CN106995864A - Coal gas of converter utilizes system and the method for utilizing coal gas of converter - Google Patents
Coal gas of converter utilizes system and the method for utilizing coal gas of converter Download PDFInfo
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- CN106995864A CN106995864A CN201710179439.9A CN201710179439A CN106995864A CN 106995864 A CN106995864 A CN 106995864A CN 201710179439 A CN201710179439 A CN 201710179439A CN 106995864 A CN106995864 A CN 106995864A
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- Prior art keywords
- gas
- converter
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- outlet
- reducing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- 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
- Y02P10/25—Process efficiency
Abstract
The invention discloses a kind of coal gas of converter using system and using the method for coal gas of converter, the coal gas of converter is included using system：Converter, boiler and reburner, the exhaust outlet of the converter are connected with the gas outlet of the boiler with the reburner；Decarbonizing tower, the outlet of the reburner is connected with the import of the decarbonizing tower；Nitrogen separation device, the outlet of the decarbonizing tower is connected with the import of the nitrogen separation device；Gas base directly reducing device, the outlet of the nitrogen separation device is connected with the air inlet of the gas base directly reducing device.The coal gas of converter of the embodiment of the present invention utilizes system, realizes the coupling of pneumatic steelmaking and gas base directly reducing device, both can cost-effectively utilize coal gas of converter, and the investment of gas base directly reducing device can be reduced again, reduces the production cost of DRI.
Description
Technical field
The invention belongs to technical field of coal chemical industry, in particular to a kind of coal gas of converter is using system and utilizes converter
The method of coal gas.
Background technology
Pneumatic steelmaking can produce a large amount of coal gas during blowing, and its temperature is up to 1400 DEG C -1600 DEG C, CO in coal gas of converter
Content reaches 60-85%, and its calorific capacity reaches 7MJ/M3More than, because gas temperature and CO contents are high, air is run into after plug for outlet
Just burn immediately.In correlation technique, mainly there are following several ways to the utilization of coal gas of converter：(1) after coal gas is arbitrarily burnt
Diffused after cooling, dedusting, this mode, which not only wastes ample resources, can also cause serious environmental pollution；(2) coal gas is returned
Receive and utilize, such as separate CO2CO is enriched with, CO separation is complicated, can remaining substantial amounts of N2, and CO only makees fuel, application is narrow,
Recyclable coal gas amount is few, i.e., ton steel gas recovery only has 70m3, unit calorific capacity only has 5MJ/m3Left and right.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.Therefore, the present invention proposes a kind of turn
Producer gas utilizes system, and the coal gas of converter can effectively utilize the production that coal gas of converter carries out reduced iron using system.
Coal gas of converter according to embodiments of the present invention utilizes system, including：Converter, boiler and reburner, the converter
Exhaust outlet is connected with the gas outlet of the boiler with the reburner；Decarbonizing tower, the outlet of the reburner and the decarburization
The import of tower is connected；Nitrogen separation device, the outlet of the decarbonizing tower is connected with the import of the nitrogen separation device；Gas base is straight
Reduction apparatus is connect, the outlet of the nitrogen separation device is connected with the air inlet of the gas base directly reducing device.
Coal gas of converter according to embodiments of the present invention utilizes system, by coal gas of converter by conversion, decarburization, denitrification technique after
For gas base directly reducing, the coupling of pneumatic steelmaking and gas base directly reducing device is realized, both can cost-effectively utilize and turn
Producer gas, can reduce the investment of gas base directly reducing device again, reduce the production cost of DRI.
Coal gas of converter according to an embodiment of the invention utilizes system, and the boiler is waste heat boiler, and the converter
Exhaust outlet be connected by blast pipe with the heat exchanger of the waste heat boiler, and the coal gas of converter after heat exchange inputs the conversion
Stove.
Coal gas of converter according to an embodiment of the invention utilizes system, in addition to：Scrubbing tower, the scrubbing tower is connected on
Between the outlet and the import of the decarbonizing tower of the reburner.
