CN102586527A - Novel hydrogen-carbon smelting reduction ironmaking process - Google Patents
Novel hydrogen-carbon smelting reduction ironmaking process Download PDFInfo
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- CN102586527A CN102586527A CN2012100480298A CN201210048029A CN102586527A CN 102586527 A CN102586527 A CN 102586527A CN 2012100480298 A CN2012100480298 A CN 2012100480298A CN 201210048029 A CN201210048029 A CN 201210048029A CN 102586527 A CN102586527 A CN 102586527A
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Abstract
The invention relates to a novel hydrogen-carbon smelting reduction ironmaking process which comprises the steps of preheating and prereduction of iron ore powder, smelting, slag and iron separation, hydrogen preheating and coal gas reforming. The novel hydrogen-carbon smelting reduction ironmaking process is characterized in that after the iron ore powder is preheated and prereduced, hydrogen and coal are used as reducing agents in the final reduction process and iron ores are subjected to final reduction in a smelting reduction mode; the slag and iron separation of molten liquid iron and molten slags is implemented in a siphon mode; high temperature gas exhausted from a final reduction furnace is subjected to reforming, gas making by coal gas, dust removal and temperature reduction and is subjected to pressure swing adsorption system processing after exchanging heat with the hydrogen; and heat required by the complete process is provided by the oxygen-coal combustion and the secondary combustion of reduction gas. Compared with the existing process, the process has the advantage that the CO2 discharge is reduced by about 10 percent.
Description
Technical field
The present invention relates to a kind of hydrogen carbon fused reduction iron-smelting novel process, belong to the non-blast furnace ironmaking technical field.
Background technology
Traditional blast furnace iron-making process is direct reductive agent with coke, and thermal losses is big; It is very high that coking in the blast furnace ironmaking flow process and sintering process exhaust gas discharged account for the gross contamination ratio to the pollution of environment.Therefore, to problems such as raw material, exhaust emission and energy consumptions ironmaking technique of fusion and reduction has been proposed.And traditional smelting reduction process (COREX, HISMELT etc.) is done reductive agent and heat-generating agent with carbon again simultaneously, has so just reduced energy utilization ratio, makes energy consumption higher.Smelting reduction process need use more efficient, more energy-conservation reductive agent.Hydrogen has been widely used in each field as a kind of clean energy, and uses hydrogen on thermodynamics of reactions under the melting and reducing condition and kinetics, all to have suitable advantage as reductive agent.New hydrogen carbon smelting reduction process can be realized producing the fine molten iron at the conventional carbon melting and reducing and realize less energy-consumption, low-carbon emission simultaneously.
Hydrogen carbon smelting reduction process, the heat that is produced by the secondary combustion reaction is whole fusion process heat supply, hydrogen is blown in the fusion reducing furnace with certain speed through bottom blowing element from the bottom, molten bath, for fusion process provides reductive agent and part of fuel.
Summary of the invention
The present invention is intended to develop a kind of novel process of fused reduction iron-smelting; Thereby realize the high utilization rate of Hydrogen Energy; Can reduce simultaneously iron manufacturing process to using the restriction of raw material (metallurgical coke, agglomerate etc.) condition; Reduce environmental pollution, and through the coal gas gasification system, pressure swing adsorption system removes the CO that dereaction generates
2Hydrogen in the coal gas is realized recycle, and the by product of reaction can be done other purposes.
This technology is the flow through bottom blowing element control hydrogen, and then control retailoring process.Oxygen coal spray gun through horizontal positioned carries out the secondary combustion reaction in slag blanket, for the retailoring process provides energy.To metal pool a certain amount of beans of jetting, the part beans is accomplished to molten iron carburizing (making the temperature of melting not need too high), and remaining carbon then can be used as reductive agent.Retailoring consumption carbon and the ratio that consumes hydrogen are controlled by the bottom blowing hydrogen and the amount of side-blown oxygen.
