CN102851426A - Direct reduction process for producing spongy iron from CH4-rich coal gas - Google Patents
Direct reduction process for producing spongy iron from CH4-rich coal gas Download PDFInfo
- Publication number
- CN102851426A CN102851426A CN2012103791443A CN201210379144A CN102851426A CN 102851426 A CN102851426 A CN 102851426A CN 2012103791443 A CN2012103791443 A CN 2012103791443A CN 201210379144 A CN201210379144 A CN 201210379144A CN 102851426 A CN102851426 A CN 102851426A
- Authority
- CN
- China
- Prior art keywords
- gas
- rich
- temperature
- direct
- sponge iron
- 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
Links
Images
Classifications
-
- 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]
Landscapes
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a direct reduction process for producing spongy iron from CH4-rich coal gas, which comprises the following steps: a, inputting CH4-rich coal gas subjected to pressure regulation and gas-based shaft furnace top gas sequentially subjected to cooling, dust removal and pressurization treatment into an outer converter, supplementing steam taken as modification reaction oxidizer of CH4 into the outer converter, and enabling CH4, H2O and CO2 in the outer converter to be subjected to modification reaction under the effect of a catalyst to generate high-temperature reducing coal gas mainly containing CO and H2; and b, inputting the high-temperature reducing coal gas generated in the outer converter into a gas-based shaft furnace to directly reduce iron ores to generate spongy iron. According to the invention, CO2 in the top gas is fully utilized to generate CO so as to provide reducing gas, thereby reducing the discharge of CO2, omitting the coal gas decarburization procedure and ensuring that the process is simple; and CH4 in the raw gas is subjected to thorough reaction, and the temperature of the high-temperature reducing coal gas is controlled at 850 DEG C, thereby realizing that the utilization efficiency of the raw gas is high, and avoiding the problems of blockage and shaft furnace cementation caused by a great amount of carbon precipitate of CH4 at high temperature.
Description
Technical field
The present invention relates to field of metallurgy, particularly a kind of steel industry direct-reduction is produced the technique of sponge iron.
Background technology
Iron And Steel Industry is the basic industry of national economy, also is the key industry of China's energy consumption and disposal of pollutants.For accelerating STEEL INDUSTRY CONSTRUCTION ADJUSTMENT and industrial upgrading, change the Iron And Steel Industry development pattern, promote saving, cleaning and Sustainable development, the conducts such as country proposes " to strengthen non-blast-furnace smelting-steel-making, the brand-new flow process cleaner technology research and development of refining-Direct Rolling and test " in " steel industry adjustment and development planning " advance the key task of whole industry energy-saving and emission-reduction, the cleaner production of carrying out in an all-round way.
Direct-reduction technique is to realize the short flow process of Iron and Steel Production, the i.e. important step of steel scrap/sponge iron (DRI)-electric furnace flow process as typical non-blast furnace ironmaking technique.The unstripped gas of gas-based shaft kiln directly reduced technique can adopt the methane rich coal gas such as Sweet natural gas, coke-oven gas, coal-seam gas, blue carbon emission gas, for the resources characteristic of the few Sweet natural gas of the many coals of China, the direct-reduction technique that the methane rich coal gas such as development utilization coke-oven gas, coal-seam gas, blue carbon emission gas add the maximization shaft furnace has comparatively broad market outlook.