Coal gas of converter according to an embodiment of the invention utilizes in system, the decarbonizing tower and is placed with alkaline solution.
Coal gas of converter according to an embodiment of the invention utilizes system, in addition to：Heating furnace, the heating furnace is connected to
Between the nitrogen separation device and the gas base directly reducing device.
Coal gas of converter according to an embodiment of the invention utilizes system, in addition to：Compressor and degreaser, the pressure
The import of contracting machine is connected with the outlet of the nitrogen separation device, the outlet of the compressor and the import phase of the degreaser
Even, the outlet of the degreaser is connected with the import of the heating furnace.
The invention also provides a kind of method that coal gas of converter is utilized using system using any of the above-described kind of coal gas of converter,
Comprise the following steps：Gas conversion, coal gas of converter and vapor are reacted；Carbonization treatment, is removed in reacted mixed gas
CO2；Nitrogen in nitrogen separation, separation residual gas, to obtain including CO and H2Reducing gas；Reducing iron ore, uses institute
State reducing gas reducing iron ore or iron ore pellets.
Coal gas of converter according to an embodiment of the invention utilizes system, before the step gas conversion, described will turn
Producer gas inputs the heat exchanger of waste heat boiler to produce the vapor.
Coal gas of converter according to an embodiment of the invention utilizes system, is taken off in the step gas conversion and the step
Also include step between carbon processing：Mixed gas after washing reaction.
Coal gas of converter according to an embodiment of the invention utilizes system, also includes before the step reducing iron ore
Step：Reducing gas is heated, the reducing gas is heated to 800 DEG C -1100 DEG C.
Coal gas of converter according to an embodiment of the invention utilizes system, is also wrapped before step heating reducing gas
Include step：The reducing gas is compressed, and carries out deoiling treatment.
The method of the utilization coal gas of converter has with above-mentioned coal gas of converter using system relative to prior art
Dominant Facies are same, will not be repeated here.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the structural representation that coal gas of converter according to embodiments of the present invention utilizes system；
Fig. 2 is the method schematic diagram of utilization coal gas of converter according to embodiments of the present invention.
Reference：
Coal gas of converter utilizes system 100,
Converter 1, boiler 2, heat exchanger 2a, reburner 3, scrubbing tower 4, decarbonizing tower 5, nitrogen separation device 6, heating furnace 7, gas
Base directly reducing device 8.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Coal gas of converter according to embodiments of the present invention, which is described, below with reference to Fig. 1 utilizes system 100.
As shown in figure 1, coal gas of converter according to an embodiment of the invention includes converter 1, boiler 2 using system 100, turned
Change stove 3, decarbonizing tower 5, nitrogen separation device 6 and gas base directly reducing device 8.
Wherein, blast pipe can be provided with converter 1, to discharge coal gas of converter, the main component of coal gas of converter is CO, CO2
And N2, boiler 2 can produce vapor, and the exhaust outlet of converter 1 is connected with reburner 3, and coal gas of converter is passed into reburner 3
Interior, the gas outlet of boiler 2 is connected with reburner 3, and vapor is passed into reburner 3, can be high temperature ring in reburner 3
Border, so that CO and H in coal gas of converter2O reactions obtain CO2And H2, chemical equation is CO+H2O=CO2+H2, i.e. the CO of part
By H2O reduction obtains H2。
The outlet of reburner 3 is connected with the import of decarbonizing tower 5, and decarbonizing tower 5 is used to remove CO2, that is, the gaseous mixture after converting
Body is pipelined in decarbonizing tower 5, to remove the CO in mixed gas2, alternatively, alkali can be placed with decarbonizing tower 5
Property solution, decarburization principle：CO2+ alkaline solution=carbonic acid saline solution；Such as alkaline solution is sodium hydroxide solution or potassium hydroxide
Solution.