A kind of hydrogen carbon of the present invention fused reduction iron-smelting novel process is characterized in that having following process and step:
A. the preheating of raw material, the prereduction of powdered iron ore; The preheating of raw material and prereduction (a) are that powdered iron ore is preheated to 350 ℃, carry out prereduction again, and reduction temperature is 800 ℃, becomes the prereduction breeze; Can adjust the prereduction degree of powdered iron ore according to arts demand; When prereduction degree 47.5%, the reduction post-combustion rate is 41% eventually; The whole reduction process (b) that 800 ℃ pre-reduced iron breezes are delivered to next step through pipeline by nitrogen further melts and reduces;
B. whole retailoring; Be arranged in the coal oxygen burning spray gun of slag blanket, the primary combustion of coal and oxygen and reduce remaining hydrogen, carbon monoxide and in slag blanket, carry out secondary combustion reaction is the smelting reduction process heat supply; The coal of certain particle size, composition is that carrier passes through the beans rifle and adds metal pool with nitrogen, supplies raw materials for molten iron carburizing and reduction process, and the final retailoring of powdered iron ore becomes high-quality liquid iron, obtains 1600 ℃ coal gas of high temperature simultaneously.
A kind of hydrogen carbon of the present invention fused reduction iron-smelting novel process is characterized in that described preheating, prereduction and whole retailoring, has following fuel reaction and coal gas system:
(1). coal gas transformation of the way gas making process (c), it is characterized in that adding quantitative coal dust, with 1600 ℃ coal gas of high temperature, through coal gas gas making process, (discharged producer gas comprises unreacted H to make end reducing furnace coal gas
2, the H that secondary combustion generates
2O, CO
2, the CO that reduction generates) and through coal gas transformation of the way device, through adding the method for coal, the H that the fixed carbon in the coal will part
2O, CO
2Be converted into H
2And CO, because reaction is thermo-negative reaction, when temperature of gas is reduced to 1100 ℃, behind the gravitational dust collection,, can alleviate the burden of end reducing furnace like this with in its feeding pre-reducing furnace powdered iron ore being carried out preheating and prereduction; Coal gas gas making process has increased the reduction potential (H of discharged producer gas
2Increase with CO), improved the prereduction degree; Coal gas gas making process (c) also comprises the coal gas heat transfer process, and 25 ℃ of heat exchange of 1100 ℃ the coal gas and the hydrogen of bottom blowing are heated to 700 ℃ with hydrogen temperature, and gas temperature is reduced to 850 ℃ simultaneously, can become the transformation of the way coal gas that provides for the prereduction process;
(2). (discharged producer gas comprises unreacted H to water-gas shift process (d) with pre-reducing furnace coal gas
2, the H that secondary combustion generates
2O, CO
2, and the CO of C reduction generation) add water cooling, through the water-gas balanced reaction, remaining CO in the coal gas partly is converted into H
2And CO
2Thereby, the cyclic regeneration of realization hydrogen.Add quantitative water, with about 350 ℃ coal gas, carry out water gas shift reaction, coal gas is cooled to below 250 ℃, the CO fractional conversion in the coal gas is H simultaneously
2, the CO ratio that is transformed is about 70%.
(3). pressure-swing adsorption process (e), through the mode of transformation absorption, with the CO in the coal gas
2Separate, separate the hydrogen that obtains and carry out recycle.
The used whole reducing apparatus of a kind of hydrogen carbon of the present invention fused reduction iron-smelting novel process includes: former, fuel top rifle, cooling stave and box hat, gas exit, slag line; Oxygen coal spray gun, the beans spray gun, equalizer valve, slag is preposition; The molten iron precell, hydrogen bottom blowing element, fusion slag blanket, and metal pool; Internal structure is internal diameter footpath 3.4m, molten iron height h molten iron 0.8m, slag-metal rate 2.8, slag blanket height 2.2m, furnace bottom thickness 0.2m; The stove total height is 9.7m; Slagging tap taps a blast furnace takes hydrocone type to tap a blast furnace to slag tap; Body of heater is provided with the refractory brick furnace lining, and the top freeboard is adopted then and formed furnace lining with hanging the slag mode; Prereduction ore deposit and flux spray into from the stove top spray gun, and the upper strata spray gun is oxygen-coal spray gun, and lower floor's spray gun is the beans spray gun; Last row side rifle be the parameter of oxygen coal gun be depth of penetration be 500mm, with 15 ° of horizontal direction angles, the position is positioned at 1/3 place, slag blanket top, the oxygen coal spray gun that 4 symmetric arrangement are set around the body of heater is jetted; Wherein the oxygen total flux is 13175Nm3/h, and the pulverized coal injection total amount is 13850kg/h, chooses fine coal pipeline φ 60mm * 5; Secondary oxygen pipeline φ 118mm * 6; Oxygen pipeline φ 90mm * 6, secondary oxygen pipeline throat diameter 37mm, secondary oxygen pipe outlet diameter 48mm; In the reduction zone of fusion reducing furnace, following row side rifle be the depth of penetration of beans rifle be 1300mm, with 45 ° of the angles of horizontal direction, adopt 2 beans spray guns to jet; Beans winding-up total amount is 3125kg/h, chooses beans pipeline φ 50mm * 5, nitrogen pipeline φ 70mm * 5; Hydrogen is adopted in bottom blowing, and the hydrogen bottom blowing element is blown into from the bottom, and 700 ℃ hydrogen is blown into the molten bath from the bottom through stephanoporate air brick; Waste coal gas is the gas exit discharge from stove top.
The mechanism of relevant this technology:
(1) beans is carburizing agent and reductive agent can be provided, and molten iron is carried out carburizing, promptly forms FeC
3, the graphite carbon come-up of separating out in the iron liquid is participated in the partial reduction reaction.
(2) H
2With graphite carbon good kinetics reductive condition is provided, quickens reduction process, increase combustion intensity.
(3) the rifle material that sprays in top can be brought the heat on slag blanket top into the molten bath bottom.The rational temperature gradient can improve the heat transfer efficiency of slag blanket to the molten bath.
(4) water-gas reaction under the high temperature can reduce slag blanket and gas temperature.
Characteristics of the present invention and advantage:
1, can use fine ore, fine coal to need not to use agglomerate and metallurgical coke, reduce the pollution of environment as raw material.
2,, promptly effectively be reduced into and be divided into H owing to use hydrogen to be raw material
2, reduced CO
2Produce, the use that has reduced coal reduces environmental pollution.
3, from the reductive effect, because main reductive agent is the H that methane cracking produces
2With analyse
The graphite carbon that goes out so can greatly improve reductive speed, increases combustion intensity.
Description of drawings
Fig. 1 is hydrogen ironmaking new technological flow synoptic diagram of the present invention.
Wherein: a prereduction and preheating, b reduction eventually, the transformation of the way of c coal gas, d water-gas shift, the absorption of e transformation
Fig. 2 is a melting and reducing end reducing furnace equipment synoptic diagram of the present invention.
Wherein: 1 former, fuel top rifle, 2 cooling staves and box hat, the outlet of 3 waste coal gas, 4 slag lines, 5 oxygen coal spray guns, 6 beans spray guns, 7 equalizer valves, 8 slags are preposition, 9 molten iron precells, 10 hydrogen bottom blowing element, 11 fusion slag blankets, 12 metal pools.