At present domesticly for gas-based shaft kiln directly reduced techniques of methane rich coal gas such as coke-oven gas corresponding technological line has been proposed, main have following a few class: the vertical furnace top gas after 1) Zhongye Saidi Engineering Technology Co., Ltd proposes to utilize coke-oven gas and purifies decarburization reheats behind the humidification to about 1000 ℃ and enters the reduction shaft furnace iron ore together.The key of this technological line is to utilize the katalysis of high temperature and sponge iron, makes part CH
4The upgrading reaction occurs generate CO+H
2Replenish reducing gas, but operational path needs decarburization and the temperature raising of spray oxygen, controls bad sponge iron such as reducing gas atmosphere simultaneously under the temperature about 1000 ℃ and easily coheres.2) after the refreshing mist in Beijing proposes to utilize oxygen, coke-oven gas, carbonic acid gas, steam to transform, again with the top gas mixing, ℃ enter the reduction shaft furnace iron ore through desulfurization and decarburization post-heating to 800 in converter, require simultaneously H
2/ CO〉1.5.This technological line operational path is complicated, and oxygen consumption is many, and the coal gas of high temperature after transforming is simultaneously lowered the temperature first and reheated, and the crude fuel utilising efficiency is lower.3) smelting east proposes to utilize the top gas after coke-oven gas and purification, the cooling to mix in, is heated to 900 ℃～950 ℃ and makes the CH in the coke-oven gas in process furnace
4With the CO in the top gas
2And H
2O reacts, and generates CO+H
2After enter the reduction shaft furnace iron ore.H in the top gas of this technological line existence after purifying and cooling
2O, CO
2Lower Deng oxygenate content, be not enough to coke-oven gas in CH
4Reaction causes CH
4In process furnace, analyse in a large number carbon and stop up boiler tube, simultaneously CH under 900 ℃～950 ℃ temperature
4With H
2O, CO
2Reaction insufficient, enter CH easily occur under the catalysis of high temperature (900 ℃～950 ℃) and sponge iron behind the shaft furnace
4The carbon of analysing in a large number cause and cohere, this is at coke-oven gas CH
4It is more obvious when too high levels or unstripped gas are Sweet natural gas.
In sum, all there are the problems such as technical process is long, conversion process is complicated, conversion is insufficient, shaft furnace easily coheres in domestic technological line for gas-based shaft kiln directly reduced techniques of methane rich coal gas such as Sweet natural gas, coke-oven gas at present.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of rich CH that utilizes
4The direct-reduction technique of gas production sponge iron, the deficiency that exists to solve existing direct-reduction technique; The form of the outside converter catalyzed conversion of this process using is with rich CH
4Unstripped gas and the stock gas of cooling after the dedusting externally carry out the conversion upgrading reaction of methane in the converter, take full advantage of the CO in the stock gas
2Produce CO reducing gas is provided, reduce CO
2Discharging; To fill into as oxygenant by the steam that the top gas interchanger produces simultaneously, the amount that fills into is by rich CH
4CH in the unstripped gas
4Content determines; Control in addition outside converter temperature out about 850 ℃, reduce fuel gas consumption, prevent that sponge iron from cohering.
The present invention utilizes rich CH
4The direct-reduction technique of gas production sponge iron may further comprise the steps:
A is with the rich CH after pressure regulation
4Coal gas and successively through cooling, dedusting, and pressure treatment after the gas-based shaft kiln top gas input outside converter, and in outside converter, replenish as CH
4The steam of upgrading reaction oxygenant occurs, and makes the CH in the outside converter
4, H
2O and CO
2Upgrading reaction generation occurs under catalyst action mainly comprise CO and H
2Reducing gas;
B, the high temperature reduction coal gas that generates in outside converter input gas-based shaft kiln directly reduced iron ore is generated sponge iron.
Further, described outside converter adopts the mode of catalyzed conversion, and the temperature of the reducing gas of outside converter outlet is 850 ℃;
Further, the processing of in interchanger, lowering the temperature of the gas-based shaft kiln top gas among the described step a, the steam among the described step a is the steam that interchanger produces;
Further, the gas-based shaft kiln top gas of processing through interchanger cooling among the described step a is transfused to and carries out dust removal process in the wet scrubbing system, gas-based shaft kiln top gas part input press after dust removal process is carried out pressure treatment, and another part is as the fuel output of outside converter;
Further, described interchanger is inputted the low-pressure steam that the steam of outside converter is 180 ℃ of pressure 1.0MPa, temperature;
Further, the temperature of the vertical furnace top gas of described interchanger input wet scrubbing system is 150 ℃;
Further, described rich CH
4Coal gas is Sweet natural gas or coke-oven gas.