The outlet of decarbonizing tower 5 is connected with the import of nitrogen separation device 6, and nitrogen separation device 6 is used to separate carbonization treatment
The N in mixed gas afterwards2, to obtain including CO and H2Reducing gas, now the main component of reducing gas be CO and
H2.Nitrogen separation can use physical method, such as nitrogen separation device 6 is set to cooling condensing to separate N2。
The outlet of nitrogen separation device 6 is connected with the air inlet of gas base directly reducing device 8.The conversion of coal gas of converter process,
Obtained after decarburization, denitrification processing with CO+H2Based on reducing gas, also comprising a small amount of nitrogen, CO2、H2O, reducing gas enters gas
Can be with reducing iron ore or iron ore pellets after base directly reducing device 8, gas base directly reducing device 8 can be shaft furnace.
Coal gas of converter according to embodiments of the present invention utilizes system 100, and coal gas of converter is passed through into conversion, decarburization, denitrification work
It is used for gas base directly reducing after skill, realizes the coupling of pneumatic steelmaking and gas base directly reducing device 8, both can economical and effective land productivity
With coal gas of converter, the investment of gas base directly reducing device 8 can be reduced again, reduce the production cost of DRI.
Coal gas of converter according to a preferred embodiment of the present invention utilizes system 100, as shown in figure 1, boiler 2 can be
Waste heat boiler, and the exhaust outlet of converter 1 is connected by blast pipe with the heat exchanger 2a of waste heat boiler, and the coal gas of converter after heat exchange
Input reburner 3.
That is, the high-temperature exhaust pipe of converter 1 is connected with the heat exchanger 2a of waste heat boiler, flue gas passes through high-temperature exhaust pipe
The heat exchanger 2a for being input to waste heat boiler carrys out heating boiler 2 to produce vapor, by the coal gas of converter after heat exchange again with vapor
The heating response of reburner 3 is inputted by pipeline.The heating of waste heat boiler is carried out by using the high temperature sensible heat of coal gas of converter, fully
The sensible heat of coal gas of converter is make use of, whole coal gas of converter is higher using the efficiency of system 100.
Coal gas of converter according to an embodiment of the invention utilizes system 100, coal gas of converter and boiler that converter 1 is exported
The ratio of the vapor of 2 outputs is adjustable.In other words, steam vapour amount needed for coal gas of converter conversion can be wanted according to reducing gas
The H2/CO ratios asked are adjustable, so that the reaction in reburner 3 is more abundant.Such as, tune can be set on the output pipe of boiler 2
Save valve.
As shown in figure 1, coal gas of converter according to a preferred embodiment of the present invention utilizes system 100, in addition to：Washing
Tower 4, scrubbing tower 4 can be connected between the outlet of reburner 3 and the import of decarbonizing tower 5.So, the gas after conversion can be removed
The impurity such as the dust in body, prevent from polluting follow-up equipment.
As shown in figure 1, coal gas of converter can also be included using system 100：Heating furnace 7, heating furnace 7 is connected to nitrogen separation
Between device 6 and gas base directly reducing device 8, heating furnace 7 is used to reducing gas being heated to target temperature, prevents reducing gas
Influence the temperature in gas base directly reducing device 8.Preferably, heating furnace 7 is set to reducing gas being heated to 800 DEG C -1100
DEG C, such as reducing gas is heated to 800 DEG C -950 DEG C just feeding gas base directly reducing devices 8.
Further, coal gas of converter can also be included using system 100：Compressor, the import of compressor and nitrogen separation
The outlet of device 6 is connected, and the outlet of compressor is connected with the import of heating furnace 7, and compressor is used to compress reducing gas, to strengthen
Gas density, improves reaction efficiency.Further, coal gas of converter can also be included using system 100：Degreaser, deoil dress
Put between the outlet for being connected to compressor and the import of heating furnace 7, the import of compressor and the outlet phase of nitrogen separation device 6
Even, the outlet of compressor is connected with the import of degreaser, and the outlet of degreaser is connected with the import of heating furnace 7, and deoil dress
Put for removing the greasy dirt in reducing gas, prevent from polluting the reaction in gas base directly reducing device 8.That is, will convert,
Reducing gas after decarburization, denitrification processing is heated by just inputting heating furnace 7 after compressor compresses, oil removal treatment.
