CN103159489B - Fabricated part for coal water slurry pressurization gasification furnace and production method thereof - Google Patents
Fabricated part for coal water slurry pressurization gasification furnace and production method thereof Download PDFInfo
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- CN103159489B CN103159489B CN201310083219.8A CN201310083219A CN103159489B CN 103159489 B CN103159489 B CN 103159489B CN 201310083219 A CN201310083219 A CN 201310083219A CN 103159489 B CN103159489 B CN 103159489B
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Abstract
The invention relates to a fabricated part for a coal water slurry pressurization gasification furnace and a production method thereof. The technical scheme is as follows: the production method comprises the following steps of: by utilizing 40-70wt% of electric melting chromium oxide particles, 10-25wt% of fused zirconia alumina particles, 5-20wt% of electric melting chromium oxide fine powder, 2-10wt% of alumina micro powder, 3-10wt% of monoclinic zirconium oxide micro powder and 1-10wt% of chromium oxide green micro powder as raw materials, mixing the raw materials, and then, adding 0.5-3wt% of pure calcium aluminate cement, 0.1-0.8wt% of isobutylene polymer, 0.1-0.2wt% of a gather carboxylate water-reducing agent and 2-6wt% of water; and uniformly stirring, vibrating to form, curing at 20-50 DEG C for 1-2 days, demoulding, drying and sintering at 1400-1600 DEG C in the air. The preparation method is simple and low in production cost; and the fabricated part for the coal water slurry pressurization gasification furnace produced by the method has a long service life, high strength and excellent thermal shock resistance and corrosion resistance.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of coal water slurry pressurized gasifier prefabricated component and preparation method thereof.
Background technology
In recent years, international oil price is constantly soaring, and the chemical industry take coal as raw material progressively demonstrates competitive edge.Therefore, the Coal Gasification Technology of China is rapidly developed, and meanwhile, also coal water slurry pressurized gasifier is had higher requirement with refractory materials.
Due to condition harshness in coal water slurry pressurized gasifier, high temperature, high pressure, and cinder erosion is serious, and therefore coal water slurry pressurized gasifier inner lining fireproof material is the study hotspot of researcher always.
" Cr-Zr brick for coal slurry gasifier and preparation method thereof " (CN 101591189 A) patented technology, the Cr-Zr brick for coal slurry gasifier inner lining material of preparation, adds ZrO on the basis that is main raw material at high chromium sand
2, Al
2o
3and rare earth oxide, in sintering procedure, adopt inert protective atmosphere, reduce firing temperature, its intensity is high, and apparent porosity is low.But there is following defect in the method: (1) mechanical pressing complex procedures, cost of labor and mould loss are all larger.(2) molded article in use corrodes seriously at brickwork joint position, greatly reduces the work-ing life of brick.By mould material replacement sizing brick " Application and Development of gas furnace dedicated pouring material " (" middle nitrogenous fertilizer " periodical the 3rd phase of May in 2002) technology, can improve converter life as producer gas generator inner lining material, and produce very large economic benefit, but coal water slurry pressurized gasifier working conditions is compared with producer gas generator harshness, this aluminium silicon is that casting material strength is lower, and erosion-resisting characteristics can not meet the working conditions of coal slurry gasifier.
Summary of the invention
The present invention is intended to overcome prior art defect, and object is to provide the preparation method of the coal water slurry pressurized gasifier prefabricated component that a kind of technique is simple and production cost is low; Prefabricated component long service life for the coal water slurry pressurized gasifier prepared by the method, intensity are high, thermal shock resistance and erosion-resisting characteristics good.
For achieving the above object, the technical solution adopted in the present invention is: the first electric smelting chrome oxide particle with 40 ~ 70wt%, the zircon corundum particle of 10 ~ 25wt%, the electric smelting chromic oxide fine powder of 5 ~ 20wt%, the alumina powder of 2 ~ 10wt%, the monoclinic zirconia micro mist of 3 ~ 10wt%, the chromoxide green micro mist of 1 ~ 10wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 0.5 ~ 3wt% again, the isobutene polymer of 0.1 ~ 0.8wt%, the polycarboxylate dehydragent of 0.1 ~ 0.2wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1400 ~ 1600 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
The size distribution of described electric smelting chrome oxide particle is: 4 ~ 3mm is 20 ~ 30wt%, and 3 ~ 2mm is 30 ~ 40wt%, and 2 ~ 1mm is 5 ~ 30wt%, and ﹤ 1mm is 10 ~ 35wt%.
