CN108191384A - The four nozzle gasification furnace plug bricks and preparation method of a kind of functionally gradient - Google Patents
The four nozzle gasification furnace plug bricks and preparation method of a kind of functionally gradient Download PDFInfo
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- CN108191384A CN108191384A CN201810216351.4A CN201810216351A CN108191384A CN 108191384 A CN108191384 A CN 108191384A CN 201810216351 A CN201810216351 A CN 201810216351A CN 108191384 A CN108191384 A CN 108191384A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The present invention relates to a kind of preparation method of plug brick ,=it is related to the four nozzle gasification furnace plug bricks and preparation method of a kind of functionally gradient.A kind of four nozzle gasification furnace plug bricks of disclosed functionally gradient have plug；Plug is circular cone stage body be prepared by high-chromium material, tapered diameter from top to bottom；The upper end of plug has the plug link block to play connection function；The plug link block is by the circular cone stage body of the upward flaring diameter in upper end of plug；The upper end of the plug link block has the tail portion sprue to play plugging action；Tail portion sprue is integrally formed with plug link block by low chromium material；The center of plug brick is inserted with heat-resisting reinforcing bar；High-chromium material is Cr2O3Content is 70~93% material；Low chromium material is Cr2O3Content is 2~15% material.Present invention reduces the financial cost of plug brick, reduce the quality of plug brick, and reduce the working strength of plug brick high temperature plug during gasifier operation.
Description
Technical field
The present invention relates to a kind of preparation method of plug brick, four nozzle gasification furnaces of in particular to a kind of functionally gradient
Plug brick and preparation method.
Background technology
Rich coal lacks the oil-poor fundamental realities of the country of gas and determines the principal status of public economy that coal chemical industry develops in China.Development efficiently, cleaning,
Environmentally friendly, energy-efficient industrial chain is inevitable requirement of the present and the future to coal chemical industry.Four nozzle gasification furnaces are covered from December, 2004 head
Since putting into commercial Application, constantly tackle key problems, improved by research staff and using unit technical staff, technical merit constantly carries
It rises, device is stable.Compared with similar technique, which shows prominent technical advantage, puts into industry park plan, every
Index reaches the leading level in the world of current large-scale Coal Gasification Technology.
Four nozzle gasification furnaces are provided with the provisional preheating burner in a top and the fuel of four, stack shell top opposed type is burnt
Mouth.It needs to be put into preheating burner from top fire door before driving and burner hearth is heated, until pulling out after being heated to feed temperature
Go out, then clogged fire door with plug brick, after closing, the fuel nozzle for restarting four opposed types carries out the operation that feeds intake.Gasification
In stove operational process, plug brick and key brick are resisted the erosion of cinder and are washed away together.When gasification furnace shutdown maintenance, handle is needed
Plug brick is pulled out.In order to facilitate the plug of plug brick, there is provided heat-resisting reinforcing bars for plug brick tail portion to inlay shackle.Because shackle
It is carried out there are plug brick using cast method for prefabricating, then carries out the processing of certain temperature.
Because there is the presence for inlaying reinforcing bar, the volume for making plug is all larger, and the bulk density of high-chromium material is relatively large,
The dead weight of plug brick is larger.The plug of plug all carries out at high temperature, and the working strength of worker is too big.In addition, high chromium blocks up
Material used in head, chromium oxide is a kind of scarce resource, needs to use this material less as far as possible.
Invention content
The purpose of the present invention is to propose to the four nozzle gasification furnace plug bricks and preparation method of a kind of functionally gradient, make its basis
TRIZ40 basic principle-local quality principle, it is the characteristics of making full use of plug brick self structure, large volume is large-sized stifled
Plug brick of the head brick support with functionally gradient, so as to reduce the usage quantity of chromium oxide material, reduces the quality of plug brick, drop
The working strength that plug brick high temperature plugs during low gasifier operation.