The specific embodiment that coal gas of converter according to embodiments of the present invention utilizes system 100 is described below.
120t coal gas of converter is entered to the heat exchanger 2a of waste heat boiler through high-temperature pipe, coal gas of converter passes through high-temperature flue gas pipe
The heat exchanger 2a of input waste heat boiler carrys out heating boiler 2 to produce vapor, and the coal gas of converter after heat exchange and vapor are passed through
Pipeline input pyrolytic conversion stove 3 is heated, and part CO is changed, 120t coal gas of converter amounts 26400Nm3/ h (gas compositions
As shown in table 1), steam vapour amount 8019kg/h is added, coal gas of converter composition is converted, the mixed gas feeding scrubbing tower 4 after conversion
Washing, the mixed gas after washing carries out the carbonization treatment of carbon dioxide removal by pipeline to decarbonizing tower 5, and decarburization is former
Reason：CO2Mixed gas after+alkali lye=carbonic acid saline solution, carbonization treatment removes nitrogen with the physical method of cooling condensation, and residue is main
Want composition CO+H2, remaining is a small amount of nitrogen, CO2、H2O reducing gas 18480Nm3/ h, the main component of reducing gas and contains
Amount is shown in Table 2, and the reducing gas after conversion, carbonization treatment is heated to by inputting heating furnace 7 after compressor compresses, oil removal treatment
800 DEG C -950 DEG C, send into the reducing iron ore of gas base directly reducing device 8 or iron ore pellets.1tDRI (reduced iron) needs fresh
Gas flow 686.63Nm3/ t, combustion gas coal gas of converter 151.08Nm3/ t, the coal gas of converter as fuel is without processing.Produce per year
The integrated iron and steel works of 8000000 tons of steel can form a complete production network 800,000 tDRI.
The coal gas of converter main component of table 1 and content
| Composition | CO | CO2 | N2 |
| Content, % | 63 | 22 | 15 |
The reducing gas main component of table 2 and content
| Composition | CO | CO2 | H2 | N2 | CnHm | H2o |
| Content, % | 34.66 | 5.00 | 55.44 | 2.08 | 0.21 | 2.62 |
Another specific embodiment that coal gas of converter according to embodiments of the present invention utilizes system 100 is described below.
120t coal gas of converter is entered to the heat exchanger 2a of waste heat boiler through high-temperature pipe, coal gas of converter passes through high-temperature flue gas pipe
The heat exchanger 2a of input waste heat boiler carrys out heating boiler 2 to produce vapor, and the coal gas of converter after heat exchange and vapor are passed through
Pipeline input pyrolytic conversion stove 3 is heated, and part CO is changed, 120t coal gas of converter amounts 26400Nm3/ h (gas compositions
As shown in table 1), steam vapour amount 10935kg/h is added, coal gas of converter composition is converted, the mixed gas feeding scrubbing tower 4 after conversion
Washing, the mixed gas after washing carries out the carbonization treatment of carbon dioxide removal by pipeline to decarbonizing tower 5, and decarburization is former
Reason：CO2Mixed gas after+alkali lye=carbonic acid saline solution, carbonization treatment removes nitrogen with the physical method of cooling condensation, and residue is main
Want composition CO+H2, remaining is a small amount of nitrogen, CO2、H2O reducing gas 18480Nm3/ h, the main component of reducing gas and contains
Amount is shown in Table 3, and the reducing gas after conversion, carbonization treatment is heated to by inputting heating furnace 7 after compressor compresses, oil removal treatment
800 DEG C -1100 DEG C, send into the reducing iron ore of gas base directly reducing device 8 or iron ore pellets.1tDRI needs fresh gas flow
693.01Nm3/ t, combustion gas coal gas of converter 151.08Nm3/ t, the coal gas of converter as fuel is without processing.Produce 8000000 tons per year
The integrated iron and steel works of steel can form a complete production network 800,000 tDRI.
