CN107513596A - A kind of double shaft furnace system and method for Joint Production - Google Patents

A kind of double shaft furnace system and method for Joint Production Download PDF

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Publication number
CN107513596A
CN107513596A CN201710806210.3A CN201710806210A CN107513596A CN 107513596 A CN107513596 A CN 107513596A CN 201710806210 A CN201710806210 A CN 201710806210A CN 107513596 A CN107513596 A CN 107513596A
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China
Prior art keywords
gas
shaft furnace
furnace
remover
air inlet
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Chinese (zh)
Inventor
吴道洪
刘亮
邓君
范志辉
员晓
唐敬坤
冯鲁兴
韩志彪
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Jiangsu Province Metallurgical Design Institute Co Ltd
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Jiangsu Province Metallurgical Design Institute Co Ltd
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Priority to CN201710806210.3A priority Critical patent/CN107513596A/en
Publication of CN107513596A publication Critical patent/CN107513596A/en
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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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/146—Multi-step reduction without melting
    • 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
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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

Abstract

The invention discloses a kind of double shaft furnace systems for Joint Production, the system includes the first blending tank, the first compressor, heating furnace, the first shaft furnace, dust pelletizing system, transformation system, the first CO2Remover, the second blending tank, modification heating furnace, the second shaft furnace, water scrubber, the 2nd CO2Remover, the second compressor and the connecting line between them.Invention also provides the method using this system combined production iron-containing product.Difference of the system and method based on sefstromite thing Yu iron ore concentrate thing resources characteristic, combined using two kinds of different operating mode shaft furnaces, realize the direct-reduction of different minerals.The difference of two shaft furnace reaction condition pressure is make use of, the gradient for effectively realizing pressure uses, and improves energy utilization rate, reduces equipment investment cost to a certain extent, reduce equipment complexity.Take full advantage of the effective gas H of two reducing gas for shaft furnace2/ CO realizes the efficient utilization to the energy, resource than different difference.

Description

A kind of double shaft furnace system and method for Joint Production
Technical field
The present invention relates to metallurgical technology field, and specifically, the present invention relates to double shaft furnace Joint Production systems and producer Method.
Background technology
Gas-based shaft kiln reducing iron ore is with CO and H2As also Primordial Qi raw material and energy supply mode, less than solid mineral Reduction occurs under the conditions of raw material softening temperature to obtain solid product.Three parts are generally divided into inside shaft furnace from top to bottom, Preheating section, reduction section, cooling section.The shaft kiln directly reduced of iron ore concentrate obtains large-scale industrialization application already, and in recent years Also have using vanadium titano-magnetite or vanadium titanium sea sand ore deposit and realize grinding for more metal synthetical recoveries using shaft kiln directly reduced as raw material Study carefully report.
Existing research uses shaft kiln directly reduced vanadium titano-magnetite or vanadium titanium sea sand ore deposit, compared to perpendicular on reaction condition Stove direct-reduction iron ore concentrate is harsh, in order to promote the good progress of reaction, during the course of the reaction to temperature, also pressure, Primordial Qi Composition has higher requirement.Certain energy utilization rate problem can be so caused, and of a relatively high furnace roof atmospheric pressure exists Higher is required to the corollary equipment of top gas system during reuse.Moreover, v-ti magnetite ore resources is shaft kiln directly reduced right Also Primordial Qi composition there are certain requirements, and the hydrogen content that it is required is higher than iron ore concentrate shaft furnace process, so adds and goes back Primordial Qi Prepare and require, and reduce the comprehensive utilization ratio of also Primordial Qi.
The content of the invention
Present invention seek to address that the problem of in above-mentioned correlation technique.Therefore, the present invention proposes a kind of sefstromite thing gas base Shaft furnace and the system and combine production method of iron ore concentrate gas-based shaft kiln Joint Production.The system and method be based on sefstromite thing with The difference of iron ore concentrate thing resources characteristic, combined using two kinds of different operating mode shaft furnaces, realize the direct-reduction of different minerals.
The characteristics of in combination with two shaft furnace differential responses raw materials and reaction condition, system is coupled, it is real to also Primordial Qi Existing more efficient utilization, effectively reduces CO2 emission, realizes the efficient utilization to different iron ore reduction gas raw materials, reduce Equipment investment, fully optimized reaction system reach the comprehensive utilization of resource, the energy, finally realize the comprehensive life of more metal products Production.
The present invention uses following technical scheme：
A kind of double shaft furnace systems for Joint Production, the system include the first blending tank, the first compressor, heating furnace, First shaft furnace, dust pelletizing system, transformation system, the first CO2Remover, the second blending tank, modification heating furnace, the second shaft furnace, washing Tower, the 2nd CO2Remover, the second compressor and the connecting line between them, wherein：
First blending tank includes the first air inlet, the second air inlet and gas outlet, the first air inlet and fresh also Primordial Qi Feeder connects, and gas outlet connects with the air inlet of the first compressor；
The gas outlet of first compressor connects with the air inlet of heating furnace；
The gas outlet of heating furnace connects with the air inlet of the first shaft furnace；
The gas outlet of first shaft furnace connects with the air inlet of dust pelletizing system；
The gas outlet of dust pelletizing system connects with transformation system air inlet；
Transformation system also includes another air inlet, and another air inlet connects with vapor feeding mechanism, and transformation system goes out Gas port and the first CO2The air inlet connection of remover；
First CO2Remover includes at least two-way outlet pipe, wherein the second of outlet pipe and the first blending tank all the way Air inlet connects, and another way outlet pipe connects with the air inlet of the second blending tank；
The gas outlet of second blending tank connects with modifying the air inlet of heating furnace；
Modification heating furnace is provided with carbon raw material adding mouth, modifies the gas outlet of heating furnace and connects with the air inlet of the second shaft furnace It is logical；
The gas outlet of second shaft furnace connects with the air inlet of water scrubber；
The gas outlet of water scrubber and the 2nd CO2The air inlet connection of remover；
2nd CO2Remover includes at least two-way outlet pipe, wherein the air inlet of outlet pipe and the second compressor all the way Mouth connection, another way outlet pipe connect with modification heating furnace；
The gas outlet of second compressor connects with the second blending tank.
