CN108486304B - A kind of coal gasification heating gas is directly used in the device and method of gas-based shaft kiln production direct reduced iron - Google Patents
A kind of coal gasification heating gas is directly used in the device and method of gas-based shaft kiln production direct reduced iron Download PDFInfo
- Publication number
- CN108486304B CN108486304B CN201810368611.XA CN201810368611A CN108486304B CN 108486304 B CN108486304 B CN 108486304B CN 201810368611 A CN201810368611 A CN 201810368611A CN 108486304 B CN108486304 B CN 108486304B
- Authority
- CN
- China
- Prior art keywords
- gas
- furnace
- coal
- modification
- directly used
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
The present invention relates to the device and method that a kind of coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron comprising: synthesis gas, H are prepared using fine coal, vapor and oxygen2/ CO is 1.2-1.7, and temperature is no more than 850 DEG C after the shaft furnace stock gas of heat-exchange dedusting is added；Dedusting；Modification removing CO is carried out by modification furnace furnace charge at a temperature of 1100 DEG C -1250 DEG C2And H2S, the temperature for modifying coal gas is 900 DEG C -1100 DEG C, H2/ CO is 1.2-1.7；The vertical furnace top coal for being mixed into heat-exchange dedusting is so incensed that the synthesis to 850 DEG C -900 DEG C modifies coal gas；It is passed through after synthesis modification coal gas dust removal and is provided with the shaft furnace of iron ore and obtains DRI.Present invention combination Chinese energy feature, coal gasification is combined with gas-based shaft kiln directly reduced technique, gas base directly reducing method is overcome to the dependence of natural gas, avoids the very long complicated procedures of forming that could be used for shaft furnace production direct reduction iron making after coal gasification hot coal air cooling-transformation-purification-reheating；Have many advantages, such as that short process, low energy consumption, also Primordial Qi ingredient is excellent, low pollution.
Description
Technical field
The present invention relates to shaft kiln directly reduced field of metallurgy, it is perpendicular that especially a kind of coal gasification heating gas is directly used in gas base
The method of furnace production direct reduced iron.
The invention further relates to the equipment that a kind of coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron.
Background technique
Direct reduced iron is to soften temperature at iron ore (or iron content agglomerate) using gas, liquid fuel or mill coal as the energy
It is restored to obtain the method for metallic iron below degree.Its product is in porous low-density sponge shape structure, referred to as DRI (Direct
Reduced Iron- direct reduced iron) or sponge iron.Direct reduced iron in terms of have excellent performance.With
World steel industry rapid development and international community to the pay attention to day by day of environmental protection, iron ore, coke, high-quality steel scrap money
Increasingly reducing for source and sharp rising for the prices such as natural gas, Direct Reduction Technology is rapidly developed all over the world.
Natural Gas Resources in China compares shortage, and explored gas reserves is concentrated mainly on the relatively backward western part of industry
And the west and south, and city gas must preferentially supply resident living use.But the coal resources in China are very rich, and point
Cloth is relatively uniform；Meanwhile China's iron ore deposit also very abundant, according to china natural resources situation, Development of Coal base or coal gas are also
Original process are than advantageous.
The coal-based DR process of China's maturation only has rotary kiln process at present, but the investment of rotary kiln process is high, effect
Rate is low to make most of producers hang back.Traditional coal gas reducing process, the hot raw gas that coal gasifier generates need to be through cooling down
Cooling, water-gas shift, will also set individual chemical industry cleaning shop, as PSA (pressure-variable adsorption) removes CO2And H2S uses alkaline cleaner
Remove CO2, rewetting elution H2S can just be passed through gas-based shaft kiln after subsequent heated furnace heating.Therefore carry out coal gas-directly also
Former technology, the direct-reduction technique for basing oneself upon Chinese Resources characteristic to development have realistic meaning very much.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of short process, low energy consumption, low pollution adaptation China
The coal gasification heating gas of energy national conditions is directly used in the device and method of gas-based shaft kiln production direct reduced iron.