ZrO in described zircon corundum
2content is 10 ~ 40wt%, and the size distribution of zircon corundum particle is: 2 ~ 1mm is 60 ~ 90wt%, and ﹤ 1mm is 10 ~ 40wt%.
Cr in described electric smelting chromic oxide fine powder
2o
3content ﹥ 99wt%, the particle diameter ﹤ 0.088mm of electric smelting chromic oxide fine powder.
Al in described alumina powder
2o
3content ﹥ 98wt%, the particle diameter ﹤ 10 μ m of alumina powder.
ZrO in described monoclinic zirconia micro mist
2content ﹥ 98wt%, the particle diameter ﹤ 10 μ m of monoclinic zirconia micro mist.
Cr in described chromoxide green micro mist
2o
3content ﹥ 99wt%, the particle diameter ﹤ 10 μ m of chromoxide green micro mist.
Al in described pure calcium aluminate cement
2o
3content ﹥ 70wt %.
Described isobutene polymer is water-soluble polymers, and its molecular weight is 55000 ~ 65000.
Owing to adopting technique scheme, the present invention adopts prefabricated component to replace existing high-chrome brick as coal water slurry pressurized gasifier inner lining material, in order to meet high strength, high thermal shock resistance and the rodent condition of high resistance, adopt electric-melting zirconia, electric fused zirconium corundum, alumina powder and monoclinic zirconia micro mist etc. as main raw material.Through a large amount of investigative tests, find a kind of isobutene polymer of solidifying of can promoting, this polymkeric substance is water-soluble, can be hydrolyzed at normal temperatures, make prefabricated component produce certain green strength, simultaneously due to this water-soluble polymers good dispersity, and residual without ash content after sintering, avoid the erosion-resisting characteristics causing because cement content is too high to decline.Compare with high-chrome brick, the Stress non-homogeneity causing because of friction press moulding is avoided in the production of this prefabricated component, the shortcoming of corner intensity difference, greatly reduce because building the brickwork joint in stove process simultaneously and improved work-ing life, and due to process reform, greatly reduce the artificial and die cost in production process.
Coal water slurry pressurized gasifier prepared by the present invention is 35 ~ 45MPa by green compact compressive strength after the prefabricated component demoulding, after burning, cold crushing strength is 120 ~ 145MPa, and strength at normal temperature is 16 ~ 20MPa, and thermal shock resistance is good, anti-scour property is good, and be 10000 ~ 11000 hours work-ing life.
Therefore, preparation technology of the present invention is simple and production cost is low; Prefabricated component long service life for the coal water slurry pressurized gasifier prepared by the method, intensity are high, thermal shock resistance and erosion-resisting characteristics good.
Embodiment
Below in conjunction with embodiment, the invention will be further described, not the restriction to its protection domain.
For avoiding repetition, now the technical parameter unification of related this embodiment raw material and additive is described below, in embodiment, repeat no more.
The size distribution of described electric smelting chrome oxide particle is: 4 ~ 3mm is 20 ~ 30wt%, and 3 ~ 2mm is 30 ~ 40wt%, and 2 ~ 1mm is 5 ~ 30wt%, and ﹤ 1mm is 10 ~ 35wt%.
ZrO in described zircon corundum
2content is 10 ~ 40wt%, and the size distribution of zircon corundum particle is: 2 ~ 1mm is 60 ~ 90wt%, and ﹤ 1mm is 10 ~ 40wt%.
Cr in described electric smelting chromic oxide fine powder
2o
3content ﹥ 99wt%, the particle diameter ﹤ 0.088mm of electric smelting chromic oxide fine powder.