Beneficial effect of the present invention: the present invention utilizes rich CH
4The direct-reduction technique of gas production sponge iron mainly contains following advantage:
1, adopts the mode of outside converter catalyzed conversion, with rich CH
4Coal gas and through cooling, dedusting, and pressurization after top gas externally carry out the conversion upgrading reaction of methane in the converter, take full advantage of the CO in the stock gas
2Produce CO reducing gas is provided, can reduce CO
2Discharging; This processing technology routine has saved coal gas decarburization link simultaneously, and technique is simple, invests, consumes less.
2, externally in the converter, will fill into outside converter as oxygenant by the steam that interchanger produces, the amount that fills into is by rich CH
4CH in the coal gas
4Content determines, controls in addition outside converter temperature out about 850 ℃, can reduce fuel gas consumption, prevents that sponge iron from cohering.
3, adopt the mode of outside converter catalyzed conversion, by filling into of quantity of steam, make the CH in the unstripped gas
4Fully reaction can improve the unstripped gas utilising efficiency, eliminates CH
4The carbon of analysing in a large number at high temperature causes and stops up and problem that shaft furnace coheres.
Description of drawings
Fig. 1 is that the present invention utilizes rich CH
4The process flow sheet of the direct-reduction technique of gas production sponge iron.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in the figure, the present embodiment utilizes rich CH
4The direct-reduction technique of gas production sponge iron may further comprise the steps:
May further comprise the steps:
A is with the rich CH after pressure regulation
4Coal gas and successively through cooling, dedusting, and pressure treatment after the gas-based shaft kiln top gas input outside converter 1, and in outside converter 1, replenish as CH
4The steam of upgrading reaction oxygenant occurs, and makes the CH in the outside converter 1
4, H
2O and CO
2Upgrading reaction generation occurs under catalyst action mainly comprise CO and H
2Reducing gas;
B, the high temperature reduction coal gas input gas-based shaft kiln 2 direct-reduction iron ores that generate in the outside converter 1 are generated sponge iron.
The present embodiment utilizes rich CH
4The direct-reduction technique of gas production sponge iron, it adopts the mode of outside converter catalyzed conversion, with rich CH
4Coal gas and through cooling, dedusting, and pressurization after top gas externally carry out the conversion upgrading reaction of methane in the converter, take full advantage of the CO in the stock gas
2Produce CO reducing gas is provided, can reduce CO
2Discharging; This processing technology routine has saved coal gas decarburization link simultaneously, and technique is simple, invests, consumes less.
Adopt simultaneously the mode of outside converter catalyzed conversion, by in outside converter, filling into oxygenant, make the CH in the unstripped gas
4Fully reaction can improve the unstripped gas utilising efficiency, eliminates CH
4The carbon of analysing in a large number at high temperature causes and stops up and problem that shaft furnace coheres.
As the improvement to the present embodiment, described outside converter 1 adopts the mode of catalyzed conversion, and the temperature of the reducing gas of outside converter outlet is 850 ℃, and the temperature of reducing gas is controlled to 850 ℃, can reduce outside converter to the consumption of fuel gas, and prevent that sponge iron from cohering.
As the improvement to the present embodiment, the processing of in interchanger 3, lowering the temperature of the gas-based shaft kiln top gas among the described step a, the steam among the described step a is the steam that interchanger 3 produces; This step is utilized as a supplement oxygenant of steam that interchanger 3 produces, can improve the utilization ratio to gas-based shaft kiln top gas heat, and can avoid replenishing and CH by other approach
4The shortcoming of the existing complex process of oxygenant of reaction.