The reducing gas main component of table 3 and content
| Composition | CO | CO2 | H2 | N2 | CnHm | H2o |
| Content, % | 34.66 | 5.00 | 55.44 | 2.08 | 0.21 | 2.62 |
In summary, coal gas of converter according to embodiments of the present invention utilizes system 100, can effectively utilize coal gas of converter
Sensible heat, and realize the coupling of pneumatic steelmaking and gas base directly reducing device 8, both can cost-effectively utilize coal gas of converter,
The investment of gas base directly reducing device 8 can be reduced again, reduce the production cost of DRI.
The invention also discloses a kind of coal gas of converter using any of the above-described kind of embodiment coal gas of converter is utilized using system
Method.
As shown in Fig. 2 the method for utilization coal gas of converter according to embodiments of the present invention comprises the following steps：Gas conversion,
Carbonization treatment, nitrogen separation, reducing iron ore.
Wherein, step gas conversion includes reacting coal gas of converter and vapor, the main component of coal gas of converter is CO,
CO2And N2, the CO and H in coal gas of converter in high temperature environments2O reactions obtain CO2And H2, chemical equation is CO+H2O=CO2
+H2, i.e. the CO of part is by H2O reduction obtains H2。
Step carbonization treatment includes removing the CO in reacted mixed gas2, such as mixed gas can be passed into
In alkaline solution, decarburization principle：CO2+ alkaline solution=carbonic acid saline solution.
Step nitrogen separation includes the nitrogen in separation residual gas, to obtain including CO and H2Reducing gas, now
The main component of reducing gas is CO and H2, wherein nitrogen can be isolated using the physics mode of cooling condensation.
Step reducing iron ore includes using reducing gas reducing iron ore or iron ore pellets, such as can lead to reducing gas
Enter into gas base directly reducing device.
Coal gas of converter according to embodiments of the present invention utilizes system 100, and coal gas of converter is passed through into conversion, decarburization, denitrification work
Be used for gas base directly reducing after skill, realize the coupling that pneumatic steelmaking and gas base directly reducing produce reduced iron, both can economy have
Coal gas of converter is utilized to effect, the production cost of DRI can be reduced again.
The method of utilization coal gas of converter in accordance with a preferred embodiment of the present invention, as shown in Fig. 2 in step gas conversion
Before, then the heat exchanger that coal gas of converter is inputted into waste heat boiler will carry out the coal gas of converter after UTILIZATION OF VESIDUAL HEAT IN to produce vapor
Reacted with vapor.The sensible heat of coal gas of converter is so taken full advantage of, the efficiency using the method for coal gas of converter is higher.
The method of utilization coal gas of converter in accordance with a preferred embodiment of the present invention, as shown in Fig. 2 in step gas conversion
Also include step between step carbonization treatment：Mixed gas after washing reaction, that is to say, that after step gas conversion,
Mixed gas is washed, the impurity such as dust in gas after removal conversion prevents from polluting follow-up equipment, after washing
Gas carries out carbonization treatment again.
The method of utilization coal gas of converter in accordance with a preferred embodiment of the present invention, as shown in Fig. 2 in step reduction of iron ore
Also include step before stone：Heat reducing gas, reducing gas is heated to 800 DEG C -1100 DEG C, such as can be by reducing gas
800 DEG C -950 DEG C are heated to, to prevent reducing gas from influenceing the temperature of ironmaking equipment.Further step heating reducing gas it
It is preceding also to include step：Reducing gas is compressed, and carries out deoiling treatment, prevents greasy dirt from influenceing reduction reaction to strengthen reduction efficiency.