Al in described alumina powder
2o
3content ﹥ 98wt%, the particle diameter ﹤ 10 μ m of alumina powder.
ZrO in described monoclinic zirconia micro mist
2content ﹥ 98wt%, the particle diameter ﹤ 10 μ m of monoclinic zirconia micro mist.
Cr in described chromoxide green micro mist
2o
3content ﹥ 99wt%, the particle diameter ﹤ 10 μ m of chromoxide green micro mist.
Al in described pure calcium aluminate cement
2o
3content ﹥ 70wt %.
Described isobutene polymer is water-soluble polymers, and its molecular weight is 55000 ~ 65000.
embodiment 1
A kind of prefabricated component and preparation method thereof for coal water slurry pressurized gasifier.The first electric smelting chrome oxide particle with 40 ~ 50wt%, the zircon corundum particle of 20 ~ 25wt%, the electric smelting chromic oxide fine powder of 15 ~ 20wt%, the alumina powder of 2 ~ 6wt%, the monoclinic zirconia micro mist of 7 ~ 10wt%, the chromoxide green micro mist of 1 ~ 6wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 0.5 ~ 1.5wt% again, the isobutene polymer of 0.5 ~ 0.8wt%, the polycarboxylate dehydragent of 0.1 ~ 0.15wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1400 ~ 1500 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
Coal water slurry pressurized gasifier prepared by the present embodiment 1 is 35 ~ 40MPa by green compact compressive strength after the prefabricated component demoulding, and after burning, cold crushing strength is 120 ~ 130MPa, and strength at normal temperature is 16 ~ 18MPa, and thermal shock resistance is good, and anti-scour property is good.
embodiment 2
A kind of prefabricated component and preparation method thereof for coal water slurry pressurized gasifier.The first electric smelting chrome oxide particle with 40 ~ 50wt%, the zircon corundum particle of 15 ~ 20wt%, the electric smelting chromic oxide fine powder of 10 ~ 15wt%, the alumina powder of 6 ~ 10wt%, the monoclinic zirconia micro mist of 7 ~ 10wt%, the chromoxide green micro mist of 5 ~ 10wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 1.0 ~ 2.0wt% again, the isobutene polymer of 0.2 ~ 0.5wt%, the polycarboxylate dehydragent of 0.15 ~ 0.2wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1500 ~ 1600 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
Coal water slurry pressurized gasifier prepared by the present embodiment 2 is 38 ~ 43MPa by green compact compressive strength after the prefabricated component demoulding, and after burning, cold crushing strength is 126 ~ 136MPa, and strength at normal temperature is 17 ~ 19MPa, and thermal shock resistance is good, and anti-scour property is good.
embodiment 3
A kind of prefabricated component and preparation method thereof for coal water slurry pressurized gasifier.The first electric smelting chrome oxide particle with 50 ~ 60wt%, the zircon corundum particle of 20 ~ 25wt%, the electric smelting chromic oxide fine powder of 5 ~ 10wt%, the alumina powder of 2 ~ 6wt%, the monoclinic zirconia micro mist of 5 ~ 8wt%, the chromoxide green micro mist of 1 ~ 6wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 2 ~ 3wt% again, the isobutene polymer of 0.1 ~ 0.4wt%, the polycarboxylate dehydragent of 0.15 ~ 0.2wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1400 ~ 1500 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
Coal water slurry pressurized gasifier prepared by the present embodiment 3 is 40 ~ 45MPa by green compact compressive strength after the prefabricated component demoulding, and after burning, cold crushing strength is 132 ~ 142MPa, and strength at normal temperature is 17 ~ 19MPa, and thermal shock resistance is good, and anti-scour property is good.