(2) technical solution
In order to achieve the above object, the present invention provides a kind of coal gasification heating gas and is directly used in gas-based shaft kiln production directly also
The method of former iron comprising following steps: synthesis gas, the H of the synthesis gas are prepared using fine coal, vapor and oxygen2/ CO is
1.2-1.7；Heat exchange cooling and purifying and dedusting are carried out to the stock gas of shaft furnace discharge, obtain the vertical furnace top coal of heat-exchange dedusting
Gas；The shaft furnace stock gas of heat-exchange dedusting is mixed into synthesis gas, obtains hot raw gas, the hot raw gas temperature is not more than 850
℃；The hot raw gas is dusted, raw gas is purified, the purification raw gas dustiness is not more than 10g/m3；?
At a temperature of 1100 DEG C -1250 DEG C, purification raw gas is modified, the modification removes CO by modification furnace furnace charge2And H2S changes
Modification coal gas is obtained after matter, the temperature of the modification coal gas is 900 DEG C -1100 DEG C, the H in the modification coal gas2/ CO is 1.2-
1.7；It is mixed into the shaft furnace stock gas of heat-exchange dedusting into modification coal gas, obtains synthesis modification coal gas, coal is modified to the synthesis
Gas is dusted, and is purified synthesis gas, and the temperature of the decontaminating syngas is 850 DEG C -900 DEG C；By the decontaminating syngas
It is passed through the shaft furnace for being provided with iron ore and/or acid pellet, obtains DRI and shaft furnace stock gas.
Preferably, the dolomite dust of 8-12%wt is mixed in the fine coal.
Further, operating pressure when preparing synthesis gas is 0.3MPa-0.6MPa；The hot raw gas temperature is 800
℃-850℃。
Preferably, gravitational dust collection is first carried out to the hot raw gas, carries out cyclone dust removal afterwards；What gravitational dust collection obtained takes out of
Object is added back in the fine coal, and the dust that cyclone dust removal obtains is for recycling waste heat.
Preferably, the modification furnace furnace charge includes the coke of 65-85%wt, the dolomite and 5-10%wt of 10-25%wt
Converter slag, the modification furnace furnace size be not less than 50mm.
Preferably, spent charge is obtained after the modification furnace furnace charge reaction, is recycled after the spent charge is cooling, screening
Furnace charge and phosphorus bearing slag, the recycling furnace charge are added back to the modification furnace furnace charge, the self-contained waste heat of the phosphorus bearing slag and/
Or the heat that its burning generates is for making vapor.
Preferably, including the working space modified at two, at one to the purification raw gas modification when, another place
1250 DEG C are heated to using the mode that modification furnace stock gas mixes oxygen combustion；Working space replaces to the purification at two
Raw gas is modified.
Preferably, operating pressure is 0.1MPa-0.6MPa in the shaft furnace.
Preferably, flammable gas extra in recovery process, the waste heat carried using its own and/or burning are generated
Heat make the vapor.
It is special the present invention also provides the equipment that a kind of coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron
Sign is, above-mentioned coal gasification heating gas is used to be directly used in the method ironmaking of gas-based shaft kiln production direct reduced iron.
Coal gasifier is sequentially connected temperature adjustment cooling unit, gravitational precipitator unit, cyclone unit, two groups side by side
Reforming unit, temperature adjustment cooling unit, cyclone unit, shaft furnace unit, stock gas heat exchange unit, stock gas purification remove
Dirt unit；Reforming unit is sequentially connected cinder tank, vibrating screen, waste heat boiler, Steam drum, coal gasifier；Reforming unit according to
Unit, presser unit are washed in secondary connection dedusting；Cyclone unit connects waste heat boiler.