As the improvement to the present embodiment, the gas-based shaft kiln top gas of processing through interchanger 3 cooling among the described step a is transfused to and carries out dust removal process in the wet scrubbing system 4, gas-based shaft kiln top gas part input press 5 after dust removal process is carried out pressure treatment, and another part is as the fuel output of outside converter 1; This step takes full advantage of the vertical furnace top gas that gas-based shaft kiln 1 produces, and gas and reduction fuel consumption can economize in raw materials.
As the improvement to the present embodiment, the steam of the outside converter of described interchanger 3 inputs is the low-pressure steam of 180 ℃ of pressure 1.0MPa, temperature, adopt low-pressure steam and unstripped gas, top gas to enter together outside converter, namely can play the effect that increases oxygenant, while is owing to the heat content of steam itself, the heat rejection that adds that can save the portion of external converter.
As the improvement to the present embodiment, the temperature that described interchanger 3 is inputted the vertical furnace top gas of wet scrubbing systems 4 is 150 ℃, with the sensible heat generation steam of abundant recovery stock gas.
As the improvement to the present embodiment, described rich CH
4Coal gas is Sweet natural gas, and unstripped gas is abundant; Certainly rich CH in different embodiments
4Coal gas also can be coke-oven gas.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. one kind is utilized rich CH
4The direct-reduction technique of gas production sponge iron is characterized in that: may further comprise the steps:
A is with the rich CH after pressure regulation
4Coal gas and successively through cooling, dedusting, and pressure treatment after the gas-based shaft kiln top gas input outside converter, and in outside converter, replenish the steam that upgrading reaction oxygenant occurs as CH4, make the CH in the outside converter
4, H
2O and CO
2Upgrading reaction generation occurs under catalyst action mainly comprise CO and H
2Reducing gas;
B, the high temperature reduction coal gas that generates in outside converter input gas-based shaft kiln directly reduced iron ore is generated sponge iron.
2. the rich CH of utilization according to claim 1
4The direct-reduction technique of gas production sponge iron is characterized in that: described outside converter adopts the mode of catalyzed conversion, and the temperature of the reducing gas of outside converter outlet is 850 ℃.
3. the rich CH of utilization according to claim 1 and 2
4The direct-reduction technique of gas production sponge iron is characterized in that: the processing of lowering the temperature in interchanger of the gas-based shaft kiln top gas among the described step a, the steam among the described step a are the steam that interchanger produces.
4. the rich CH of utilization according to claim 3
4The direct-reduction technique of gas production sponge iron, it is characterized in that: the gas-based shaft kiln top gas of processing through interchanger cooling among the described step a is transfused to and carries out dust removal process in the wet scrubbing system, gas-based shaft kiln top gas part input press after dust removal process is carried out pressure treatment, and another part is as the fuel output of outside converter.
5. the rich CH of utilization according to claim 3
4The direct-reduction technique of gas production sponge iron is characterized in that: the steam that described interchanger is inputted outside converter is the low-pressure steam of 180 ℃ of pressure 1.0MPa, temperature.
6. the rich CH of utilization according to claim 4
4The direct-reduction technique of gas production sponge iron is characterized in that: the temperature that described interchanger is inputted the vertical furnace top gas of wet scrubbing system is 150 ℃.