In one embodiment of the invention, dust pelletizing system is dry dust pelletizing system.
In one embodiment of the invention, it is Cyclone bag dust collector and/or electric cleaner to do dust pelletizing system.
In one embodiment of the invention, the first CO2Remover and/or the 2nd CO2Remover be chemical method remover, Pressure swing adsorption method remover or vacuum pressure swing adsorption process remover.
In one embodiment of the invention, in the first CO2The outlet that remover connects with the air inlet of the second blending tank In the case that the pressure of the gas of pipeline discharge is higher than the second reducing gas for shaft furnace pressure requirements, the second blending tank is decompression tank.
In one embodiment of the invention, fresh also Primordial Qi mainly includes H2And CO.
The present invention additionally provides the method using the system combined production iron-containing product simultaneously, and this method mainly includes following Step：
1) fresh also Primordial Qi is passed through into the first blending tank, makes fresh also Primordial Qi and the gas mixing in the first blending tank；
2) using the first compressor by the gas boosting that the first blending tank discharge to the first preset pressure, heating furnace general is used Gas after supercharging is heated to the first preset temperature, and gas is passed through into the first shaft furnace afterwards；
3) the first iron-bearing mineral is put into the first shaft furnace, the gas in the first shaft furnace contacts instead with the first iron-bearing mineral Should, obtain the first top gas and the first iron content product；
4) dedusting is carried out to the first top gas using dust pelletizing system, the gas by dedusting is reacted gas in transformation system Carbon monoxide in body is transformed to H with vapor2And CO2；
5) the first CO is utilized2Remover is rich in H by what step 4) obtained2And CO2Gas in CO2Removing, is rich in H2Gas；
6) it is rich in H by what is obtained in step 5)2The part of gas be transmitted back to the first blending tank, be rich in H by remaining2 Gas be transported to the second blending tank so that it is with the gas mixing in the second blending tank and is passed through modification heating furnace；
7) to modification heating furnace in add carbon raw material so that its with from the second shaft furnace and through water scrubber to the second furnace roof Gas carries out washing cooling and dedusting and the 2nd CO2CO in second top gas of remover separation2React generation CO, simultaneously The gas in stove is heated to the second preset temperature using heating furnace is modified；
8) gas that will warm up the second preset temperature is transported to the second shaft furnace, and the second iron content is put into the second shaft furnace Mineral, gas and the second iron-bearing mineral haptoreaction in the second shaft furnace, obtain the second top gas and the second iron content product；
9) the second top gas is carried out using water scrubber washing cooling and dedusting, utilizes the 2nd CO afterwards2Remover is by gas CO in body2Separation, by the CO of separation2Modification heating furnace is transported to, while CO will be separated2Residual gas afterwards is transported to Two compressors；
10) residual gas in step 9) is made to be pressurized to the second preset pressure using the second compressor, and by after increase Gas is transported to the second blending tank to realize recycling for gas.
In one embodiment of the invention, step 6), which is additionally included in the second blending tank, makes to be rich in H2Gas pressure It is down to the second preset pressure.
In one embodiment of the invention, the first preset pressure is more than the second preset pressure.
In one embodiment of the invention, wherein, the first shaft furnace is the gas-based shaft kiln of processing sefstromite thing, and first is perpendicular Stove enters H in stove also Primordial Qi2It is 3~5, H with CO volume ratios2The first shaft furnace, which is accounted for, with CO cumulative volume enters stove reducing gas product than big In equal to 0.85, reaction temperature is 950~1100 DEG C, and furnace pressure is maintained between 0.4MPa and 0.8MPa；Second shaft furnace is The gas-based shaft kiln of iron ore concentrate is handled, the second shaft furnace enters H in stove also Primordial Qi2It is 1~3, H with CO volume ratios2Accounted for CO cumulative volume Second shaft furnace enters stove reducing gas product than being more than or equal to 0.85, and reaction temperature is 800~900 DEG C, and furnace pressure is maintained at Between 0.1MPa and 0.3MPa.
By the use of the above-mentioned double shaft furnace production system and methods of the present invention, following multiple beneficial effect can be obtained：
(1) difference of two shaft furnace reaction condition pressure is taken full advantage of, the gradient for effectively realizing pressure uses, and improves Energy utilization rate, equipment investment cost is reduced to a certain extent, reduces equipment complexity；
(2) system of the invention has used modification heating furnace, is on the one hand entered by the use of the carbon dioxide after separation as raw material Row modification, generates the utilization rate that CO gas improves gas, effectively reduces the discharge of system carbon dioxide after modification, On the other hand modification heating furnace can be that the second also Primordial Qi is heated, and optimize system equipment, the addition for modifying heating furnace can To effectively improve the second CO contents gone back in Primordial Qi, the second also Primordial Qi H can be ensured in hydrogen content2On the premise of/CO ratios, carry High second reduction shaft furnace tolerance, makes the reduction tolerance of the second shaft furnace no longer be limited by the first shaft furnace top gas component content, So as to preferably carry out output optimization according to the production requirement of reality, system is effectively increased under the conditions of equivalent devices Production capacity；
(3) method of Joint Production iron-containing product of the invention takes full advantage of the effective gas H of two reducing gas for shaft furnace2/ CO ratios Different difference, caused top gas is handled by dry dedusting after reacting the first shaft furnace, remains stove while dedusting Moisture in top gas, wherein vapor is set to be used in the transformation system of subsequent treatment as raw material；
(4) convert and hydrogen rich gas part is transmitted back to the first blending tank in the first top gas after carbon dioxide removal, it is another Part uses as the raw material of the second also Primordial Qi, effectively increases resource utilization, and equipment maturation is easily achieved, certain journey Equipment investment cost is reduced on degree, realizes the efficient utilization to the energy, resource.
Brief description of the drawings
Fig. 1 is the schematic diagram of double shaft furnace systems for Joint Production of the present invention；
Fig. 2 is the flow chart of the method for the Joint Production iron-containing product of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to specific embodiment and attached Figure, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining this hair It is bright, it is not intended to limit the present invention.