Embodiment
A kind of hydrogen carbon of the present invention fused reduction iron-smelting novel process has following process and step:
A. the preheating of raw material, the prereduction of powdered iron ore; The preheating of raw material and prereduction (a) are that powdered iron ore is preheated to 350 ℃, carry out prereduction again, and reduction temperature is 800 ℃, becomes the prereduction breeze; Can adjust the prereduction degree of powdered iron ore according to arts demand; When prereduction degree 47.5%, the reduction post-combustion rate is 41% eventually; The whole reduction process (b) that 800 ℃ pre-reduced iron breezes are delivered to next step through pipeline by nitrogen further melts and reduces;
B. whole retailoring; Be arranged in the coal oxygen burning spray gun of slag blanket, the primary combustion of coal and oxygen and reduce remaining hydrogen, carbon monoxide and in slag blanket, carry out secondary combustion reaction is the smelting reduction process heat supply; The coal of certain particle size, composition is that carrier passes through the beans rifle and adds metal pool with nitrogen, supplies raw materials for molten iron carburizing and reduction process, and the final retailoring of powdered iron ore becomes high-quality liquid iron, obtains 1600 ℃ coal gas of high temperature simultaneously.
A kind of hydrogen carbon of the present invention fused reduction iron-smelting novel process, described preheating, prereduction and whole retailoring have following fuel reaction and coal gas system:
(1). coal gas transformation of the way gas making process (c), it is characterized in that adding quantitative coal dust, with 1600 ℃ coal gas of high temperature, through coal gas gas making process, (discharged producer gas comprises unreacted H to make end reducing furnace coal gas
2, the H that secondary combustion generates
2O, CO
2, the CO that reduction generates) and through coal gas transformation of the way device, through adding the method for coal, the H that the fixed carbon in the coal will part
2O, CO
2Be converted into H
2And CO, because reaction is thermo-negative reaction, when temperature of gas is reduced to 1100 ℃, behind the gravitational dust collection,, can alleviate the burden of end reducing furnace like this with in its feeding pre-reducing furnace powdered iron ore being carried out preheating and prereduction; Coal gas gas making process has increased the reduction potential (H of discharged producer gas
2Increase with CO), improved the prereduction degree; Coal gas gas making process (c) also comprises the coal gas heat transfer process, and 25 ℃ of heat exchange of 1100 ℃ the coal gas and the hydrogen of bottom blowing are heated to 700 ℃ with hydrogen temperature, and gas temperature is reduced to 850 ℃ simultaneously, can become the transformation of the way coal gas that provides for the prereduction process;
(2). (discharged producer gas comprises unreacted H to water-gas shift process (d) with pre-reducing furnace coal gas
2, the H that secondary combustion generates
2O, CO
2, and the CO of C reduction generation) add water cooling, through the water-gas balanced reaction, remaining CO in the coal gas partly is converted into H
2And CO
2Thereby, the cyclic regeneration of realization hydrogen.Add quantitative water, with about 350 ℃ coal gas, carry out water gas shift reaction, coal gas is cooled to below 250 ℃, the CO fractional conversion in the coal gas is H simultaneously
2, the CO ratio that is transformed is about 70%.
(3). pressure-swing adsorption process (e), through the mode of transformation absorption, with the CO in the coal gas
2Separate, separate the hydrogen that obtains and carry out recycle.
The used whole reducing apparatus of a kind of hydrogen carbon of the present invention fused reduction iron-smelting novel process includes: former, fuel top rifle 1, cooling stave and box hat 2, gas exit 3; Slag line 4, oxygen coal spray gun 5, beans spray gun 6; Equalizer valve 7, slag is preposition 8, molten iron precell 9; Hydrogen bottom blowing element 10, fusion slag blanket 11 and metal pool 12; Internal structure is internal diameter footpath 3.4m, molten iron height h molten iron 0.8m, slag-metal rate 2.8, slag blanket height 2.2m, furnace bottom thickness 0.2m; The stove total height is 9.7m; Slagging tap taps a blast furnace takes hydrocone type to tap a blast furnace to slag tap; Body of heater is provided with the refractory brick furnace lining, and the top freeboard is adopted then and formed furnace lining with hanging the slag mode; Prereduction ore deposit and flux spray into from stove top spray gun 1, and the upper strata spray gun is oxygen-coal spray gun 5, and lower floor's spray gun is a beans spray gun 6; Last row side rifle be the parameter of oxygen coal gun 5 be depth of penetration be 500mm, with 15 ° of horizontal direction angles, the position is positioned at 1/3 place, slag blanket top, the oxygen coal spray gun that 4 symmetric arrangement are set around the body of heater is jetted; Wherein the oxygen total flux is 13175Nm3/h, and the pulverized coal injection total amount is 13850kg/h, chooses fine coal pipeline φ 60mm * 5; Secondary oxygen pipeline φ 118mm * 6; Oxygen pipeline φ 90mm * 6, secondary oxygen pipeline throat diameter 37mm, secondary oxygen pipe outlet diameter 48mm; In the reduction zone of fusion reducing furnace, following row side rifle be the depth of penetration of beans rifle 6 be 1300mm, with 45 ° of the angles of horizontal direction, adopt 2 beans spray guns to jet; Beans winding-up total amount is 3125kg/h, chooses beans pipeline φ 50mm * 5, nitrogen pipeline φ 70mm * 5; Hydrogen is adopted in bottom blowing, and hydrogen bottom blowing element 10 is blown into from the bottom, and 700 ℃ hydrogen is blown into the molten bath from the bottom through stephanoporate air brick; Waste coal gas is gas exit 3 discharges from stove top.