embodiment 4
A kind of prefabricated component and preparation method thereof for coal water slurry pressurized gasifier.The first electric smelting chrome oxide particle with 50 ~ 60wt%, the zircon corundum particle of 10 ~ 15wt%, the electric smelting chromic oxide fine powder of 15 ~ 20wt%, the alumina powder of 6 ~ 10wt%, the monoclinic zirconia micro mist of 3 ~ 6wt%, the chromoxide green micro mist of 1 ~ 6wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 1.5 ~ 2.5wt% again, the isobutene polymer of 0.3 ~ 0.6wt%, the polycarboxylate dehydragent of 0.15 ~ 0.2wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1500 ~ 1600 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
Coal water slurry pressurized gasifier prepared by the present embodiment 4 is 35 ~ 40MPa by green compact compressive strength after the prefabricated component demoulding, and after burning, cold crushing strength is 123 ~ 133MPa, and strength at normal temperature is 16 ~ 18MPa, and thermal shock resistance is good, and anti-scour property is good.
embodiment 5
A kind of prefabricated component and preparation method thereof for coal water slurry pressurized gasifier.The first electric smelting chrome oxide particle with 60 ~ 70wt%, the zircon corundum particle of 15 ~ 20t%, the electric smelting chromic oxide fine powder of 5 ~ 10wt%, the alumina powder of 2 ~ 6wt%, the monoclinic zirconia micro mist of 3 ~ 6wt%, the chromoxide green micro mist of 1 ~ 6wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 1 ~ 2wt% again, the isobutene polymer of 0.2 ~ 0.5wt%, the polycarboxylate dehydragent of 0.1 ~ 0.15wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1400 ~ 1500 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
Coal water slurry pressurized gasifier prepared by the present embodiment 5 is 37 ~ 42MPa by green compact compressive strength after the prefabricated component demoulding, and after burning, cold crushing strength is 129 ~ 139MPa, and strength at normal temperature is 17 ~ 19MPa, and thermal shock resistance is good, and anti-scour property is good.
embodiment 6
A kind of prefabricated component and preparation method thereof for coal water slurry pressurized gasifier.The first electric smelting chrome oxide particle with 60 ~ 70wt%, the zircon corundum particle of 10 ~ 15wt%, the electric smelting chromic oxide fine powder of 5 ~ 10wt%, the alumina powder of 2 ~ 6wt%, the monoclinic zirconia micro mist of 3 ~ 6wt%, the chromoxide green micro mist of 5 ~ 10wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 2 ~ 3wt% again, the isobutene polymer of 0.1 ~ 0.4wt%, the polycarboxylate dehydragent of 0.15 ~ 0.2wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1500 ~ 1600 ℃ of conditions, burn till, obtain coal water slurry pressurized gasifier prefabricated component.
Coal water slurry pressurized gasifier prepared by the present embodiment 6 is 40 ~ 45MPa by green compact compressive strength after the prefabricated component demoulding, and after burning, cold crushing strength is 135 ~ 145MPa, and strength at normal temperature is 18 ~ 20MPa, and thermal shock resistance is good, and anti-scour property is good.
This embodiment adopts prefabricated component to replace existing high-chrome brick as coal water slurry pressurized gasifier inner lining material, in order to meet high strength, high thermal shock resistance and the rodent condition of high resistance, adopt electric-melting zirconia, electric fused zirconium corundum, alumina powder and monoclinic zirconia micro mist etc. as main raw material.Through a large amount of investigative tests, find a kind of isobutene polymer of solidifying of can promoting, this polymkeric substance is water-soluble, can be hydrolyzed at normal temperatures, make prefabricated component produce certain green strength, simultaneously due to this water-soluble polymers good dispersity, and residual without ash content after sintering, avoid the erosion-resisting characteristics causing because cement content is too high to decline.Compare with high-chrome brick, the Stress non-homogeneity causing because of friction press moulding is avoided in the production of this prefabricated component, the shortcoming of corner intensity difference, greatly reduce because building the brickwork joint in stove process simultaneously and improved work-ing life, and due to process reform, greatly reduce the artificial and die cost in production process.
Coal water slurry pressurized gasifier prepared by this embodiment is 35 ~ 45MPa by green compact compressive strength after the prefabricated component demoulding, after burning, cold crushing strength is 120 ~ 145MPa, strength at normal temperature is 16 ~ 20MPa, thermal shock resistance is good, anti-scour property is good, and be 10000 ~ 11000 hours work-ing life.