(3) beneficial effect
The present invention provides a kind of method that coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron, in conjunction in
Coal gasification is combined with gas base directly reducing shaft furnace process, overcomes current gas base directly reducing method coal gas net by state's energy feature
Change, heated by gas techniqueflow is complicated, invests the limitations such as huge, formation large-scale production；Overcome gas base directly reducing method
To the dependence of natural gas, avoid that could to be used for shaft furnace production after coal gasification hot coal air cooling-transformation-purification-reheating straight
Connect the very long complicated procedures of forming of reduction iron production；And shaft furnace stock gas is recycled, whole system waste heat is recycled, convection current
Cheng Wendu control, external energy requirements needed for reducing whole flow process have short process, low energy consumption, also Primordial Qi ingredient excellent, low
The advantages that pollution, low cost.
It is mixed with dolomite in fine coal, part element sulphur is just removed when preparing synthesis gas, mitigates the pressure of subsequent step
Power reduces pollution.
Operating pressure when synthesis gas is that 0.3MPa-0.6MPa is conducive to rapid reaction, stabilization, and the component ratio of generation closes
It is suitable.800 DEG C -850 DEG C of hot raw gas temperature alleviates the heated pressure again of process below, be conducive to reaction faster into
Row, and reduce energy consumption.
Two step dedustings are set, and the effluent respectively walked is utilized respectively, good economy performance, reduces energy consumption, while dedusting is more thorough.
Coke is for removing CO2, dolomite is for removing H2S.Modification also heated gas, mention other than imurity-removal
Rise gas temperature.And the component ratio in modification coal gas is readjusted, has been allowed to be more suitable for the use of reduction shaft furnace iron.Spent charge
It is separately recovered after screening, good economy performance, reduces energy consumption.
The working space of two modifications works alternatively, and can preferably maintain dynamic temperature, while can continuously provide
Modify coal gas.Furnace size is bigger than normal, helps to reduce the furnace charge that air-flow carries away.
In shaft furnace under the operating pressure of 0.1MPa-0.6MPa, the reaction of reduction iron production is more stable, more efficient, is suitble to this
The gas componant of the also Primordial Qi of invention preparation.
Vapor is prepared using the fuel gas that each process can generate, reduces energy consumption, it is convenient to prepare vapor
Fast.
The equipment that coal gasification heating gas provided by the invention is directly used in gas-based shaft kiln production direct reduced iron, based on preparation
Method is equipped with each device, compact-sized, and arrangement is coherent to be conducive to various waste recoveries again simultaneously, and long service life is invested small.
Detailed description of the invention
Fig. 1 is that a kind of process structure for the equipment that coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron shows
It is intended to.
[description of symbols]
1: fluidized bed coal gasifier；2: gravitational precipitator；3a: the first cyclone separator；3b: the second cyclone separator；4a:
First modification furnace；4b: the second modification furnace；5: shaft furnace；6: heat exchanger；7: purifying dust-removing device；8: the first force (forcing) pumps；9: waste heat pot
Furnace；10: cinder tank；11: vibrating screen；12: dedusting water scrubber；13: the second force (forcing) pumps；14: Steam drum；15a: the first switching
Valve；15b: the second switching valve；16a: third switching valve；16b: the four switching valve.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Embodiment 1
As shown in Figure 1, including fluidized bed coal gasifier 1, it is inside placed with fine coal, and be passed through oxygen and vapor, passed through
The ratio for adjusting oxygen and vapor, so that the H of the synthesis gas of output2It is 1.2-1.7 with CO molar ratio.It can be mixed in coal dust
Enter the dolomite dust of 8-12%wt, preferably 10%wt, for reducing the sulfur content in synthesis gas.Fluidized bed coal gasifier
Operating pressure is 0.3 MPa-0.6MPa in 1, and the synthesis gas temperature of generation is higher up to 980 DEG C, and the clinker of generation can be regarded
The raw material in cement plant.