7. the rich CH of utilization according to claim 1
4The direct-reduction technique of gas production sponge iron is characterized in that: described rich CH
4Coal gas is Sweet natural gas or coke-oven gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103791443A CN102851426A (en) | 2012-10-09 | 2012-10-09 | Direct reduction process for producing spongy iron from CH4-rich coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103791443A CN102851426A (en) | 2012-10-09 | 2012-10-09 | Direct reduction process for producing spongy iron from CH4-rich coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102851426A true CN102851426A (en) | 2013-01-02 |
Family
ID=47398400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103791443A Pending CN102851426A (en) | 2012-10-09 | 2012-10-09 | Direct reduction process for producing spongy iron from CH4-rich coal gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102851426A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146866A (en) * | 2013-04-03 | 2013-06-12 | 中冶赛迪工程技术股份有限公司 | Direct reduction process for sponge iron production implemented by using non-catalytic conversion of CH4 |
| CN103525966A (en) * | 2013-10-08 | 2014-01-22 | 中国石油大学(北京) | Method for producing gas-based directly reduced iron by utilizing catalytic conversion of natural gas, and system thereof |
| CN103525964A (en) * | 2013-10-08 | 2014-01-22 | 中国石油大学(北京) | Method for producing gas-based directly reduced iron by utilizing catalytic conversion of coke-oven gas, and system thereof |
| CN103667573A (en) * | 2013-12-13 | 2014-03-26 | 王少立 | Short-flow process for producing direct reduction iron with assistance of coke oven gas |
| CN103834760A (en) * | 2014-02-25 | 2014-06-04 | 中国石油大学(北京) | Method and device for producing reduced iron by using synthesis gas prepared from gas |
| CN106399617A (en) * | 2016-12-16 | 2017-02-15 | 江苏省冶金设计院有限公司 | Direct reduced iron making system and method for gas-based shaft furnace |
| CN106521073A (en) * | 2016-12-16 | 2017-03-22 | 江苏省冶金设计院有限公司 | System and method for preparing direct reduced iron through top gas |
| CN106702067A (en) * | 2017-03-14 | 2017-05-24 | 江苏省冶金设计院有限公司 | System and method for preparing direct reduced iron by utilizing gas-based shaft furnace |
| CN107058663A (en) * | 2017-03-14 | 2017-08-18 | 江苏省冶金设计院有限公司 | A kind of system and method for producing DRI |
| CN107354258A (en) * | 2017-07-12 | 2017-11-17 | 北京中晋中石冶金化工技术有限公司 | A kind of BGL gasifying gas converts the system and method for production DRI through steam |
| CN109312414A (en) * | 2016-06-09 | 2019-02-05 | 首要金属科技奥地利有限责任公司 | The method being reduced directly using ventilating gas |
| CN111961783A (en) * | 2020-07-29 | 2020-11-20 | 辽宁科技大学 | Sponge iron production system and production process |
| 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 |
| CN114807485A (en) * | 2022-03-09 | 2022-07-29 | 中冶赛迪工程技术股份有限公司 | Coal gas treatment method and system for producing direct reduced iron |
| 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 |
| CN114959153A (en) * | 2022-06-14 | 2022-08-30 | 中冶赛迪工程技术股份有限公司 | Process for producing direct reduced iron by hydrogen-rich shaft furnace |
| 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 |
| CN115232904A (en) * | 2021-04-23 | 2022-10-25 | 中国石油大学(北京) | Method for producing sponge iron |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064467A (en) * | 1987-11-02 | 1991-11-12 | C.V.G. Siderurgica Del Orinoco, C.A. | Method and apparatus for the direct reduction of iron |
| JP2005105046A (en) * | 2003-09-29 | 2005-04-21 | Nippon Steel Corp | Method for desulfurizing reducing gas, method for operating blast furnace and method for using reducing gas |
| CN101643809A (en) * | 2009-05-14 | 2010-02-10 | 中冶赛迪工程技术股份有限公司 | Sponge iron production technology by coal gasification |
| JP2011140694A (en) * | 2010-01-07 | 2011-07-21 | Sumitomo Metal Ind Ltd | Method for producing preliminary reduction sintered ore, and method for operating blast furnace utilizing the ore |
| EP1774050B1 (en) * | 2004-07-30 | 2011-09-07 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same. |
| CN102268504A (en) * | 2011-08-19 | 2011-12-07 | 中冶赛迪工程技术股份有限公司 | Direct reduction process for producing sponge iron by using coke oven gas |
| CN102605133A (en) * | 2012-01-13 | 2012-07-25 | 中冶赛迪工程技术股份有限公司 | Direct reduction method for producing sponge iron by aid of coke oven gas |
-
2012
- 2012-10-09 CN CN2012103791443A patent/CN102851426A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064467A (en) * | 1987-11-02 | 1991-11-12 | C.V.G. Siderurgica Del Orinoco, C.A. | Method and apparatus for the direct reduction of iron |
| JP2005105046A (en) * | 2003-09-29 | 2005-04-21 | Nippon Steel Corp | Method for desulfurizing reducing gas, method for operating blast furnace and method for using reducing gas |
| EP1774050B1 (en) * | 2004-07-30 | 2011-09-07 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same. |
| CN101643809A (en) * | 2009-05-14 | 2010-02-10 | 中冶赛迪工程技术股份有限公司 | Sponge iron production technology by coal gasification |
| JP2011140694A (en) * | 2010-01-07 | 2011-07-21 | Sumitomo Metal Ind Ltd | Method for producing preliminary reduction sintered ore, and method for operating blast furnace utilizing the ore |
| CN102268504A (en) * | 2011-08-19 | 2011-12-07 | 中冶赛迪工程技术股份有限公司 | Direct reduction process for producing sponge iron by using coke oven gas |
| CN102605133A (en) * | 2012-01-13 | 2012-07-25 | 中冶赛迪工程技术股份有限公司 | Direct reduction method for producing sponge iron by aid of coke oven gas |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146866B (en) * | 2013-04-03 | 2014-07-23 | 中冶赛迪工程技术股份有限公司 | Direct reduction process for sponge iron production implemented by using non-catalytic conversion of CH4 |
| CN103146866A (en) * | 2013-04-03 | 2013-06-12 | 中冶赛迪工程技术股份有限公司 | Direct reduction process for sponge iron production implemented by using non-catalytic conversion of CH4 |
| CN103525966A (en) * | 2013-10-08 | 2014-01-22 | 中国石油大学(北京) | Method for producing gas-based directly reduced iron by utilizing catalytic conversion of natural gas, and system thereof |
| CN103525964A (en) * | 2013-10-08 | 2014-01-22 | 中国石油大学(北京) | Method for producing gas-based directly reduced iron by utilizing catalytic conversion of coke-oven gas, and system thereof |
| CN103667573B (en) * | 2013-12-13 | 2015-12-02 | 王少立 | Use Direct Reduction Iron Produced by Coke Oven Gas abbreviated system |
| CN103667573A (en) * | 2013-12-13 | 2014-03-26 | 王少立 | Short-flow process for producing direct reduction iron with assistance of coke oven gas |
| CN103834760A (en) * | 2014-02-25 | 2014-06-04 | 中国石油大学(北京) | Method and device for producing reduced iron by using synthesis gas prepared from gas |
| CN103834760B (en) * | 2014-02-25 | 2016-02-17 | 中国石油大学(北京) | A kind of method and device utilizing coal mine gas preparing synthetic gas production reduced iron |
| CN109312414B (en) * | 2016-06-09 | 2021-06-04 | 首要金属科技奥地利有限责任公司 | Direct reduction process using aeration gas |
| CN109312414A (en) * | 2016-06-09 | 2019-02-05 | 首要金属科技奥地利有限责任公司 | The method being reduced directly using ventilating gas |
| US11773459B2 (en) | 2016-06-09 | 2023-10-03 | Primetals Technologies Austria GmbH | Method for direct reduction using vent gas |
| CN106399617A (en) * | 2016-12-16 | 2017-02-15 | 江苏省冶金设计院有限公司 | Direct reduced iron making system and method for gas-based shaft furnace |
| CN106521073A (en) * | 2016-12-16 | 2017-03-22 | 江苏省冶金设计院有限公司 | System and method for preparing direct reduced iron through top gas |
| CN106702067A (en) * | 2017-03-14 | 2017-05-24 | 江苏省冶金设计院有限公司 | System and method for preparing direct reduced iron by utilizing gas-based shaft furnace |
| CN107058663A (en) * | 2017-03-14 | 2017-08-18 | 江苏省冶金设计院有限公司 | A kind of system and method for producing DRI |