Fig. 1 shows double shaft furnace systems for Joint Production of the present invention, and the system includes the first blending tank 11, first Compressor 12, heating furnace 13, the first shaft furnace 10, dust pelletizing system 14, transformation system 17, the first CO2Remover 18, the second blending tank 15th, heating furnace 16, the second shaft furnace 20, water scrubber 21, the 2nd CO are modified2Remover 22, the second compressor 23 and they between Connecting line.
As shown in figure 1, the first blending tank 11 includes the first air inlet, the second air inlet and gas outlet, the first air inlet Connected with fresh also Primordial Qi feeder, gas outlet connects with the air inlet of the first compressor 12.The outlet of first compressor 12 Mouth connects with the air inlet of heating furnace 13.The gas outlet of heating furnace 13 connects with the air inlet of the first shaft furnace 10.First shaft furnace 10 Gas outlet connected with the air inlet of dust pelletizing system 14.The gas outlet of dust pelletizing system 14 connects with an air inlet of transformation system 17 Logical, transformation system 17 also includes another air inlet, and another air inlet connects with vapor feeding mechanism, the outlet of transformation system 17 Mouth and the first CO2The air inlet connection of remover 18.First CO2Remover 18 includes two-way outlet pipe, wherein escape pipe all the way Road connects with the second air inlet of the first blending tank 11, and another way outlet pipe connects with the air inlet of the second blending tank 15. First CO2In the case that the pressure of the gas of the gas outlet of remover 18 discharge is higher than the reduction atmospheric pressure requirement of the second shaft furnace 20, the Two blending tanks 15 are decompression tank.The gas outlet of second blending tank 15 connects with modifying the air inlet of heating furnace 16, modifies heating furnace 16 gas outlet connects with the air inlet of the second shaft furnace 20.The gas outlet of second shaft furnace 20 connects with the air inlet of water scrubber 21. The gas outlet of water scrubber 21 and the 2nd CO2The air inlet connection of remover 22.2nd CO2Remover 22 includes two-way outlet pipe, Wherein outlet pipe connects with the air inlet of the second compressor 23 all the way, and another way outlet pipe connects with modification heating furnace 16. The gas outlet of second compressor 23 connects with the second blending tank 15.
Wherein, the first shaft furnace 10 is used to be reduced directly the vanadium ferrotianium grandidierite goods and materials such as vanadium titano-magnetite or vanadium titanium sea sand ore deposit Source, to obtain the sponge iron of rich vanadium titanium and the first shaft furnace top gas.Second shaft furnace 20 is used to be reduced directly iron ore concentrate or other High iron mineral source, to obtain sponge iron and the second shaft furnace top gas.First shaft furnace 10 control higher temperature, pressure and The higher also Primordial Qi of hydrogen content, the second shaft furnace 20 are produced using ripe iron ore concentrate shaft furnace reaction condition, realize different ore deposits The direct-reduction of thing, the characteristics of in combination with two shaft furnace differential responses raw materials and reaction condition, system is coupled, realizes energy Source and the efficient utilization of resource.
The effect of first blending tank 11 is to be sufficiently mixed fresh also Primordial Qi to obtain with the hydrogen-rich gas after conversion decarburization The also Primordial Qi of the first of composition needed for first perpendicular reaction in furnace.First compressor 12 is used to the first also Primordial Qi being pressurized to suitable pressure Power and heating furnace 13 are used to the first also Primordial Qi being heated to suitable temperature, so that the reaction in the first shaft furnace uses.Heating furnace 13 can be the diversified forms such as tube furnace, radiating tube furnace or hot-blast stove.
Dust pelletizing system 14 is used for the first shaft furnace top gas dedusting.In a preferred embodiment of the invention, dedusting system Unite to do dust pelletizing system, dry dust pelletizing system can be according to actual conditions from Cyclone bag dust collector, electric cleaner or a variety of dry The combination of formula deduster.It can ensure that the thermal loss of the first top gas is smaller from dry collector, be protected in processing procedure The water vapor component in top gas is stayed, retained vapor participates in subsequent reactions, saves the energy and resource.
Transformation system 17 requires supplementation with vapor according to reaction condition, according to reaction CO+H2O (g)=H2+CO2By in system Carbon monoxide and vapor response transform be hydrogen and carbon dioxide, due to being given birth in the first shaft furnace top gas containing direct-reduction Into part vapor, this part vapor can be retained by dry dust pelletizing system 14, into conversion after directly utilized, phase Vapor addition is effectively reduced than common conversion process, has obtained hydrogen-rich gas while using vapor.
First CO2The main function of remover 18 is to remove the CO in mixed gas caused by transformation system 172, to improve Convert aerogenesis value.CO herein2Remover can be that chemical method remover can also be that pressure swing adsorption method or Vacuum Pressure Swing are inhaled Attached method remover.Separated CO2It can be used as first, second shaft furnace blanket gas or be passed through modification heating as raw material Stove 16 uses or otherwise utilized.
Second blending tank 15 is used to make to come from the first CO2The hydrogen-rich gas of remover 18 and the gas from the second compressor 23 Body mixes.In the first CO2The pressure of the gas of the gas outlet of remover 18 discharge is higher than the reduction atmospheric pressure requirement of the second shaft furnace 10 In the case of, the second blending tank 15 is decompression tank, such as decompression valve group or other regulators are connected with blending tank porch, is made Gas pressure meets requirement.Specifically, being depressured tank can be according to the first CO2Remover supplies and the second reduction shaft furnace air pressure The requirement adjustment Amplitude of Hypotensive of power, to meet the pressure requirements of the second shaft furnace 20.Because a level pressure be present to gas in pipeline, equipment Damage, in some cases, if the first CO2Remover supplies the pressure requirements that can reach the second reducing gas for shaft furnace, can also adopt Replace being depressured tank use with common mixed gas tank.