Synthesis gas is mixed with the shaft furnace stock gas that heat-exchange dedusting is crossed, the shaft furnace stock gas of the lower heat-exchange dedusting of temperature
By synthesis gas Quench to 800 DEG C -850 DEG C, actually it is ok not higher than 850 DEG C.The gas being mixed to get is known as hot raw gas.
Hot raw gas is passed through in gravitational precipitator 2, the big grain carry-over that air-flow carries is isolated by gravitational precipitator 2
Come, can directly transport back and be continued to use in fluidized bed coal gasifier 1.Hot raw gas after gravitational dust collection is passed into the first whirlwind point
From in device 3a, it is purified raw gas.Raw gas is purified with CO and H2For main component, CO and H2Volume and account for the 72- of gas
76%, dustiness is reduced to 10g/m3Below.
The self-contained heat of dust that first cyclone separator 3a is isolated contains flammable fine coal simultaneously, dust is transported
Defeated to be mixed into air burning into preboiler 9, the amount of heat of generation imports Steam drum 14, for generating fluidized bed coal
The vapor that gasification furnace 1 uses.
Two modification furnaces are provided in Fig. 1.It is provided with the furnace charge that granularity is not less than 50mm in modification furnace, modifies furnace furnace charge packet
Include the coke of 65-85%wt, the dolomite of 10-25%wt and the converter slag of 5-10%wt.The furnace temperature of modification furnace is maintained at
1100 DEG C -1250 DEG C, the interior working space for forming modification of furnace.The mode that the burning of coal gas oxygen can be used keeps modification furnace furnace
Temperature.
Pass through the coke and CO of red heat2The gasification reaction that carbon occurs removes CO2, by dolomite decomposition generate CaO with
H2Sulphur in S reaction removing purification raw gas obtains modification coal gas.Modify gas temperature be 900 DEG C -1100 DEG C, wherein mainly at
Part is CO and H2, the two volume and up to 92% or more, H2/ CO is 1.2-1.7, CH4Content is lower than 1%vol.
The spent charge that modification fire grate goes out first is transported to Quench in cinder tank 10, then is transported to the screening of vibrating screen 11, bulk
It is continued to use in the furnace charge that recycling furnace charge is added back in modification furnace, phosphorus bearing slag is transported to waste heat boiler 9, steams for making water
Gas.
Modification furnace stock gas removes the dust contained by dedusting water scrubber 12, pressurizes using the second force (forcing) pump 13,
Modification furnace is returned to, as the fuel gas of conducting self-heating, ingredient is mainly CO, further includes a small amount of H2。
The meaning that two modification furnaces are arranged is, when the first modification furnace 4a work, is passed through oxygen in the second modification furnace 4b
Gas, is passed through modification furnace top gas and/or fuel gas, and combustion heating second modifies furnace 4b temperature to 1250 DEG C.It is then shut off modification
Combustion oxygen is closed in the import of furnace stock gas and/or fuel gas, while being also switched off modification furnace stock gas outlet valve, then will
It purifies raw gas and introduces the second modification furnace 4b, start to remove CO2And H2The upgrading processes of S.
The temperature of the second modification furnace 4b can be declined in upgrading processes.The lower first modification furnace 4a of temperature stops at this time
Upgrading processes, are subsequently passed modification furnace stock gas and/or fuel gas and combustion oxygen is begun to warm up, until the first modification furnace 4a
Interior temperature rises to 1250 DEG C.
The modification furnace stock gas of two modification furnaces all passes through dedusting water scrubber 12 and the second force (forcing) pump 13, then passes through third
Switching valve 16a, controlled flow back into modify in furnace.Oxygen used in two modification furnaces can also be conveyed by a general pipeline
Come, is then diverted in two modification furnaces by the 4th switching valve 16b.