The present invention is adopted the following technical scheme that complete above-mentioned purpose：
A kind of four nozzle gasification furnace plug bricks of functionally gradient, the plug brick have the plug to play anti-erosion；
The plug is circular cone stage body be prepared by high-chromium material, tapered diameter from top to bottom；The upper end of the plug has
To play the plug link block of connection function；The plug link block is by the frustum of a cone of the upward flaring diameter in upper end of plug
Body；The upper end of the plug link block has the tail portion sprue to play plugging action；The tail portion sprue is more than for diameter
The cylinder of plug link block maximum gauge；The center of the upper surface of the tail portion sprue has groove；The tail portion sprue
It is integrally formed with the plug link block by low chromium material；The integrally formed tail portion sprue and the plug link block
It is built by laying bricks or stones with plug and is formed as one plug brick；The center of the plug brick is inserted with heat-resisting reinforcing bar；The lower end of the heat-resisting reinforcing bar
In the plug, upper end is located in the groove；The heat-resisting reinforcing bar and the plug, plug link block with
And it is connected between the sprue of tail portion by heat-resisting spike-tooth；The high-chromium material is Cr2O3Content is 70~93% material；Described
Low chromium material is Cr2O3Content is 2~15% material.
The Cr2O3Content is the raw material composition of 70~93% materials and weight percent is：
The electric smelting of 5~0mm or sintering oxidation chromium aggregate 68~72%；Cr in aggregate2O3Content>86%；The electric smelting of 180~325 mesh
Or sintering oxidation chromium fine powder 12~20%；Cr in fine powder2O3Content>86%；1000 mesh active alphas-alumina powder 5~10%；325
Mesh aluminous cement 0.5~8%；Phosphate solution 0.5~8%；The water of also additional promising raw material gross weight 3~6%.
The Cr2O3The raw material for the material that content is 2~15% forms and weight percent is：The electric smelting or sintering of 5~0mm
Corundum aggregate 68~72%, Al in aggregate2O3Content 99%；The electric smelting of 180~325 mesh or alundum fine powder 3~18%, fine powder
Middle Al2O3Content 99%；The electric smelting of 180~325 mesh or sintering oxidation chromium fine powder, 2~17%；Cr in fine powder2O3Content>86%；
1000 mesh active alphas-alumina powder, 5~10%；325 mesh aluminous cements 0.5~8%；Phosphate solution 0.5~8%；It is also additional
The water of promising raw material gross weight 3~6%.
The heat-resisting reinforcing bar is inverted U.
A kind of preparation method of four nozzle gasification furnace plug bricks of functionally gradient, it is characterised in that：Plug brick embedded set falls U
The heat-resisting reinforcing bar of type, three layers of heat-resisting spike-tooth are welded on heat-resisting reinforcing bar, and every layer of heat-resisting spike-tooth is multiple；Heat-resisting reinforcing bar the lowermost is heat-resisting
Spike-tooth is embedded in plug, and the spike-tooth in the middle part of heat-resisting reinforcing bar is embedded in plug link block, and the heat-resisting spike-tooth on heat-resisting reinforcing bar top is embedded in
In the sprue of tail portion；The top of heat-resisting reinforcing bar is exposed in the groove of tail portion sprue, forms a shackle；During molding, first by Cr2O3
In the material injection mold of content 70~93%, being vibrated, slurry will cover the heat-resisting spike-tooth of the heat-resisting reinforcing bar bottom of inverted U,
Smooth slurry is subjected to grooving processing, reinjects Cr2O3The material of content 2~15% continues to vibrate, until prefabricated to mold system
Positioning is put；It is demoulded after material hardening, 120~150 DEG C are dried, 400~500 DEG C of heat treatments.