| CN107354258A (en) * | 2017-07-12 | 2017-11-17 | 北京中晋中石冶金化工技术有限公司 | A kind of BGL gasifying gas converts the system and method for production DRI through steam |
| CN107354258B (en) * | 2017-07-12 | 2023-12-26 | 北京中晋中石冶金化工技术有限公司 | System and method for producing direct reduced iron by steam reforming of BGL gasification gas |
| CN111961783A (en) * | 2020-07-29 | 2020-11-20 | 辽宁科技大学 | Sponge iron production system and production process |
| CN115232904A (en) * | 2021-04-23 | 2022-10-25 | 中国石油大学(北京) | Method for producing sponge iron |
| CN115232904B (en) * | 2021-04-23 | 2023-11-24 | 中国石油大学(北京) | Method for producing sponge iron |
| CN114807485A (en) * | 2022-03-09 | 2022-07-29 | 中冶赛迪工程技术股份有限公司 | Coal gas treatment method and system for producing direct reduced iron |
| 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 |
| CN114959153A (en) * | 2022-06-14 | 2022-08-30 | 中冶赛迪工程技术股份有限公司 | Process for producing direct reduced iron by hydrogen-rich shaft furnace |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102851426A (en) | Direct reduction process for producing spongy iron from CH4-rich coal gas | |
| CN103146866B (en) | Direct reduction process for sponge iron production implemented by using non-catalytic conversion of CH4 | |
| CN102268504B (en) | Direct reduction process for producing sponge iron by using coke oven gas | |
| CN102010924B (en) | Method for producing directly reduced iron from coal | |
| CN101643810B (en) | Technology for producing sponge iron and high purity CO gas | |
| CN111485044B (en) | Pseudo-pure oxygen iron making and blast furnace gas recycling method and device | |
| CN101643809A (en) | Sponge iron production technology by coal gasification | |
| CN103980094A (en) | Process for preparing methanol from tail gas of calcium carbide furnace | |
| CN107115775B (en) | Iron ore sintering flue gas sectional enrichment self-heat exchange emission reduction SOxAnd NOxMethod of producing a composite material | |
| CN104313228A (en) | Direct reduction process for producing sponge iron by using CH4 non-catalytic oxygen-enriched transformation | |
| CN102605133A (en) | Direct reduction method for producing sponge iron by aid of coke oven gas | |
| CN111847381B (en) | Method and device for preparing hydrogen from industrial waste gas | |
| CN103509605B (en) | Method and device using high temperature air and high temperature steam as gasification agents for coal gas production | |
| CN112176144A (en) | Hydrogen injection iron-making shaft furnace device and method for realizing low energy consumption of hydrogen iron-making | |
| CN103525465A (en) | Coal gas production method and device using high-temperature rich oxygen and high temperature steam as gasification agent | |
| CN101481629A (en) | Fixed bed oxygen-enriched continuous gasification process | |
| CN203530252U (en) | Coal gas production device using high-temperature rich oxygen and high-temperature steam as gasifying agents | |
| CN206607252U (en) | A kind of hydrogen enters the system that gas-based reduction shaft furnace prepares DRI | |
| CN202187012U (en) | Device for enriching and using gas at top of blast furnace | |
| CN102585905B (en) | Bituminous coal fixed bed continuous gasification method | |
| CN114525518B (en) | Method for utilizing renewable energy source electricity | |
| CN101792841A (en) | CO2 recycle method for sponge iron gasification production | |
| CN205347482U (en) | System for still crude gas direct reduction is metallurgical to utilize carbide stove tail gas system | |
| CN104178234A (en) | Method and system for preparing natural gas from coke oven gas and generator gas and utilizing waste heat | |
| CN203683085U (en) | Device for preparing synthetic gas by performing methane reforming through blast furnace slag sensible heat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130102 |