas.
4. a kind of direct-reduction technique using coal gas of converter and producing sponge iron by using coke oven gas according to claim 3,
It is characterized by: the shaft furnace stock gas after dedusting, cooling is exported as output coal gas, coal gas low heating value is
6500kJ/Nm3~7500kJ/Nm3。
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961783A (en) * | 2020-07-29 | 2020-11-20 | 辽宁科技大学 | Sponge iron production system and production process |
| CN112458226A (en) * | 2020-11-04 | 2021-03-09 | 中冶赛迪技术研究中心有限公司 | Method for controlling sulfur content of direct reduced iron |
| CN113501494A (en) * | 2021-07-07 | 2021-10-15 | 山西晋南钢铁集团有限公司 | Self-reforming system and method for coke oven gas for blast furnace iron making |
| CN114774611A (en) * | 2022-03-31 | 2022-07-22 | 中晋冶金科技有限公司 | Hydrogen rich gas CO2Method for producing iron by oxidation conversion and hydrogen-based shaft furnace direct reduction |
| CN114807486A (en) * | 2022-03-31 | 2022-07-29 | 中晋冶金科技有限公司 | CO (carbon monoxide) 2 Oxidative coupling of CH 4 Method and device for converting hydrogen production base shaft furnace reducing gas |
| CN115074477A (en) * | 2022-06-27 | 2022-09-20 | 盐城市联鑫钢铁有限公司 | Short-process low-carbon smelting process for high-quality steel |
| CN115305123A (en) * | 2022-07-27 | 2022-11-08 | 中钢设备有限公司 | Method and device for directly purifying and reducing coke oven gas in DRI preheating process |
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| CN112458226A (en) * | 2020-11-04 | 2021-03-09 | 中冶赛迪技术研究中心有限公司 | Method for controlling sulfur content of direct reduced iron |
| CN113501494A (en) * | 2021-07-07 | 2021-10-15 | 山西晋南钢铁集团有限公司 | Self-reforming system and method for coke oven gas for blast furnace iron making |
| CN114774611A (en) * | 2022-03-31 | 2022-07-22 | 中晋冶金科技有限公司 | Hydrogen rich gas CO2Method for producing iron by oxidation conversion and hydrogen-based shaft furnace direct reduction |
| CN114807486A (en) * | 2022-03-31 | 2022-07-29 | 中晋冶金科技有限公司 | CO (carbon monoxide) 2 Oxidative coupling of CH 4 Method and device for converting hydrogen production base shaft furnace reducing gas |
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