First cyclone separator 3a is communicated to the first switching valve 15a, and purification raw gas is distinguished defeated by the first switching valve 15a
It is sent in two modification furnaces.The modification coal gas that two modification fire grates go out converges through the second switching valve 15b, is subsequently passed heat-exchange dedusting
Shaft furnace stock gas, the temperature of obtained synthesis modification coal gas be reduced to 900 DEG C hereinafter, preferred control to 850 DEG C -900
DEG C, after the second cyclone separator 3b dedusting, it is purified synthesis gas, the temperature of decontaminating syngas is 850 DEG C -900 DEG C.
Decontaminating syngas is transported in shaft furnace 5.It is provided with iron ore and/or acid pellet in shaft furnace 5, is obtained by reaction
DRI and shaft furnace stock gas.Shaft furnace stock gas can drop to 50 DEG C or less by the heat exchange cooling of heat exchanger 6, temperature；Using
Purifying dust-removing device 7 and the first force (forcing) pump 8 obtain the shaft furnace stock gas of heat-exchange dedusting, use back to preamble.
Embodiment 2
A kind of iron smelting method prepares synthesis gas, synthesis gas using fine coal, vapor and oxygen under 0.3MPa operating pressure
H2/ CO is 1.2.The shaft furnace stock gas of 50 DEG C of heat-exchange dedusting is passed through synthesis gas, the heat that the two is mixed to get 850 DEG C is thick
Coal gas.Hot raw gas is dusted, dustiness 9g/m is obtained3Purification raw gas.
Purification raw gas is passed through modification working space, the temperature of working space is 1200 DEG C, and working space is provided with grain
The modification furnace furnace charge for spending 50mm, including the coke of 65%wt, the dolomite of 25%wt and the converter slag of 10%wt.?
It modifies and removes CO in space2And H2Obtained after S restructuring coal gas, 1100 DEG C of temperature, H2/ CO is 1.2.
The shaft furnace stock gas of 50 DEG C of heat-exchange dedusting is passed through modification coal gas, obtains synthesis modification coal gas.Synthesis is changed
Matter coal gas carries out centrifugal dust-removing.It is purified synthesis gas, the temperature of decontaminating syngas is 900 DEG C.Utilize decontaminating syngas and iron
Ore manufactures DRI, and obtains shaft furnace stock gas, operating pressure 0.1MPa.
Embodiment 3
A kind of iron smelting method is operated in 0.5MPa using vapor, oxygen and fine coal containing 12%wt dolomite dust and is pressed
Synthesis gas is prepared under power, by adjusting the ratio of vapor and oxygen, the H of synthesis gas2/ CO is 1.7.By 30 DEG C of heat-exchange dedusting
Shaft furnace stock gas be passed through synthesis gas, the two is mixed to get 800 DEG C of hot raw gas.Gravity is first carried out to hot raw gas to remove
Dirt, the carry-over that gravitational dust collection obtains are added back in fine coal；After carry out cyclone dust removal, the dust that cyclone dust removal obtains is for recycling
Waste heat.Obtain dustiness 3g/m3Purification raw gas.
Purification raw gas is passed through modification working space, the temperature of working space is 1100 DEG C, and working space is provided with grain
The modification furnace furnace charge for spending 100mm, including the coke of 85%wt, the dolomite of 10%wt and the converter slag of 5%wt.?
It modifies and removes CO in space2And H2Obtained after S restructuring coal gas, 900 DEG C of temperature, H2/ CO is 1.7.
The shaft furnace stock gas of 30 DEG C of heat-exchange dedusting is passed through modification coal gas, obtains synthesis modification coal gas.Synthesis is changed
Matter coal gas carries out centrifugal dust-removing.It is purified synthesis gas, the temperature of decontaminating syngas is 850 DEG C.Utilize decontaminating syngas and oxygen
Pellet manufactures DRI, and obtains shaft furnace stock gas, operating pressure 0.6MPa.
Upper embodiment is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and this specification should not be construed as to limit of the invention
System.