A kind of four nozzle gasification furnace plug bricks of functionally gradient proposed by the present invention, make full use of plug brick self structure
The large-sized plug brick support of large volume is had the plug brick of functionally gradient, so as to reduce making for chromium oxide material by feature
With quantity, the financial cost of plug brick is reduced, reduces the quality of plug brick, and reduces plug during gasifier operation
The working strength of brick high temperature plug.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
In figure：1st, plug, 2, plug link block, 3, heat-resisting reinforcing bar, 4, heat-resisting spike-tooth, 5, tail portion sprue.
Specific embodiment
The present invention is illustrated with reference to the drawings and specific embodiments；
As shown in Figure 1, a kind of four nozzle gasification furnace plug bricks of functionally gradient, the plug brick has to be made to play anti-erosion
Plug 1；The plug 1 is circular cone stage body be prepared by high-chromium material, tapered diameter from top to bottom；The plug
1 upper end has the plug link block 2 to play connection function；The plug link block 2 be by plug upper end upwards gradually
Expanding circular cone stage body；The upper end of the plug link block 2 has the tail portion sprue 3 to play plugging action；The tail portion
Sprue 3 is more than the cylinder of plug link block maximum gauge for diameter；The center of the upper surface of the tail portion sprue 3 has recessed
Slot；The tail portion sprue is integrally formed with the plug link block by low chromium material；The integrally formed tail portion sprue 3
It is built by laying bricks or stones with the plug link block 2 and plug 1 and is formed as one plug brick；The center of the plug brick is inserted with heat-resisting reinforcing bar
3；The lower end of the heat-resisting reinforcing bar 3 is located in the plug, and upper end is located in the groove；The heat-resisting reinforcing bar 3 with
It is connected between the plug, plug link block and tail portion sprue by heat-resisting spike-tooth 4；The high-chromium material is Cr2O3Contain
Measure the material for 70~93%；The low chromium material is Cr2O3Content is 2~15% material.
The Cr2O3Content is the raw material composition of 70~93% materials and weight percent is：
The electric smelting of 5~0mm or sintering oxidation chromium aggregate 68~72%；Cr in aggregate2O3Content>86%；The electric smelting of 180~325 mesh
Or sintering oxidation chromium fine powder 12~20%；Cr in fine powder2O3Content>86%；1000 mesh active alphas-alumina powder 5~10%；325
Mesh aluminous cement 0.5~8%；Phosphate solution 0.5~8%；The water of also additional promising raw material gross weight 3~6%.
The Cr2O3The raw material for the material that content is 2~15% forms and weight percent is：The electric smelting or sintering of 5~0mm
Corundum aggregate 68~72%, Al in aggregate2O3Content 99%；The electric smelting of 180~325 mesh or alundum fine powder 3~18%, fine powder
Middle Al2O3Content 99%；The electric smelting of 180~325 mesh or sintering oxidation chromium fine powder, 2~17%；Cr in fine powder2O3Content>86%；
1000 mesh active alphas-alumina powder, 5~10%；325 mesh aluminous cements 0.5~8%；Phosphate solution 0.5~8%；It is also additional
The water of promising raw material gross weight 3~6%.
The heat-resisting reinforcing bar is inverted U.
Embodiment one：
Prefabricated profiled plug brick is divided into the pyramid type plug head for playing the role of anti-erosion, plays the pyramid type plug of connection function
Middle part and the cylindrical type tail portion for playing plugging action.Pyramid type plug head is Cr2O3The material of content 90.5%, in pyramid type plug
Portion and the tail portion of cylindrical type are Cr2O3The material of content 8.1%.
A kind of Cr2O3The material of content 90.5%, consisting of（According to weight percent）：
The electric smelting chromic oxide aggregate of 5~0mm, 72%；Cr in aggregate2O3Content 99.5%.
The electric smelting chromium oxide fine powder of 180~325 mesh, 19%；Cr in fine powder2O3Content 99.5%.
1000 mesh active alphas-alumina powder, 5%；
325 mesh aluminous cements, 4.5%；
Phosphate solution, 0.5%；
Water, it is additional, 5%.