Modify also Primordial Qi usage amount of the heating furnace 16 according to the second shaft furnace 20 and H in also Primordial Qi2The requirement such as ratio between/CO, Add CO2The part or all of carbon dioxide of remover separation, in modification heating furnace 16 and by modifying heating furnace CO occurs for the carbon raw materials such as coal dust or carbon dust that carbon raw material adding mouth adds2+ C=2CO reacts, and improves CO ratios in gas. Moreover, modification heating furnace 16 will be heated to suitable temperature by the also Primordial Qi that modification heating furnace is passed through in the second blending tank, for the Two shaft furnaces 20 provide the second qualified also Primordial Qi of temperature, composition.The CO in system can be utilized well by modifying heating furnace simultaneously2Gas Body raw material, effectively reduce the outer row of carbon dioxide.On the other hand gaseous mixture can be heated, can save one it is special Furnace apparatus.The addition of modification heating furnace can effectively improve the second CO contents gone back in Primordial Qi, and hydrogen contains in also Primordial Qi Amount can ensure the second also Primordial Qi H2On the premise of/CO ratios, the second reduction shaft furnace tolerance is effectively improved, makes the reduction of the second shaft furnace Each component content of gas is no longer limited by the first shaft furnace top gas component content, so as to be carried out according to the production requirement of reality Output optimization, system capacity is improved under the conditions of equivalent devices.
Water scrubber 21 is used for the cooling of the second shaft furnace top gas, dedusting.2nd CO2Remover 22 is used for the after washing Two shaft furnace top gases carry out CO2Separation.CO herein2Remover can be chemical method remover can also be pressure swing adsorption method or Vacuum pressure swing adsorption process remover.Second compressor 23 is used to the gaseous mixture for entering decompression tank being pressurized to suitable pressure.
Fig. 2 shows the flow chart of the method for the Joint Production iron-containing product of the present invention.The 2 explanation party with reference to the accompanying drawings The step of method.
In step sl, fresh also Primordial Qi is passed through into the first blending tank 11, makes fresh also Primordial Qi and the first blending tank 11 In gas mixing.Specifically, fresh also Primordial Qi can be the diversified forms such as gas renormalizing gas, coal gasification gas, coal pyrolysis gas, Its bulk composition is the requirement that the gaseous mixture that hydrogen and carbon monoxide form and ratio can reach reaction.Above-mentioned fresh also Primordial Qi After being mixed with the first shaft furnace top gas of conversion and carbon dioxide removal, composition can reach H2/ CO ratios are 3~5, effectively reduction The volume ratio that gas (i.e. the volume of hydrogen and carbon monoxide and) accounts for total gas is more than 0.85.
In step s 2, the gas boosting discharged the first blending tank 11 using compressor 12 is made to the first preset pressure The gas after supercharging is heated to the first preset temperature with heating furnace 13, gas is passed through the first shaft furnace 10 afterwards.
In step s3, put into the first iron-bearing mineral into the first shaft furnace 10, such as vanadium titano-magnetite or contain vanadium ferrotianium All kinds of ore pellets or lump ore.Gas and vanadium titano-magnetite haptoreaction in first shaft furnace 10, obtain the first top gas.Tool Body, in the first shaft furnace 10, also it is anti-under suitable pressure, temperature conditionss with vanadium titano-magnetite direct-reduction to occur for Primordial Qi Should, generate rich vanadium titanium sponge iron product and the first top gas.Reaction zone temperature is in the range of 950~1100 DEG C in shaft furnace, a side Preferentially with hydrogen reduction reaction can occur for face raw mineral materials after temperature is more than 850 DEG C, and this reaction is the endothermic reaction, so compared with High temperature contributes to the quick progress of reaction, and another aspect hydrogen steams with iron mineral direct reduction reactor gaseous product for water Gas, and only very least a portion of carbon monoxide participates in reaction and generates carbon dioxide gas.
In step s 4, gas outlet of first top gas through the first shaft furnace 10 enters dust pelletizing system 14, utilizes dust pelletizing system 14 pair of first top gas carries out dedusting, and the gas by dedusting is reacted in transformation system 17 by the carbon monoxide and water in gas Steam is transformed to H2And CO2.Specifically, the first shaft furnace top gas after dry deduster dedusting by being passed through transformation system 17, transformation series 17 pair of first shaft furnace top gas of system modifies, and H occurs2O+CO=H2+CO2Reaction improves the hydrogen content in top gas, together When make use of in the first top gas contained vapor.
In step s 5, the first CO is utilized2Remover 18 is rich in H by what is obtained in step S42And CO2Gas in CO2 Removing, obtains being rich in H2Gas.
In step s 6, in order to realize the reasonable utilization of the first top gas, the carbon dioxide removal that will be obtained in step S5 A part for gas afterwards is transmitted back in the first blending tank 11 is passed through second to supplement the first also Primordial Qi raw material, another part gas Blending tank 15.Into this portion gas of the second blending tank 15 and the gas mixing from compressor 23 to go back Primordial Qi as second Raw material.Which part hydrogen-rich gas is returned in the first blending tank 11 before the first shaft furnace 10 and mixed with fresh also Primordial Qi, a side Face drastically increases the utilization rate of hydrogen in also Primordial Qi, on the other hand effectively reduces and contains for the hydrogen in fresh also Primordial Qi The requirement of amount, reduce the preparation difficulty of fresh also Primordial Qi.
In the step s 7, carbon raw material (such as coal dust or carbon dust etc.) is added into modification heating furnace 16 so that itself and entrance Modify the CO in the gas of heating furnace2(i.e. from the 2nd CO2The CO of remover2) react generation CO, while is added using modification Gas in stove is heated to the second preset temperature by hot stove, is so obtained second and is gone back Primordial Qi.Specifically, heating furnace is modified on the one hand By the 2nd CO2The rich CO that remover 22 obtains2Gas by with carbon raw material reaction modification be CO, on the other hand will mix after Second also Primordial Qi be heated to the second shaft furnace 20 requirement temperature.Understand in conjunction with the embodiments, the gas master in the second blending tank 15 To include by the first top gas (its bulk composition is hydrogen and carbon monoxide) after processing and pass through the second compressor 23 The removing CO of supplement2The gaseous mixture of rich carbon monoxide and hydrogen afterwards.Based on second also Primordial Qi constituent and content requirement, With the CO gas mixings after modification in heating furnace 16 is modified, it can ensure to be passed through second gas from the second blending tank 15 The also Primordial Qi H of the second of shaft furnace 202/ CO ratios are 1~3, effectively also Primordial Qi (H2+ CO) relative to volume ratio >=0.85 of total gas Component requirements.Second also Primordial Qi reaches 800~900 DEG C by modifying the temperature after heating of heating furnace 16.Wherein modify heating furnace 16 Using on the one hand can improve gas effciency, reduce the CO of system2Discharge capacity, on the other hand gaseous mixture can be added Heat, a special furnace apparatus can be saved.