Claims (10)
1. a kind of method that coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron, which is characterized in that it includes
Following steps:
Synthesis gas, the H of the synthesis gas are prepared using fine coal, vapor and oxygen2/ CO is 1.2-1.7；
Heat exchange cooling and purifying and dedusting are carried out to the stock gas of shaft furnace discharge, obtain the shaft furnace stock gas of heat-exchange dedusting；
The shaft furnace stock gas of heat-exchange dedusting is mixed into synthesis gas, obtains hot raw gas, the hot raw gas temperature is not more than 850
℃；
The hot raw gas is dusted, raw gas is purified, the purification raw gas dustiness is not more than 10g/m3；
Purification raw gas is passed through modification furnace to modify, removes CO by modification furnace furnace charge2And H2S obtains modification coal after modification
Gas, and make 900 DEG C -1100 DEG C of temperature for modifying coal gas, the H in the modification coal gas2/ CO is 1.2-1.7；Wherein,
The modification furnace furnace charge includes the coke of 65-85%wt, the dolomite of 10-25%wt and the converter slag of 5-10%wt, modification
The furnace temperature of furnace is maintained at 1100 DEG C -1250 DEG C；
It is mixed into the shaft furnace stock gas of heat-exchange dedusting into modification coal gas, obtains synthesis modification coal gas, coal is modified to the synthesis
Gas is dusted, and is purified synthesis gas, and the temperature of the decontaminating syngas is 850 DEG C -900 DEG C；
The decontaminating syngas is passed through to the shaft furnace for being provided with iron ore and/or acid pellet, obtains DRI and vertical furnace top coal
Gas.
2. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: the dolomite dust of 8-12%wt is mixed in the fine coal.
3. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: operating pressure when preparing synthesis gas is 0.3MPa-0.6MPa；
The hot raw gas temperature is 800 DEG C -850 DEG C.
4. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: first carrying out gravitational dust collection to the hot raw gas, carries out cyclone dust removal afterwards；
The carry-over that gravitational dust collection obtains is added back in the fine coal, and the dust that cyclone dust removal obtains is for recycling waste heat.
5. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: the modification furnace furnace size is not less than 50mm.
6. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: obtaining spent charge after the modification furnace furnace charge reaction, recycling furnace charge is obtained after the spent charge is cooling, screening and is contained
Carbon clinker, the recycling furnace charge are added back to the modification furnace furnace charge, the self-contained waste heat of the phosphorus bearing slag and/or its burning
The heat of generation is for making vapor.
7. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: including the working space modified at two, when modifying to the purification raw gas at one, another place is using modifying
The mode that furnace stock gas mixes oxygen combustion is heated to 1250 DEG C；
Working space replaces to modify the purification raw gas at two.
8. the method that coal gasification heating gas as described in claim 1 is directly used in gas-based shaft kiln production direct reduced iron, special
Sign is: operating pressure is 0.1MPa-0.6MPa in the shaft furnace.
9. the side that coal gasification heating gas as described in any of the claims 1 to 8 is directly used in gas-based shaft kiln production direct reduced iron
Method, it is characterised in that: what extra flammable gas in recovery process, the waste heat carried using its own and/or burning were generated
Heat makes the vapor.