A kind of Cr2O3The material of content 8.1%, consisting of（According to weight percent）：
The electro-corundum aggregate of 5~0mm, 72%；Al in aggregate2O3Content 99%.
The electro-corundum fine powder of 180~325 mesh, 10%；Al in fine powder2O3Content 99%.
The electric smelting chromium oxide fine powder of 180~325 mesh, 9%；Cr in fine powder2O3Content 90%.
1000 mesh active alphas-alumina powder, 5%；
325 mesh aluminous cements, 4.5%；
Phosphate solution, 0.5%；
Water, it is additional, 5%.
Specific preparation process is as follows：
The heat-resisting steel part of plug brick embedded set inverted U, three layers of spike-tooth are welded on U-shaped steel part, and every layer of spike-tooth has 8.U-shaped steel part is most lower
The spike-tooth at end is embedded in pyramid type plug head, and the spike-tooth in the middle part of U-shaped steel part is embedded in the middle part of pyramid type plug, U-shaped steel part top
Spike-tooth is embedded in the plug tail portion of cylindrical type.The top of U-shaped steel part is exposed in the pit of cylindrical type plug tail portion, forms a hook
Ring.
During molding, first by Cr2O3In the material injection mold of content 90.5%, vibrated, it is heat-resisting that slurry will cover inverted U
Smooth slurry is carried out grooving processing, reinjects Cr by the spike-tooth of steel part bottom2O3The material of content 8.1% continues to vibrate,
Until prefabricated formulate position to mold.
It is demoulded after material hardening, 150 DEG C are dried, 500 DEG C of heat treatments.
Embodiment two：
Prefabricated profiled plug brick is divided into the pyramid type plug head for playing the role of anti-erosion, plays the pyramid type plug of connection function
Middle part and the cylindrical type tail portion for playing plugging action.Pyramid type plug head is Cr2O3The material of content 79%, pyramid type plug middle part
Tail portion with cylindrical type is Cr2O3The material of content 14.9%.
A kind of Cr2O3The material of content 79%, consisting of（According to weight percent）：
The sintering oxidation chromium aggregate of 5~0mm, 68%；Cr in aggregate2O3Content 90%.
The sintering oxidation chromium fine powder of 180~325 mesh, 18%；Cr in fine powder2O3Content 99%.
1000 mesh active alphas-alumina powder, 8%；
325 mesh aluminous cements, 1%；
Phosphate, 5%；
Water, it is additional, 6%.
A kind of Cr2O3The material of content 14.9%, consisting of（According to weight percent）：
The alundum aggregate of 5~0mm, 68%；Al in aggregate2O3Content 99%.
The alundum fine powder of 180~325 mesh, 3%；Al in fine powder2O3Content 99%.
The sintering oxidation chromium fine powder of 180~325 mesh, 15%；Cr in fine powder2O3Content 99%.
1000 mesh active alphas-alumina powder, 8%；
325 mesh aluminous cements, 1%；
Phosphate, 5%；
Water, it is additional, 6%.
Specific preparation process is as follows：
The heat-resisting steel part of plug brick embedded set inverted U, three layers of spike-tooth are welded on U-shaped steel part, and every layer of spike-tooth has 8.U-shaped steel part is most lower
The spike-tooth at end is embedded in pyramid type plug head, and the spike-tooth in the middle part of U-shaped steel part is embedded in the middle part of pyramid type plug, U-shaped steel part top
Spike-tooth is embedded in the plug tail portion of cylindrical type.The top of U-shaped steel part is exposed in the pit of cylindrical type plug tail portion, forms a hook
Ring.
During molding, first by Cr2O3In the material injection mold of content 79%, vibrated, slurry will cover inverted U heat resisting steel
Smooth slurry is carried out grooving processing, reinjects Cr by the spike-tooth of part bottom2O3The material of content 14.9% continues to vibrate, directly
To prefabricated position is formulated to mold.