According to the method for the utilization coal gas of converter of a specific embodiment of the invention, as shown in Fig. 2 comprising the following steps：
Coal gas of converter is inputted the heat exchanger of waste heat boiler to produce vapor；Gas conversion, coal gas of converter and vapor are reacted；Wash
Wash reacted mixed gas；Carbonization treatment, removes the CO2 in reacted mixed gas；Nitrogen separation, separates residual gas
In nitrogen, to obtain the reducing gas for including CO and H2；The reducing gas is compressed, and carries out deoiling treatment；Heating reduction
Gas, 800 DEG C -1100 DEG C are heated to by the reducing gas；Reducing iron ore, with the reducing gas reducing iron ore or iron
Ore deposit pelletizing.
The method of the utilization coal gas of converter of the embodiment of the present invention can utilize system by the coal gas of converter of above-described embodiment
100 realize.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described
Structure, material or feature are contained at least one embodiment of the present invention or example.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can in an appropriate manner be combined in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of coal gas of converter utilizes system, it is characterised in that including：
Converter, boiler and reburner, the exhaust outlet of the converter are connected with the gas outlet of the boiler with the reburner；
Decarbonizing tower, the outlet of the reburner is connected with the import of the decarbonizing tower；
Nitrogen separation device, the outlet of the decarbonizing tower is connected with the import of the nitrogen separation device；
Gas base directly reducing device, the outlet of the nitrogen separation device and the air inlet phase of the gas base directly reducing device
Even.
2. coal gas of converter according to claim 1 utilizes system, it is characterised in that the boiler is waste heat boiler, and institute
The exhaust outlet for stating converter is connected by blast pipe with the heat exchanger of the waste heat boiler, and the coal gas of converter input after heat exchange is described
Reburner.
3. coal gas of converter according to claim 1 utilizes system, it is characterised in that also include：Scrubbing tower, the scrubbing tower
It is connected between the outlet of the reburner and the import of the decarbonizing tower.
4. coal gas of converter according to claim 1 utilizes system, it is characterised in that also include：Heating furnace, the heating furnace
It is connected between the nitrogen separation device and the gas base directly reducing device.
5. coal gas of converter according to claim 4 utilizes system, it is characterised in that also include：Compressor and degreaser,
The import of the compressor is connected with the outlet of the nitrogen separation device, outlet and the degreaser of the compressor
Import is connected, and the outlet of the degreaser is connected with the import of the heating furnace.
6. a kind of method that coal gas of converter using as any one of claim 1-5 utilizes coal gas of converter using system,
It is characterised in that it includes following steps：
Gas conversion, coal gas of converter and vapor are reacted；
Carbonization treatment, removes the CO in reacted mixed gas2；
Nitrogen in nitrogen separation, separation residual gas, to obtain including CO and H2Reducing gas；
Reducing iron ore, with the reducing gas reducing iron ore or iron ore pellets.
7. the method for utilization coal gas of converter according to claim 6, it is characterised in that before the step gas conversion,
The coal gas of converter is inputted the heat exchanger of waste heat boiler to produce the vapor.
8. the method for utilization coal gas of converter according to claim 6, it is characterised in that in the step gas conversion and institute
Stating also includes step between step carbonization treatment：Mixed gas after washing reaction.
9. the method for utilization coal gas of converter according to claim 6, it is characterised in that the step reducing iron ore it
It is preceding also to include step：Reducing gas is heated, the reducing gas is heated to 800 DEG C -1100 DEG C.
10. the method for utilization coal gas of converter according to claim 9, it is characterised in that add thermal reduction gas in the step
Also include step before body：The reducing gas is compressed, and carries out deoiling treatment.
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| CN201710179439.9A CN106995864A (en) | 2017-03-23 | 2017-03-23 | Coal gas of converter utilizes system and the method for utilizing coal gas of converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109880961A (en) * | 2019-03-26 | 2019-06-14 | 东北大学 | Converter gas processing and the composite system and method for restoring full vanadium titanium globe |
| CN109943678A (en) * | 2019-05-13 | 2019-06-28 | 重庆工商大学 | A kind of direct-reduction technique using coal gas of converter production sponge iron |
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