In step s 8, the gas that will warm up the second preset temperature is transported to the second shaft furnace 20, and to the second shaft furnace 20 The second iron-bearing mineral of interior input, such as iron ore concentrate or other high iron ore pellets or lump ore.Gas in second shaft furnace 20 and Two iron-bearing mineral haptoreactions, obtain the second top gas and sponge iron.Specifically, the second shaft furnace 20 also Primordial Qi component requirements H2/ CO ratios are 1~3, effectively also Primordial Qi (H2+ CO) volume ratio >=0.85,800~900 DEG C of reaction temperature, 0.1Mpa≤furnace pressure ≤0.3MPa。
In step s 9, second top gas is carried out using water scrubber 21 washing cooling and dedusting, utilizes the 2nd CO afterwards2 Remover 22 is by the CO in gas2Separation, by the CO of separation2Modification heating furnace 16 is transported to as modification raw material to supplement second CO also in Primordial Qi.CO will be separated simultaneously2Residual gas afterwards is transported to compressor 23.
The residual gas for making to obtain in step S9 using compressor 23 in step slo is pressurized to the second preset pressure, and Gas after supercharging is transported to the second blending tank 15 to realize recycling for gas.
It should be understood that although method and step here is described as arranging generation in a certain order, such step Suddenly the order outside order described herein can be used to implement operation.Further it is appreciated that some steps can be same Shi Zhihang, other steps can be added, or some steps described here can be omitted.In other words, here in order to illustrate certain The purpose of a little embodiments and foregoing description is provided, and should not be construed in any way to limit claimed invention.
Illustrate the process of double shaft furnace Joint Productions with reference to specific embodiment.
Embodiment 1
V-ti Bearing Magnetite Pellets are put into the first shaft furnace 10, iron ore pellets are put into the second shaft furnace 20.It is fresh to go back Primordial Qi is mixed so that mixed gas composition reaches H with hydrogen-rich gas in the first blending tank 112It is 5 with CO volume ratios, effectively reduction Gas (H2+ CO) volume ratio be higher than 0.95.Mixed gas is passed through the first compressor 12, mixture pressure is reached 0.8MPa, it After be passed through heating furnace 13 and heated, its temperature is reached 1100 DEG C.Gaseous mixture after heating be passed through in the first shaft furnace 10 and Reaction generation vanadium titanium sponge iron and the first top gas in first shaft furnace 10.First furnace roof atmospheric pressure is 0.7MPa.Removed by dry Dirt system 14, the CO of transformation system 17 and the first2Hydrogen-rich gas is obtained after the processing of remover 18.Part hydrogen-rich gas is transmitted back to One blending tank 11 goes back Primordial Qi to supplement first, and pressure is down to 0.3MPa after another part hydrogen-rich gas is passed through the second blending tank 15, Gas mixing of the gas with being pressurized to 0.3MPa through the second compressor 23 be depressured simultaneously after, gaseous mixture are passed through modification heating furnace 16 Heated.Additionally by the 2nd CO2The CO 2 enriched gas that separator 22 separates is also passed into modification heating furnace 16 and and carbon Powder carries out reaction generation CO gas.Modification heating furnace 16, which carries out the gaseous mixture after modification heating, can be used as the second reduction Gas, its H2It is 3 with CO volume ratios, effectively also Primordial Qi (H2+ CO) volume ratio >=0.95, temperature is 900 DEG C.Second also Primordial Qi is led to Enter in the second shaft furnace 20, the reaction generation sponge iron in the second shaft furnace 20, while generate the second top gas.Second top gas passes through After water scrubber 21 is washed, via the 2nd CO2Remover processing, by the CO in gas2Separation, obtain rich also Primordial Qi and rich CO2Gas Body.Richness also Primordial Qi is passed through after the second compressor 23 is pressurized and is passed through decompression tank, remaining carbon dioxide enriched gas part as needed Modification heating furnace 16 and carbon generation carbon monoxide modification are passed through, remaining is used for other purposes.Recycling for gas in system is achieved in, Save the energy and resource.