Former, fuel top rifle 1 as shown in Figure 2, raw material comprise materials such as powdered iron ore and solvent with nitrogen be carrier rifle adds with certain speed from the top, can play the purpose that reduces the slag blanket thermograde, heat transfer efficiency is improved; Slag line 4, molten slag surface and anti-material position contacting; Coal oxygen burning spray gun 5 is arranged in the coal oxygen burning spray gun of slag blanket 11, and the primary combustion of coal and oxygen and reduce remaining hydrogen, carbon monoxide and in slag blanket, carry out the secondary combustion reaction is the smelting reduction process heat supply; Beans rifle 6, the coal of certain particle size, composition is that carrier adds in the metal pool 12 with nitrogen, for molten iron carburizing and reduction process are supplied raw materials; Purge nitrogen to carrying out supercharging in the stove through equalizer valve 7 in the stove; Molten iron precell 9 adopts siphon mode to tap a blast furnace; Bottom blowing element 10, hydrogen gets in the molten bath through this device, has formed the mushroom head at gas outlet end refrigerative iron liquid and can protect bottom blowing element.
Utilize the production example of novel process of the present invention
500 tons of molten iron of day output, day is tapped a blast furnace 20 ~ 25 tons of molten iron 12 times.Use powdered iron ore, crude fuels such as flux and coal dust.Material temperature is about 800 ℃ after prereduction, preheating, gets into smelting reduction in the slag blanket, 1500 ℃ ~ 1600 ℃ of slag blanket temperature.Slag iron separates, 1450 ℃ of molten iron temperatures, and combustion intensity is every cubic metre of every day of 8 ~ 10 tons of iron.The employing hydrocone type is tapped a blast furnace, furnace pressure 0.2Mpa.Whole reducing apparatus internal structure is internal diameter footpath 3.4m, molten iron height h molten iron 0.8m, slag-metal rate 2.8, slag blanket height 2.2m, furnace bottom thickness 0.2m.The stove total height is 9.7m.The prereduction degree is 47.5%, and post-combustion rate is 41% 503 cubic metres of ton iron oxygen consumptions constantly, 530 cubic metres of hydrogen consumptions (being used to reduce 340 cubic metres), 630 kilograms of coal consumptions, CO
21.67 tons of iron per ton of quantity discharged, it is lower that molten iron contains P.