It is demoulded after material hardening, 135 DEG C are dried, 450 DEG C of heat treatments.
Embodiment three：
Prefabricated profiled plug brick is divided into the pyramid type plug head for playing the role of anti-erosion, plays the pyramid type plug of connection function
Middle part and the cylindrical type tail portion for playing plugging action.Pyramid type plug head is Cr2O3The material of content 84.2%, in pyramid type plug
Portion and the tail portion of cylindrical type are Cr2O3The material of content 6.1%.
A kind of Cr2O3The material of content 84.2%, it is characterised in that：
Consisting of（According to weight percent）：
The sintering oxidation chromium aggregate of 5~0mm, 70%；Cr in aggregate2O3Content 99%.
The electric smelting chromium oxide fine powder of 180~325 mesh, 15%；Cr in fine powder2O3Content 99%.
1000 mesh active alphas-alumina powder, 10%；
325 mesh aluminous cements, 0.5%；
Phosphate solution, 4.5%；
Water, it is additional, 3%.
A kind of Cr2O3The material of content 6.1%, it is characterised in that：
The electro-corundum aggregate of 5~0mm, 70%；Al in aggregate2O3Content 99%.
The alundum fine powder of 180~325 mesh, 8%；Al in fine powder2O3Content 99%.
The sintering oxidation chromium fine powder of 180~325 mesh, 7%；Cr in fine powder2O3Content 87%.
1000 mesh active alphas-alumina powder, 10%；
325 mesh aluminous cements, 0.5%；
Phosphate, 4.5%；
Water, it is additional, 3%.
Specific preparation process is as follows：
The heat-resisting steel part of plug brick embedded set inverted U, three layers of spike-tooth are welded on U-shaped steel part, and every layer of spike-tooth has 8.U-shaped steel part is most lower
The spike-tooth at end is embedded in pyramid type plug head, and the spike-tooth in the middle part of U-shaped steel part is embedded in the middle part of pyramid type plug, U-shaped steel part top
Spike-tooth is embedded in the plug tail portion of cylindrical type.The top of U-shaped steel part is exposed in the pit of cylindrical type plug tail portion, forms a hook
Ring.
During molding, first by Cr2O3In the material injection mold of content 84.2%, vibrated, it is heat-resisting that slurry will cover inverted U
Smooth slurry is carried out grooving processing, reinjects Cr by the spike-tooth of steel part bottom2O3The material of content 6.1% continues to vibrate,
Until prefabricated formulate position to mold.
It is demoulded after material hardening, 150 DEG C are dried, 400 DEG C of heat treatments.
A kind of effect of the preparation method of four nozzle gasification furnace plug bricks of functionally gradient is carried out by three embodiments
Explanation.Functionally gradient plug brick prepared by embodiment, the weight of plug brick reduce 20.3%, 19.7%, 21.7% respectively；Cr2O3
Material consumption reduces 78.3%, 75.7%, 81.2% respectively.The usage quantity of chromium oxide material is efficiently reduced, reduces plug brick
Financial cost, reduce plug brick quality, reduce gasifier operation during plug brick high temperature plug working strength.
Claims (5)
1. a kind of four nozzle gasification furnace plug bricks of functionally gradient, it is characterised in that：The plug brick has to play anti-invade
The plug of erosion effect；The plug is circular cone stage body be prepared by high-chromium material, tapered diameter from top to bottom；It is described stifled
The upper end of head has the plug link block to play connection function；The plug link block is the upward flaring in upper end by plug
The circular cone stage body of diameter；The upper end of the plug link block has the tail portion sprue to play plugging action；The tail portion sprue
It is more than the cylinder of plug link block maximum gauge for diameter；The center of the upper surface of the tail portion sprue has groove；It is described
Tail portion sprue be integrally formed with the plug link block by low chromium material；The integrally formed tail portion sprue and described
Plug link block builds by laying bricks or stones with plug and is formed as one plug brick；The center of the plug brick is inserted with heat-resisting reinforcing bar；It is described heat-resisting
The lower end of reinforcing bar is located in the plug, and upper end is located in the groove；The heat-resisting reinforcing bar and the plug block up
It is connected between head link block and tail portion sprue by heat-resisting spike-tooth；The high-chromium material is Cr2O3Content is 70~93%
Material；The low chromium material is Cr2O3Content is 2~15% material.