Each tolerance is as follows in embodiment：
First goes back Primordial Qi：1200Nm3/h；First top gas：1280Nm3/h；Gas after transformation system processing：1200Nm3/h； First CO2Hydrogen rich gas after separation：1100Nm3/h；First CO2Hydrogen rich gas is passed through decompression tank gas after remover separation：500Nm3/h； Second is compressor gas supplied：500Nm3/h；Second goes back Primordial Qi：1500Nm3/h；Second top gas 1550Nm3/h；After water scrubber processing Gas：1400Nm3/h；Modify carbon dioxide enriched air inlet：400Nm3/h。
Embodiment 2
V-ti Bearing Magnetite Pellets are put into the first shaft furnace 10, iron ore pellets are put into the second shaft furnace 20.It is fresh to go back Primordial Qi is mixed so that mixed gas composition reaches H with hydrogen-rich gas in the first blending tank 112It is 5 with CO volume ratios, effectively reduction Gas (H2+ CO) volume ratio be higher than 0.90.Mixed gas is passed through the first compressor 12, mixture pressure is reached 0.7MPa, it After be passed through heating furnace 13 and heated, its temperature is reached 1050 DEG C.Gaseous mixture after heating be passed through in the first shaft furnace 10 and Reaction generation vanadium titanium sponge iron and the first top gas in first shaft furnace 10.First furnace roof atmospheric pressure is 0.65MPa.Removed by dry Dirt system 14, the CO of transformation system 17 and the first2Hydrogen-rich gas is obtained after the processing of remover 18.Part hydrogen-rich gas is transmitted back to One blending tank 11 goes back Primordial Qi to supplement first, and pressure is down to 0.2MPa after another part hydrogen-rich gas is passed through the second blending tank 15, Gas mixing of the gas with being pressurized to 0.2MPa through the second compressor 23 be depressured simultaneously after, gaseous mixture are passed through modification heating furnace 16 Heated.Additionally by the 2nd CO2The CO 2 enriched gas that separator 22 separates is also passed into modification heating furnace 16 and and carbon Powder carries out reaction generation CO gas.Modification heating furnace 16, which carries out the gaseous mixture after modification heating, can be used as the second reduction Gas, its H2It is 2.2 with CO volume ratios, effectively also Primordial Qi (H2+ CO) volume ratio >=0.85, temperature is 900 DEG C.Primordial Qi is gone back by second It is passed through in the second shaft furnace 20, the reaction generation sponge iron in the second shaft furnace 20, while generates the second top gas.Second top gas leads to After crossing the washing of water scrubber 21, via the 2nd CO2Remover processing, by the CO in gas2Separation, obtain rich also Primordial Qi and rich CO2Gas Body.Richness also Primordial Qi is passed through after the second compressor 23 is pressurized and is passed through decompression tank, remaining carbon dioxide enriched gas part as needed Modification heating furnace 16 and carbon generation carbon monoxide modification are passed through, remaining is used for other purposes.Recycling for gas in system is achieved in, Save the energy and resource.
Each tolerance is as follows in embodiment：
First goes back Primordial Qi：1000Nm3/h；First top gas：1080Nm3/h；Gas after transformation system processing：1000Nm3/h； First CO2Hydrogen rich gas after separation：900Nm3/h；First CO2Hydrogen rich gas is passed through decompression tank gas after remover separation：400Nm3/h；The Two is compressor gas supplied：400Nm3/h；Second goes back Primordial Qi：1400Nm3/h；Second top gas 1450Nm3/h；Gas after water scrubber processing： 1300Nm3/h；Modify carbon dioxide enriched air inlet：300Nm3/h。
Embodiment 3
V-ti Bearing Magnetite Pellets are put into the first shaft furnace 10, iron ore pellets are put into the second shaft furnace 20.It is fresh to go back Primordial Qi is mixed so that mixed gas composition reaches H with hydrogen-rich gas in the first blending tank 112It is 4 with CO volume ratios, effectively reduction Gas (H2+ CO) volume ratio be higher than 0.95.Mixed gas is passed through the first compressor 12, mixture pressure is reached 0.4MPa, it After be passed through heating furnace 13 and heated, its temperature is reached 1000 DEG C.Gaseous mixture after heating be passed through in the first shaft furnace 10 and Reaction generation vanadium titanium sponge iron and the first top gas in first shaft furnace 10.First furnace roof atmospheric pressure is 0.3MPa.Removed by dry Dirt system 14, the CO of transformation system 17 and the first2Hydrogen-rich gas is obtained after the processing of remover 18.Part hydrogen-rich gas is transmitted back to One blending tank 11 to supplement the first also Primordial Qi, another part hydrogen-rich gas be passed through after the second blending tank 15 with through the second compressor 23 0.3MPa gas mixing is pressurized to, gaseous mixture is passed through modification heating furnace 16 and heated.Additionally by the 2nd CO2Separator 22 The CO 2 enriched gas of separation is also passed into modification heating furnace 16 and carries out reaction generation CO gas with carbon dust.Modification adds Hot stove 16, which carries out the gaseous mixture after modification heating, can be used as second to go back Primordial Qi, its H2It is 2 with CO volume ratios, effectively also Primordial Qi (H2+ CO) volume ratio >=0.9, temperature are 850 DEG C.Second also Primordial Qi is passed through in the second shaft furnace 20, life is reacted in the second shaft furnace 20 Into sponge iron, while generate the second top gas.After second top gas is washed by water scrubber 21, via the 2nd CO2At remover Reason, by the CO in gas2Separation, obtain rich also Primordial Qi and rich CO2Gas.Rich also Primordial Qi is passed through after the second compressor 23 is pressurized Decompression tank is passed through, remaining carbon dioxide enriched gas is partly passed through modification heating furnace 16 and changed with carbon generation carbon monoxide as needed Matter, remaining is used for other purposes.Recycling for gas in system is achieved in, saves the energy and resource.
Each tolerance is as follows in embodiment：
First goes back Primordial Qi：1000Nm3/h；First top gas：1060Nm3/h；Gas after conversion process：950Nm3/h；First CO2Hydrogen rich gas after separation：850Nm3/h；First CO2Hydrogen rich gas is passed through decompression tank gas after remover separation：300Nm3/h；Second pressure Contracting machine supplies：500Nm3/h；Second goes back Primordial Qi：1500Nm3/h；Second top gas 1400Nm3/h；Gas after water scrubber processing： 1300Nm3/h；Modify carbon dioxide enriched air inlet：350Nm3/h。
Embodiment 4
V-ti Bearing Magnetite Pellets are put into the first shaft furnace 10, iron ore pellets are put into the second shaft furnace 20.It is fresh to go back Primordial Qi is mixed so that mixed gas composition reaches H with hydrogen-rich gas in the first blending tank 112It is 3 with CO volume ratios, effectively reduction Gas (H2+ CO) volume ratio be higher than 0.85.Mixed gas is passed through the first compressor 12, mixture pressure is reached 0.65MPa, it After be passed through heating furnace 13 and heated, its temperature is reached 950 DEG C.Gaseous mixture after heating is passed through in the first shaft furnace 10 and the Reaction generation vanadium titanium sponge iron and the first top gas in one shaft furnace 10.First furnace roof atmospheric pressure is 0.55MPa.By doing dedusting System 14, the CO of transformation system 17 and the first2Hydrogen-rich gas is obtained after the processing of remover 18.Part hydrogen-rich gas is transmitted back to first Blending tank 11 goes back Primordial Qi to supplement first, and pressure is down to 0.18MPa after another part hydrogen-rich gas is passed through the second blending tank 15, together When decompression after gas and 0.18MPa gas mixing is pressurized to through the second compressor 23, gaseous mixture is passed through modification heating furnace 16 Heated.Additionally by the 2nd CO2The CO 2 enriched gas that separator 22 separates is also passed into modification heating furnace 16 and and carbon Powder carries out reaction generation CO gas.Modification heating furnace 16, which carries out the gaseous mixture after modification heating, can be used as the second reduction Gas, its H2It is 1.8 with CO volume ratios, effectively also Primordial Qi (H2+ CO) volume ratio >=0.85, temperature is 800 DEG C.Primordial Qi is gone back by second It is passed through in the second shaft furnace 20, the reaction generation sponge iron in the second shaft furnace 20, while generates the second top gas.Second top gas leads to After crossing the washing of water scrubber 21, via the 2nd CO2Remover processing, by the CO in gas2Separation, obtain rich also Primordial Qi and rich CO2Gas Body.Richness also Primordial Qi is passed through after the second compressor 23 is pressurized and is passed through decompression tank, remaining carbon dioxide enriched gas part as needed Modification heating furnace 16 and carbon generation carbon monoxide modification are passed through, remaining is used for other purposes.Recycling for gas in system is achieved in, Save the energy and resource.