Claims (3)
1. hydrogen carbon fused reduction iron-smelting novel process is characterized in that having following process and step:
A. the preheating of raw material, the prereduction of powdered iron ore; The preheating of raw material and prereduction (a) are that powdered iron ore is preheated to 350 ℃, carry out prereduction again, and reduction temperature is 800 ℃, becomes the prereduction breeze; Can adjust the prereduction degree of powdered iron ore according to arts demand; When prereduction degree 47.5%, the reduction post-combustion rate is 41% eventually; The whole reduction process (b) that 800 ℃ pre-reduced iron breezes are delivered to next step through pipeline by nitrogen further melts and reduces;
B. whole retailoring; Be arranged in the coal oxygen burning spray gun of slag blanket, the primary combustion of coal and oxygen and reduce remaining hydrogen, carbon monoxide and in slag blanket, carry out secondary combustion reaction is the smelting reduction process heat supply; The coal of certain particle size, composition is that carrier passes through the beans rifle and adds metal pool with nitrogen, supplies raw materials for molten iron carburizing and reduction process, and the final retailoring of powdered iron ore becomes high-quality liquid iron, obtains 1600 ℃ coal gas of high temperature simultaneously.
2. the hydrogen carbon fused reduction iron-smelting novel process of narrating like claim 1 is characterized in that described preheating, prereduction and whole retailoring, has following fuel reaction and coal gas system:
(1). coal gas transformation of the way gas making process (c), it is characterized in that adding quantitative coal dust, with 1600 ℃ coal gas of high temperature, through coal gas gas making process, (discharged producer gas comprises unreacted H to make end reducing furnace coal gas
2, the H that secondary combustion generates
2O, CO
2, the CO that reduction generates) and through coal gas transformation of the way device, through adding the method for coal, the H that the fixed carbon in the coal will part
2O, CO
2Be converted into H
2And CO, because reaction is thermo-negative reaction, when temperature of gas is reduced to 1100 ℃, behind the gravitational dust collection,, can alleviate the burden of end reducing furnace like this with in its feeding pre-reducing furnace powdered iron ore being carried out preheating and prereduction; Coal gas gas making process has increased the reduction potential (H of discharged producer gas
2Increase with CO), improved the prereduction degree; Coal gas gas making process (c) also comprises the coal gas heat transfer process, and 25 ℃ of heat exchange of 1100 ℃ the coal gas and the hydrogen of bottom blowing are heated to 700 ℃ with hydrogen temperature, and gas temperature is reduced to 850 ℃ simultaneously, can become the transformation of the way coal gas that provides for the prereduction process;
(2). (discharged producer gas comprises unreacted H to water-gas shift process (d) with pre-reducing furnace coal gas
2, the H that secondary combustion generates
2O, CO
2, and the CO of C reduction generation) add water cooling, through the water-gas balanced reaction, remaining CO in the coal gas partly is converted into H
2And CO
2Thereby, the cyclic regeneration of realization hydrogen;
Add quantitative water, with about 350 ℃ coal gas, carry out water gas shift reaction, coal gas is cooled to below 250 ℃, the CO fractional conversion in the coal gas is H simultaneously
2, the CO ratio that is transformed is about 70%;
(3). pressure-swing adsorption process (e), through the mode of transformation absorption, with the CO in the coal gas
2Separate, separate the hydrogen that obtains and carry out recycle.
3. the used whole reducing apparatus of hydrogen carbon fused reduction iron-smelting novel process includes: former, fuel top rifle (1), cooling stave and box hat (2), gas exit (3); Slag line (4), oxygen coal spray gun (5), beans spray gun (6); Equalizer valve (7), slag preposition (8), molten iron precell (9); Hydrogen bottom blowing element (10), fusion slag blanket (11), and metal pool (12); Internal structure is internal diameter footpath 3.4m, molten iron height h molten iron 0.8m, slag-metal rate 2.8, slag blanket height 2.2m, furnace bottom thickness 0.2m; The stove total height is 9.7m; Slagging tap taps a blast furnace takes hydrocone type to tap a blast furnace to slag tap; Body of heater is provided with the refractory brick furnace lining, and the top freeboard is adopted then and formed furnace lining with hanging the slag mode; Prereduction ore deposit and flux spray into from stove top spray gun (1), and the upper strata spray gun is oxygen-coal spray gun (5), and lower floor's spray gun is beans spray gun (6); Last row side rifle be the parameter of oxygen coal gun (5) be depth of penetration be 500mm, with 15 ° of horizontal direction angles, the position is positioned at 1/3 place, slag blanket top, the oxygen coal spray gun that 4 symmetric arrangement are set around the body of heater is jetted; Wherein the oxygen total flux is 13175Nm3/h, and the pulverized coal injection total amount is 13850kg/h, chooses fine coal pipeline φ 60mm * 5; Secondary oxygen pipeline φ 118mm * 6; Oxygen pipeline φ 90mm * 6, secondary oxygen pipeline throat diameter 37mm, secondary oxygen pipe outlet diameter 48mm; In the reduction zone of fusion reducing furnace, following row side rifle be the depth of penetration of beans rifle (6) be 1300mm, with 45 ° of the angles of horizontal direction, adopt 2 beans spray guns to jet; Beans winding-up total amount is 3125kg/h, chooses beans pipeline φ 50mm * 5, nitrogen pipeline φ 70mm * 5; Hydrogen is adopted in bottom blowing, and hydrogen bottom blowing element (10) is blown into from the bottom, and 700 ℃ hydrogen is blown into the molten bath from the bottom through stephanoporate air brick; Waste coal gas is gas exit (3) discharge from stove top.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104870657A (en) * | 2012-12-27 | 2015-08-26 | 株式会社Posco | Molten iron manufacturing apparatus and molten iron manufacturing method |
| CN106566907A (en) * | 2016-11-08 | 2017-04-19 | 上海大学 | Production method for directly smelting iron by iron ores and smelting reduction device |
| CN111139330A (en) * | 2020-01-23 | 2020-05-12 | 北京首钢国际工程技术有限公司 | Iron-containing material preheating and pre-reducing device |
| CN111235338A (en) * | 2020-02-26 | 2020-06-05 | 内蒙古赛思普科技有限公司 | Method for producing ultra-low trace element molten iron by using smelting reduction furnace |
| CN115354105A (en) * | 2022-08-17 | 2022-11-18 | 山东大学 | System and method for reducing exhaust gas circulating gas-based direct reduced iron |
| CN115652007A (en) * | 2022-09-29 | 2023-01-31 | 攀钢集团西昌钢钒有限公司 | Novel smelting reduction iron-making method and device |
| WO2023130750A1 (en) * | 2022-01-06 | 2023-07-13 | 中冶长天国际工程有限责任公司 | Method and system for directly reducing iron oxide, and use of system |
-
2012
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104870657A (en) * | 2012-12-27 | 2015-08-26 | 株式会社Posco | Molten iron manufacturing apparatus and molten iron manufacturing method |
| US10422582B2 (en) | 2012-12-27 | 2019-09-24 | Posco | Molten iron manufacturing apparatus and molten iron manufacturing method |
| CN106566907A (en) * | 2016-11-08 | 2017-04-19 | 上海大学 | Production method for directly smelting iron by iron ores and smelting reduction device |
| CN111139330A (en) * | 2020-01-23 | 2020-05-12 | 北京首钢国际工程技术有限公司 | Iron-containing material preheating and pre-reducing device |
| CN111235338A (en) * | 2020-02-26 | 2020-06-05 | 内蒙古赛思普科技有限公司 | Method for producing ultra-low trace element molten iron by using smelting reduction furnace |
| WO2023130750A1 (en) * | 2022-01-06 | 2023-07-13 | 中冶长天国际工程有限责任公司 | Method and system for directly reducing iron oxide, and use of system |
| CN115354105A (en) * | 2022-08-17 | 2022-11-18 | 山东大学 | System and method for reducing exhaust gas circulating gas-based direct reduced iron |
| CN115354105B (en) * | 2022-08-17 | 2024-04-19 | 山东大学 | System and method for reducing gas-based direct reduced iron of exhaust gas circulation |
| CN115652007A (en) * | 2022-09-29 | 2023-01-31 | 攀钢集团西昌钢钒有限公司 | Novel smelting reduction iron-making method and device |
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Application publication date: 20120718 |