Therefore, this embodiment preparation technology is simple and production cost is low; Prefabricated component long service life for the coal water slurry pressurized gasifier prepared by the method, intensity are high, thermal shock resistance and erosion-resisting characteristics good.
Claims (10)
1. the preparation method of a coal water slurry pressurized gasifier use prefabricated component, it is characterized in that the first electric smelting chrome oxide particle with 40 ~ 70wt%, the zircon corundum particle of 10 ~ 25wt%, the electric smelting chromic oxide fine powder of 5 ~ 20wt%, the alumina powder of 2 ~ 10wt%, the monoclinic zirconia micro mist of 3 ~ 10wt%, the chromoxide green micro mist of 1 ~ 10wt% is raw material, mix, the pure calcium aluminate cement of additional described raw material 0.5 ~ 3wt% again, the isobutene polymer of 0.1 ~ 0.8wt%, the polycarboxylate dehydragent of 0.1 ~ 0.2wt% and the water of 2 ~ 6wt%, stir, vibratory compaction, maintenance 1 ~ 2 day under 20 ~ 50 ℃ of conditions, the demoulding, dry, then in air, under 1400 ~ 1600 ℃ of conditions, burn till.
2. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, the size distribution that it is characterized in that described electric smelting chrome oxide particle is: 4 ~ 3mm is 20 ~ 30wt%, 3 ~ 2mm is 30 ~ 40wt%, and 2 ~ 1mm is 5 ~ 30wt%, and ﹤ 1mm is 10 ~ 35wt%.
3. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that ZrO in described zircon corundum
2content is 10 ~ 40wt%, and the size distribution of zircon corundum particle is: 2 ~ 1mm is 60 ~ 90wt%, and ﹤ 1mm is 10 ~ 40wt%.
4. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that Cr in described electric smelting chromic oxide fine powder
2o
3content ﹥ 99wt%, the particle diameter ﹤ 0.088mm of electric smelting chromic oxide fine powder.
5. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that Al in described alumina powder
2o
3content ﹥ 98wt%, the particle diameter ﹤ 10 μ m of alumina powder.
6. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that ZrO in described monoclinic zirconia micro mist
2content ﹥ 98wt%, the particle diameter ﹤ 10 μ m of monoclinic zirconia micro mist.
7. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that Cr in described chromoxide green micro mist
2o
3content ﹥ 99wt%, the particle diameter ﹤ 10 μ m of chromoxide green micro mist.
8. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that Al in described pure calcium aluminate cement
2o
3content ﹥ 70wt%.
9. the preparation method of prefabricated component for coal water slurry pressurized gasifier according to claim 1, is characterized in that described isobutene polymer is water-soluble polymers, and its molecular weight is 55000 ~ 65000.
10. a coal water slurry pressurized gasifier prefabricated component, is characterized in that described prefabricated component is for according to the prepared coal water slurry pressurized gasifier prefabricated component of preparation method of the coal water slurry pressurized gasifier prefabricated component described in any one in claim 1 ~ 9.
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| CN107032770B (en) * | 2017-06-05 | 2019-10-25 | 武汉科技大学 | Diffusion-type skeleton enhances corundum-spinel air brick and preparation method thereof |
| CN113213901B (en) * | 2021-03-31 | 2022-11-15 | 江苏长城窑炉工程有限公司 | High-chromium sand ramming mass for alkali furnace |
| CN114230351B (en) * | 2021-12-28 | 2023-02-10 | 宜兴瑞泰耐火材料工程有限公司 | Vacuum casting high-chromium brick and preparation process thereof |
| CN117430438B (en) * | 2023-12-20 | 2024-03-12 | 中钢洛耐科技股份有限公司 | Preparation method and application of high-purity chromium-zirconium refractory material for red mud iron recovery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935229A (en) * | 2010-09-25 | 2011-01-05 | 武汉科技大学 | Microporous high chrome brick and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935229A (en) * | 2010-09-25 | 2011-01-05 | 武汉科技大学 | Microporous high chrome brick and preparation method thereof |
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