Each tolerance is as follows in embodiment：
First goes back Primordial Qi：1000Nm3/h；First top gas：1100Nm3/h；Gas after conversion process：1000Nm3/h；First CO2Hydrogen rich gas after separation：900Nm3/h；First CO2Hydrogen rich gas is passed through decompression tank gas after remover separation：450Nm3/h；Second pressure Contracting machine supplies：500Nm3/h；Second goes back Primordial Qi：1350Nm3/h；Second top gas 1280Nm3/h；Gas after water scrubber processing： 1250Nm3/h；Modify carbon dioxide enriched air inlet：200Nm3/h。
Embodiment 5
V-ti Bearing Magnetite Pellets are put into the first shaft furnace 10, iron ore pellets are put into the second shaft furnace 20.It is fresh to go back Primordial Qi is mixed so that mixed gas composition reaches H with hydrogen-rich gas in the first blending tank 112It is 3 with CO volume ratios, effectively reduction Gas (H2+ CO) volume ratio be higher than 0.85.Mixed gas is passed through the first compressor 12, mixture pressure is reached 0.4MPa, it After be passed through heating furnace 13 and heated, its temperature is reached 950 DEG C.Gaseous mixture after heating is passed through in the first shaft furnace 10 and the Reaction generation vanadium titanium sponge iron and the first top gas in one shaft furnace 10.First furnace roof atmospheric pressure is 0.3MPa.By doing dedusting System 14, the CO of transformation system 17 and the first2Hydrogen-rich gas is obtained after the processing of remover 18.Part hydrogen-rich gas is transmitted back to first Blending tank 11 goes back Primordial Qi to supplement first, and pressure is down to 0.1MPa after another part hydrogen-rich gas is passed through the second blending tank 15, together When decompression after gas and 0.1MPa gas mixing is pressurized to through the second compressor 23, gaseous mixture is passed through modification heating furnace 16 and entered Row heating.Additionally by the 2nd CO2The CO 2 enriched gas that separator 22 separates is also passed into modification heating furnace 16 and and carbon dust Carry out reaction generation CO gas.Modification heating furnace 16, which carries out the gaseous mixture after modification heating, can be used as second to go back Primordial Qi, Its H2It is 1 with CO volume ratios, effectively also Primordial Qi (H2+ CO) volume ratio >=0.85, temperature is 800 DEG C.Second also Primordial Qi is passed through the In two shaft furnaces 20, the reaction generation sponge iron in the second shaft furnace 20, while generate the second top gas.Second top gas passes through washing After tower 21 is washed, via the 2nd CO2Remover processing, by the CO in gas2Separation, obtain rich also Primordial Qi and rich CO2Gas.Will Richness also Primordial Qi is passed through decompression tank after being passed through the supercharging of the second compressor 23, and remaining carbon dioxide enriched gas is partly passed through as needed to be changed Matter heating furnace 16 and carbon generation carbon monoxide modification, remaining is used for other purposes.Recycling for gas in system is achieved in, saves energy Source and resource.
Each tolerance is as follows in embodiment：
First goes back Primordial Qi：1000Nm3/h；First top gas：1100Nm3/h；Gas after conversion process：1000Nm3/h；First CO2Hydrogen rich gas after separation：900Nm3/h；First CO2Hydrogen rich gas is passed through decompression tank gas after remover separation：450Nm3/h；Second pressure Contracting machine supplies：500Nm3/h；Second goes back Primordial Qi：1350Nm3/h；Second top gas 1280Nm3/h；Gas after water scrubber processing： 1250Nm3/h；Modify carbon dioxide enriched air inlet：200Nm3/h。
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention Enclose.

Claims (10)

1. a kind of double shaft furnace systems for Joint Production, it is characterised in that the system includes the first blending tank, the first compression Machine, heating furnace, the first shaft furnace, dust pelletizing system, transformation system, the first CO2Remover, the second blending tank, modification heating furnace, second Shaft furnace, water scrubber, the 2nd CO2Remover, the second compressor and the connecting line between them, wherein：
First blending tank includes the first air inlet, the second air inlet and gas outlet, the first air inlet and fresh also Primordial Qi supply Device connects, and gas outlet connects with the air inlet of the first compressor；
The gas outlet of first compressor connects with the air inlet of heating furnace；
The gas outlet of heating furnace connects with the air inlet of the first shaft furnace；
The gas outlet of first shaft furnace connects with the air inlet of dust pelletizing system；
The gas outlet of dust pelletizing system connects with transformation system air inlet；
Transformation system also includes another air inlet, and another air inlet connects with vapor feeding mechanism, the gas outlet of transformation system With the first CO2The air inlet connection of remover；
First CO2Remover includes at least two-way outlet pipe, wherein the second air inlet of outlet pipe and the first blending tank all the way Connection, another way outlet pipe connect with the air inlet of the second blending tank；
The gas outlet of second blending tank connects with modifying the air inlet of heating furnace；
Modification heating furnace is provided with carbon raw material adding mouth, and the gas outlet for modifying heating furnace connects with the air inlet of the second shaft furnace；
The gas outlet of second shaft furnace connects with the air inlet of water scrubber；
The gas outlet of water scrubber and the 2nd CO2The air inlet connection of remover；
2nd CO2Remover includes at least two-way outlet pipe, wherein the air inlet of outlet pipe and the second compressor connects all the way Logical, another way outlet pipe connects with modification heating furnace；
The gas outlet of second compressor connects with the second blending tank.
2. double shaft furnace systems according to claim 1 for Joint Production, it is characterised in that the dust pelletizing system is dry Dust pelletizing system.
3. double shaft furnace systems according to claim 2 for Joint Production, it is characterised in that the dry dust pelletizing system is Cyclone bag dust collector and/or electric cleaner.
4. double shaft furnace systems according to claim 1 for Joint Production, it is characterised in that the first CO2Remover And/or the 2nd CO2Remover is chemical method remover, pressure swing adsorption method remover or vacuum pressure swing adsorption process remover.
5. double shaft furnace systems according to claim 1 for Joint Production, it is characterised in that in the first CO2Remover with The pressure of the gas of the outlet pipe discharge of the air inlet connection of second blending tank is higher than the second reducing gas for shaft furnace pressure requirements In the case of, the second blending tank is decompression tank.
6. double shaft furnace systems according to claim 1 for Joint Production, it is characterised in that the fresh also Primordial Qi master To include H2And CO.
7. a kind of method of system combined production iron-containing product using as described in claim any one of 1-6, it is characterised in that Comprise the following steps：
1) fresh also Primordial Qi is passed through into the first blending tank, makes fresh also Primordial Qi and the gas mixing in the first blending tank；
2), will supercharging using heating furnace using the first compressor by the gas boosting that the first blending tank discharge to the first preset pressure Gas afterwards is heated to the first preset temperature, and gas is passed through into the first shaft furnace afterwards；
3) put into the first iron-bearing mineral into the first shaft furnace, gas and the first iron-bearing mineral haptoreaction in the first shaft furnace, obtain To the first top gas and the first iron content product；
4) dedusting is carried out to the first top gas using dust pelletizing system, the gas by dedusting is reacted in gas in transformation system Carbon monoxide and vapor be transformed to H2And CO2；
5) the first CO is utilized2Remover is rich in H by what step 4) obtained2And CO2Gas in CO2Removing, obtains being rich in H2's Gas；
6) it is rich in H by what is obtained in step 5)2The part of gas be transmitted back to the first blending tank, be rich in H by remaining2Gas Body is transported to the second blending tank so that it is with the gas mixing in the second blending tank and is passed through modification heating furnace；
7) carbon raw material is added into modification heating furnace so that it from the second shaft furnace and through water scrubber to the second top gas with entering Cooling and dedusting and the 2nd CO are washed in water-filling2CO in second top gas of remover separation2React generation CO, utilizes simultaneously Gas in stove is heated to the second preset temperature by modification heating furnace；
8) gas that will warm up the second preset temperature is transported to the second shaft furnace, and input second contains iron ore into the second shaft furnace Thing, gas and the second iron-bearing mineral haptoreaction in the second shaft furnace, obtains the second top gas and the second iron content product；
9) the second top gas is carried out using water scrubber washing cooling and dedusting, utilizes the 2nd CO afterwards2Remover is by gas CO2Separation, by the CO of separation2Modification heating furnace is transported to, while CO will be separated2Residual gas afterwards is transported to the second compression Machine；
10) residual gas in step 9) is made to be pressurized to the second preset pressure using the second compressor, and by the gas after increase The second blending tank is transported to realize recycling for gas.
8. the method for Joint Production iron-containing product according to claim 7, it is characterised in that the step 6) is additionally included in Make to be rich in H in second blending tank2The pressure of gas be down to the second preset pressure.
9. the method for Joint Production iron-containing product according to claim 7, it is characterised in that first preset pressure is big In second preset pressure.
10. the method for Joint Production iron-containing product according to claim 7, it is characterised in that wherein：
For first shaft furnace to handle the gas-based shaft kiln of sefstromite thing, the first shaft furnace enters H in stove also Primordial Qi2With CO volume ratios For 3~5, H2With CO cumulative volume account for the first shaft furnace enter stove reducing gas product than be more than or equal to 0.85, reaction temperature be 950~ 1100 DEG C, furnace pressure is maintained between 0.4MPa and 0.8MPa；
For second shaft furnace to handle the gas-based shaft kiln of iron ore concentrate, the second shaft furnace enters H in stove also Primordial Qi2With CO volume ratios be 1~ 3, H2The second shaft furnace, which is accounted for, with CO cumulative volume enters stove reducing gas product than being more than or equal to 0.85, reaction temperature is 800~900 DEG C, Furnace pressure is maintained between 0.1MPa and 0.3MPa.
CN201710806210.3A 2017-09-08 2017-09-08 A kind of double shaft furnace system and method for Joint Production Pending CN107513596A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111270036A (en) * 2020-04-05 2020-06-12 上海泰普星坦新材料有限公司 System and process method for producing sponge iron by direct reduction of hydrogen energy
CN111270037A (en) * 2020-04-05 2020-06-12 上海泰普星坦新材料有限公司 System and process method for producing sponge iron by directly reducing hydrogen-rich synthesis gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111270036A (en) * 2020-04-05 2020-06-12 上海泰普星坦新材料有限公司 System and process method for producing sponge iron by direct reduction of hydrogen energy
CN111270037A (en) * 2020-04-05 2020-06-12 上海泰普星坦新材料有限公司 System and process method for producing sponge iron by directly reducing hydrogen-rich synthesis gas

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