2. a kind of four nozzle gasification furnace plug bricks of functionally gradient as described in claim 1, it is characterised in that：The Cr2O3Contain
It measures and is for the raw material composition and weight percent of 70~93% materials：The electric smelting of 5~0mm or sintering oxidation chromium aggregate 68~72%；
Cr in aggregate2O3Content>86%；The electric smelting of 180~325 mesh or sintering oxidation chromium fine powder 12~20%；Cr in fine powder2O3Content>
86%；1000 mesh active alphas-alumina powder 5~10%；325 mesh aluminous cements 0.5~8%；Phosphate solution 0.5~8%；
The water of also additional promising raw material gross weight 3~6%.
3. a kind of four nozzle gasification furnace plug bricks of functionally gradient as described in claim 1, it is characterised in that：The Cr2O3Contain
Measure the material for 2~15% raw material composition and weight percent be：The electric smelting of 5~0mm or alundum aggregate 68~72%,
Al in aggregate2O3Content 99%；The electric smelting of 180~325 mesh or alundum fine powder 3~18%, Al in fine powder2O3Content 99%；
The electric smelting of 180~325 mesh or sintering oxidation chromium fine powder, 2~17%；Cr in fine powder2O3Content>86%；1000 mesh activity Alpha-aluminas
Micro mist, 5~10%；325 mesh aluminous cements 0.5~8%；Phosphate solution 0.5~8%；Also additional promising raw material gross weight 3~
6% water.
4. a kind of four nozzle gasification furnace plug bricks of functionally gradient as described in claim 1, it is characterised in that：Described is heat-resisting
Reinforcing bar is inverted U.
5. a kind of preparation method of four nozzle gasification furnace plug bricks of any functionally gradients of claim 1-4 is prepared, it is special
Sign is：The heat-resisting reinforcing bar of plug brick embedded set inverted U welds three layers of heat-resisting spike-tooth on heat-resisting reinforcing bar, and every layer of heat-resisting spike-tooth is more
It is a；The heat-resisting heat-resisting spike-tooth of reinforcing bar the lowermost is embedded in plug, and the spike-tooth in the middle part of heat-resisting reinforcing bar is embedded in plug link block, heat-resisting
The heat-resisting spike-tooth on reinforcing bar top is embedded in the sprue of tail portion；The top of heat-resisting reinforcing bar is exposed in the groove of tail portion sprue, forms one
A shackle；During molding, first by Cr2O3In the material injection mold of content 70~93%, vibrated, it is resistance to that slurry will cover inverted U
Smooth slurry is carried out grooving processing, reinjects Cr by the heat-resisting spike-tooth of hot reinforcing bar bottom2O3The material of content 2~15%, after
Continuous vibration, until prefabricated formulate position to mold；It is demoulded after material hardening, 120~150 DEG C are dried, and 400~500
DEG C heat treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216351.4A CN108191384B (en) | 2018-03-16 | 2018-03-16 | Functionally-graded four-nozzle gasifier plug brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216351.4A CN108191384B (en) | 2018-03-16 | 2018-03-16 | Functionally-graded four-nozzle gasifier plug brick and preparation method thereof |
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| CN108191384A true CN108191384A (en) | 2018-06-22 |
| CN108191384B CN108191384B (en) | 2022-11-29 |
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| Publication number | Publication date |
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| CN108191384B (en) | 2022-11-29 |
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