10. the equipment that a kind of coal gasification heating gas is directly used in gas-based shaft kiln production direct reduced iron, which is characterized in that it is used
Coal gasification heating gas as described in any one of claim 1 to 9 is directly used in the method ironmaking of gas-based shaft kiln production direct reduced iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810368611.XA CN108486304B (en) | 2018-04-23 | 2018-04-23 | A kind of coal gasification heating gas is directly used in the device and method of gas-based shaft kiln production direct reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810368611.XA CN108486304B (en) | 2018-04-23 | 2018-04-23 | A kind of coal gasification heating gas is directly used in the device and method of gas-based shaft kiln production direct reduced iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108486304A CN108486304A (en) | 2018-09-04 |
| CN108486304B true CN108486304B (en) | 2019-10-11 |
Family
ID=63312856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810368611.XA Active CN108486304B (en) | 2018-04-23 | 2018-04-23 | A kind of coal gasification heating gas is directly used in the device and method of gas-based shaft kiln production direct reduced iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108486304B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458226A (en) * | 2020-11-04 | 2021-03-09 | 中冶赛迪技术研究中心有限公司 | Method for controlling sulfur content of direct reduced iron |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994678A (en) * | 2012-11-21 | 2013-03-27 | 北京神雾环境能源科技集团股份有限公司 | Method and system for pulverized coal gasification for gas generation and direct reduction metallurgy of gas-based shaft furnace |
| CN103276131A (en) * | 2013-05-23 | 2013-09-04 | 苏亚杰 | Comprehensive utilization process method of waste heat, residual pressure and residual gas of high-temperature raw gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853538A (en) * | 1973-07-20 | 1974-12-10 | Steel Corp | Use of reducing gas by coal gasification for direct iron ore reduction |
-
2018
- 2018-04-23 CN CN201810368611.XA patent/CN108486304B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994678A (en) * | 2012-11-21 | 2013-03-27 | 北京神雾环境能源科技集团股份有限公司 | Method and system for pulverized coal gasification for gas generation and direct reduction metallurgy of gas-based shaft furnace |
| CN103276131A (en) * | 2013-05-23 | 2013-09-04 | 苏亚杰 | Comprehensive utilization process method of waste heat, residual pressure and residual gas of high-temperature raw gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108486304A (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102206723B (en) | Air-base direct reduction iron-making method for reducing iron concentrate powder by self-reforming of gas rich in methane | |
| CN104870659B (en) | Molten iron manufacturing apparatus and molten iron manufacturing method | |
| CN104803819B (en) | A kind of method and system utilizing fine coal preparing ethylene | |
| CN107337179A (en) | Preparation system and method of reducing gas of gas-based shaft furnace | |
| CN101597663B (en) | Energy recovery system for preparing sponge iron by gasification of high-pressure pulverized coal and method thereof | |
| CN107151721A (en) | A kind of Lurgi gasifying gas produces the system and method for DRI through dual turn over metaplasia | |
| CN107118807A (en) | System and method for preparing reducing gas by lignite double-bed gasification | |
| CN108486304B (en) | A kind of coal gasification heating gas is directly used in the device and method of gas-based shaft kiln production direct reduced iron | |
| CN207130292U (en) | A kind of system of shaft furnace production DRI | |
| CN101463404B (en) | Production process for producing spongy iron by dry coal powder gasification in high furnace | |
| CN107299176A (en) | A kind of system and method for shaft furnace production DRI | |
| CN205669012U (en) | Device for preparing reducing gas by lignite gasification poly-generation | |
| CN103952184A (en) | Method and system for preparing reducing gas used for shaft furnace through catalytic coal gasification | |
| CN107641528B (en) | Energy-saving water-gas/steam co-production gasification process | |
| CN113373274B (en) | Coal gas treatment process for full hydrogen shaft furnace | |
| CN107164594A (en) | A kind of BGL gasifying gas produces the system and method for DRI through dual turn over metaplasia | |
| CN213772106U (en) | Gas-based shaft furnace reducing gas preparation system | |
| CN207121422U (en) | Preparation system of gas-based shaft furnace reducing gas | |
| CN204981692U (en) | System for fine coal preparation ethylene | |
| CN205328629U (en) | Device of preparation carbide | |
| CN107151720A (en) | A kind of Lurgi gasifying gas converts the system and method for producing DRI through steam | |
| CN107354258A (en) | A kind of BGL gasifying gas converts the system and method for production DRI through steam | |
| CN203683085U (en) | Device for preparing synthetic gas by performing methane reforming through blast furnace slag sensible heat | |
| CN109437604B (en) | Method for realizing sensible heat recovery and tail gas utilization of burnt lime by utilizing methane reforming | |
| CN108485725B (en) | Process for modifying raw gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |