CN101935229A - Microporous high chrome brick and preparation method thereof - Google Patents
Microporous high chrome brick and preparation method thereof Download PDFInfo
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- CN101935229A CN101935229A CN 201010290267 CN201010290267A CN101935229A CN 101935229 A CN101935229 A CN 101935229A CN 201010290267 CN201010290267 CN 201010290267 CN 201010290267 A CN201010290267 A CN 201010290267A CN 101935229 A CN101935229 A CN 101935229A
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Abstract
The invention relates to a microporous high chrome brick and a preparation method thereof. According to the technical scheme thereof, the microporous high chrome brick comprises the following compositions: 40-70 wt percent of fused chromium oxide particle, 10-20 wt percent of fused chromium oxide fine powder, 0.3-5 wt percent of SiC particle, 0.3-5 wt percent of SiC fine powder, 3-15 wt percent of monoclinic zirconia micropowder, 2-15 wt percent of alumina micropowder and 4-12 wt percent of chromium oxide green fine powder, and dextrin and aluminum dihydrogen phosphate which respectively occupy 0.5-3 wt percent and 2-7 wt percent of the mixture are added as binders. The preparation method comprises the following steps of dry mixing the fused chromium oxide particle with the SiC particle for 3-5min according to the compositions, adding the aluminum dihydrogen phosphate to be wet mixed for 5-7min, then adding a mixed powder prefabricated from the fused chromium oxide fine powder, the SiC fine powder, the monoclinic zirconia micropowder, the alumina micropowder, the chromium oxide green fine powder and the dextrin, mixing milling for 15-30min, ageing the mixture, pressing to form a green body, drying, and sintering in air at the temperature 1350-1650 DEG C. The invention has the advantages of simple process, high micropore formation rate of the prepared microporous high chrome brick and good cinder permeation resistance, and prolongs the service life of a high chrome brick.
Description
Technical field
The invention belongs to the high-chrome brick technical field, relate generally to a kind of micropore high-chrome brick and preparation method thereof.
Technical background
It is big that high-chrome brick has under the hot conditions intensity, and good resistance to acid cinder aggressiveness and perviousness are the inner lining materials of coal water slurry pressurized gasifier key.Over past ten years along with the development of chemical fertilizer industry and the appearance of various new technology and novel process, the working conditions of coal slurry gasifier is abominable further, and up to 1500 ℃, the pressure of furnace gas can reach 6.5MPa as working temperature, reducing gas is strong, and the fusing point of slag is low, viscosity is little and acid strong; Simultaneously along with the increase of single coal feeding amount and the increase of bed drain purge, the washing away of high velocity air, and the rapid fluctuation of stove internal gas pressure and temperature have proposed very harsh requirement to high-chrome brick.
The manufacture method of existing high-chrome brick generally is to be aggregate with electric smelting or sintering oxidation chromium, with chromic oxide fine powder, alumina powder, chromoxide green fine powder and monoclinic zirconia micro mist is matrix, adding dextrin and phosphoric acid salt is wedding agent, through batching, mixed grind, ageing mixture and mechanical pressing, in the high temperature kiln, fire then and form through 1650 ℃.This high-chrome brick is firing temperature height not only in process of production, and its micropore rate is very low, anti-cinder poor permeability.Reason is that high-chrome brick is when firing in oxidizing atmosphere, chromic oxide can be oxidized to high price gaseous oxidation thing, evaporation-cohesion mass transfer is filled intergranular neck, stoped volumetric shrinkage, be difficult to sintering densification, and the micropore rate low [beam Yonghe County, Li Nan etc. low temperature synthesizes high chromium sintered material [J] refractory materials, 2001,35 (4): 199～201].When high-chrome brick burns till under the carbon atmosphere as burying in strongly reducing atmosphere, at a lower temperature just can the tight burning densification, but the crystal grain anormogenesis is grown up in the brick, the anti-thermal shock stability of material reduces (Xu Yanqing greatly, Sun Jialin etc. sintering character research [J] the Wuhan University Of Technology journal of chromium oxide material under the atmospheric condition, 2010,33 (2): 170～174).Reaction process is complicated and be difficult to control under the reducing atmosphere, in case as bury that coke directly contacts with high-chrome brick under the carbon atmosphere, will stay responding layer on its surface, the performance generation of goods is had a strong impact on (beam Yonghe County .Cr such as Sun Chengxu
2O
3-ZrO
2The sintering of material and Study on Thermal Shock Resistance. refractory materials, 2001,35 (5): 258～260).
Summary of the invention
The present invention is intended to overcome the prior art defective, and purpose is to provide a kind of micropore rate height, anti-cinder penetrating quality good, micropore high-chrome brick that can increase the service life and preparation method thereof.
To achieve these goals, the technical solution used in the present invention is: the component of micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 40～70wt%, electric smelting chromic oxide fine powder are that 10～20wt%, SiC particle are that 0.3～5wt%, SiC fine powder are that 0.3～5wt%, monoclinic zirconia micro mist are that 3～15wt%, alumina powder are that 2～15wt% and chromoxide green fine powder are 4～12wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned raw materials 0.5～3wt% and 2～7wt% is as wedding agent.
Component by described micropore high-chrome brick: first general electric smelting chromic oxide fine powder, SiC fine powder, monoclinic zirconia micro mist, alumina powder and chromoxide green fine powder wherein mixes by quality percentage composition separately, is prefabricated into mixed powder; Again wherein electric smelting chrome oxide particle and SiC particle were done mixed 3～5 minutes by quality percentage composition separately, outer dosage by dextrin and aluminium dihydrogen phosphate joins it in electric smelting chrome oxide particle and the SiC particulate dry blend then, the composite grain material is made in wet mixing 5～7 minutes; At last the mixed powder that is prefabricated into is joined in the composite grain material, mixed grind 15～30 minutes, ageing mixture is pressed into green compact, and drying is burnt till under 1350 ℃～1650 ℃ conditions in air at last.
Wherein: the SiC particle grain size distribution is: granularity is the 0.1～2wt% that accounts for of 3～1mm, and granularity is the 0.1～2wt% that accounts for of 1～0.5mm, and granularity is the 0.1～1wt% that accounts for of 0.5～0.088mm; The size distribution of SiC fine powder is: granularity is the 0.1～2wt% that accounts for of＜0.088mm, and granularity is the 0.1～2wt% that accounts for of＜0.045mm, and granularity is the 0.1～1wt% that accounts for of＜0.025mm; The size distribution of electric smelting chrome oxide particle is: granularity is the 10～15wt% that accounts for of 4～2mm, and granularity is the 15～25wt% that accounts for of 2～1mm, and granularity is the 5～10wt% that accounts for of 1～0.5mm, and granularity is the 10～20wt% that accounts for of 0.5～0.088mm; The size distribution of electric smelting chromic oxide fine powder is: granularity is the 5～10wt% that accounts for of＜0.088mm, and granularity is the 5～10wt% that accounts for of＜0.045mm; The granularity of monoclinic zirconia micro mist is＜0.01mm; The granularity of alumina powder is＜0.005mm; The granularity of chromoxide green fine powder is＜0.045mm.
Owing to adopt technique scheme, when temperature reached 1200 ℃, SiC began slow oxidation and forms SiO and CO gas the prepared micropore high-chrome brick of the present invention, has reduced the material internal oxygen partial pressure in sintering procedure, make weak reducing atmosphere, promoted the sintering of high-chrome brick.Simultaneously CO gas restores part suboxide and non-metering compound at material internal, stops up pore, improves the micropore rate of material, reduced cinder by pore to micropore high-chrome brick internal penetration.
Technology of the present invention is simple, prepared micropore high-chrome brick micropore rate height, and wherein＜1 the pore volume rate of μ m is greater than 30%, and anti-cinder good penetrability has prolonged work-ing life of high-chrome brick.
Embodiment
The invention will be further described below in conjunction with embodiment, is not the restriction to protection domain:
For avoiding repetition, technical parameter unification with involved raw material in this embodiment earlier is described below, repeat no more among the embodiment: the SiC particle grain size distribution is: granularity is the 0.1～2wt% that accounts for of 3～1mm, granularity is the 0.1～2wt% that accounts for of 1～0.5mm, and granularity is the 0.1～1wt% that accounts for of 0.5～0.088mm; The size distribution of SiC fine powder is: granularity is the 0.1～2wt% that accounts for of＜0.088mm, and granularity is the 0.1～2wt% that accounts for of＜0.045mm, and granularity is the 0.1～1wt% that accounts for of＜0.025mm; The size distribution of electric smelting chrome oxide particle is: granularity is the 10～15wt% that accounts for of 4～2mm, and granularity is the 15～25wt% that accounts for of 2～1mm, and granularity is the 5～10wt% that accounts for of 1～0.5mm, and granularity is the 10～20wt% that accounts for of 0.5～0.088mm; The size distribution of electric smelting chromic oxide fine powder is: granularity is the 5～10wt% that accounts for of＜0.088mm, and granularity is the 5～10wt% that accounts for of＜0.045mm; The granularity of monoclinic zirconia micro mist is＜0.01mm; The granularity of alumina powder is＜0.005mm; The granularity of chromoxide green fine powder is＜0.045mm.
Embodiment 1
A kind of micropore high-chrome brick and preparation method thereof, the component of this micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 40～45wt%, electric smelting chromic oxide fine powder are that 15～20wt%, SiC particle are 4～5wt%, the SiC fine powder is that 4～5wt%, monoclinic zirconia micro mist are that 10～15wt%, alumina powder are that 5～8wt% and chromoxide green fine powder are 8～12wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned compound 1～2wt% and 5～7wt% is as wedding agent.
Component by described micropore high-chrome brick: first general electric smelting chromic oxide fine powder, SiC fine powder, monoclinic zirconia micro mist, alumina powder and chromoxide green fine powder wherein mixes by quality percentage composition separately, is prefabricated into mixed powder; Again wherein electric smelting chrome oxide particle and SiC particle were done mixed 3～5 minutes by quality percentage composition separately, outer dosage by dextrin and aluminium dihydrogen phosphate joins it in electric smelting chrome oxide particle and the SiC particulate dry blend then, the composite grain material is made in wet mixing 5～7 minutes; At last the mixed powder that is prefabricated into is joined in the composite grain material, mixed grind 15～30 minutes, ageing mixture is pressed into green compact, and drying is burnt till under 1350 ℃～1400 ℃ conditions in air at last.
The prepared micropore high-chrome brick of present embodiment after testing, the pore volume rate of＜1 μ m is 30～38%.
Embodiment 2
A kind of micropore high-chrome brick and preparation method thereof, the component of this micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 45～50wt%, electric smelting chromic oxide fine powder are that 10～15wt%, SiC particle are 2～4wt%, the SiC fine powder is that 2～4wt%, monoclinic zirconia micro mist are that 8～10wt%, alumina powder are that 12～15wt% and chromoxide green fine powder are 4～8wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned compound 0.5～1wt% and 3～5wt% is as wedding agent.
Preparation technology is except that burning till under 1400～1450 ℃ of conditions in air at last, and all the other are with embodiment 1.
The prepared micropore high-chrome brick of present embodiment after testing, the pore volume rate of＜1 μ m is 31～35%.
Embodiment 3
A kind of micropore high-chrome brick and preparation method thereof, the component of this micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 50～55wt%, electric smelting chromic oxide fine powder are that 15～20wt%, SiC particle are 1～2wt%, the SiC fine powder is that 1～2wt%, monoclinic zirconia micro mist are that 5～8wt%, alumina powder are that 8～12wt% and chromoxide green fine powder are 7～11wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned compound 1～3wt% and 2～3wt% is as wedding agent.
Preparation technology is except that burning till under 1450～1500 ℃ of conditions in air at last, and all the other are with embodiment 1.
The prepared micropore high-chrome brick of present embodiment after testing, the pore volume rate of＜1 μ m is 35～32%.
Embodiment 4
A kind of micropore high-chrome brick and preparation method thereof, the component of this micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 55～60wt%, electric smelting chromic oxide fine powder are that 10～15wt%, SiC particle are 0.3～1wt%, the SiC fine powder is that 4～5wt%, monoclinic zirconia micro mist are that 7～11wt%, alumina powder are that 4～8wt% and chromoxide green fine powder are 5～10wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned compound 1.5～2.5wt% and 2～5wt% is as wedding agent.
Preparation technology is except that burning till under 1500～1550 ℃ of conditions in air at last, and all the other are with embodiment 1.
The prepared micropore high-chrome brick of present embodiment after testing, the pore volume rate of＜1 μ m is 33～39%.
Embodiment 5
A kind of micropore high-chrome brick and preparation method thereof, the component of this micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 60～65wt%, electric smelting chromic oxide fine powder are that 15～20wt%, SiC particle are 2～4wt%, the SiC fine powder is that 0.3～1wt%, monoclinic zirconia micro mist are that 4～6wt%, alumina powder are that 2～6wt% and chromoxide green fine powder are 4～6wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned compound 2～3wt% and 4～7wt% is as wedding agent.
Preparation technology is except that burning till under 1550～1600 ℃ of conditions in air at last, and all the other are with embodiment 1.
The prepared micropore high-chrome brick of present embodiment after testing, the pore volume rate of＜1 μ m is 37～43%.
Embodiment 6
A kind of micropore high-chrome brick and preparation method thereof, the component of this micropore high-chrome brick and quality percentage composition thereof are: the electric smelting chrome oxide particle is that 65～70wt%, electric smelting chromic oxide fine powder are that 10～15wt%, SiC particle are 0.3～1wt%, the SiC fine powder is that 0.3～1wt%, monoclinic zirconia micro mist are that 3～5wt%, alumina powder are that 6～12wt% and chromoxide green fine powder are 4～6wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned compound 0.5～1.5wt% and 2～5wt% is as wedding agent.
Preparation technology is except that burning till under 1600～1650 ℃ of conditions in air at last, and all the other are with embodiment 1.
The prepared micropore high-chrome brick of present embodiment after testing, the pore volume rate of＜1 μ m is 35～39%.
When temperature reached 1200 ℃, SiC began slow oxidation and forms SiO and CO gas the prepared micropore high-chrome brick of this embodiment, has reduced the material internal oxygen partial pressure, has made weak reducing atmosphere, has promoted the sintering of high-chrome brick in sintering procedure.Simultaneously CO gas restores part suboxide and non-metering compound at material internal, stops up pore, improves the micropore rate of material, reduced cinder by pore to micropore high-chrome brick internal penetration.
This embodiment technology is simple, prepared micropore high-chrome brick micropore rate height, and wherein＜1 the pore volume rate of μ m is greater than 30%, and anti-cinder good penetrability has prolonged work-ing life of high-chrome brick.
Claims (7)
1. the preparation method of a micropore high-chrome brick, the component and the quality percentage composition thereof that it is characterized in that described high-chrome brick are: the electric smelting chrome oxide particle is that 40～70wt%, electric smelting chromic oxide fine powder are that 10～20wt%, SiC particle are that 0.3～5wt%, SiC fine powder are that 0.3～5wt%, monoclinic zirconia micro mist are that 3～15wt%, alumina powder are that 2～15wt% and chromoxide green fine powder are 4～12wt%, and the aluminium dihydrogen phosphate that adds the dextrin of above-mentioned raw materials 0.5～3wt% and 2～7wt% is as wedding agent;
Component by described micropore high-chrome brick: first general electric smelting chromic oxide fine powder, SiC fine powder, monoclinic zirconia micro mist, alumina powder and chromoxide green fine powder wherein mixes by quality percentage composition separately, is prefabricated into mixed powder; Again wherein electric smelting chrome oxide particle and SiC particle were done mixed 3～5 minutes by quality percentage composition separately, outer dosage by dextrin and aluminium dihydrogen phosphate joins it in electric smelting chrome oxide particle and the SiC particulate dry blend then, the composite grain material is made in wet mixing 5～7 minutes; At last the mixed powder that is prefabricated into is joined in the composite grain material, mixed grind 15～30 minutes, ageing mixture is pressed into green compact, and drying is burnt till under 1350 ℃～1650 ℃ conditions in air at last.
2. the preparation method of micropore high-chrome brick according to claim 1, it is characterized in that described SiC particle grain size distribution is: granularity is the 0.1～2wt% that accounts for of 3～1mm, granularity is the 0.1～2wt% that accounts for of 1～0.5mm, and granularity is the 0.1～1wt% that accounts for of 0.5～0.088mm.
3. the preparation method of micropore high-chrome brick according to claim 1, the size distribution that it is characterized in that described SiC fine powder is: granularity is the 0.1～2wt% that accounts for of＜0.088mm, granularity is the 0.1～2wt% that accounts for of＜0.045mm, and granularity is the 0.1～1wt% that accounts for of＜0.025mm.
4. the preparation method of micropore high-chrome brick according to claim 1, the size distribution that it is characterized in that described electric smelting chrome oxide particle is: granularity is the 10～15wt% that accounts for of 4～2mm, granularity is the 15～25wt% that accounts for of 2～1mm, granularity is the 5～10wt% that accounts for of 1～0.5mm, and granularity is the 10～20wt% that accounts for of 0.5～0.088mm.
5. the preparation method of micropore high-chrome brick according to claim 1 is characterized in that the size distribution of described electric smelting chromic oxide fine powder is: granularity is the 5～10wt% that accounts for of＜0.088mm, and granularity is the 5～10wt% that accounts for of＜0.045mm.
6. the preparation method of micropore high-chrome brick according to claim 1 is characterized in that the granularity of described monoclinic zirconia micro mist is＜0.01mm; The granularity of alumina powder is＜0.005mm; The granularity of chromoxide green fine powder is＜0.045mm.
7. according to the prepared micropore high-chrome brick of preparation method of each described micropore high-chrome brick in the claim 1～6.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295461A (en) * | 2011-06-02 | 2011-12-28 | 江苏君耀耐磨耐火材料有限公司 | Junya red brick for petrochemical heater and preparation process thereof |
| CN103159489A (en) * | 2013-03-15 | 2013-06-19 | 武汉科技大学 | Fabricated part for coal water slurry pressurization gasification furnace and production method thereof |
| CN104478442A (en) * | 2014-11-14 | 2015-04-01 | 宜兴瑞泰耐火材料有限公司 | Plugging brick for top opening of water-coal slurry gasification furnace and preparation process thereof |
| CN104557072A (en) * | 2014-11-10 | 2015-04-29 | 宜兴市中韩窑业工程有限公司 | High-chromium brick and preparation method thereof |
| CN104671803A (en) * | 2015-01-16 | 2015-06-03 | 长兴正发热电耐火材料有限公司 | Metallic high chrome brick and preparation method thereof |
| CN110818437A (en) * | 2019-12-11 | 2020-02-21 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of silicon carbide-oxide composite refractory product |
| CN112110737A (en) * | 2020-09-23 | 2020-12-22 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | High-chromium refractory material and preparation method thereof |
| CN112194473A (en) * | 2020-06-30 | 2021-01-08 | 中国建筑材料科学研究总院有限公司 | Chrome corundum brick with high erosion resistance and thermal shock resistance prepared by secondary mixed grinding and drying and process thereof |
| CN112313188A (en) * | 2018-07-02 | 2021-02-02 | 东京窯业株式会社 | Chromium oxide brick |
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| CN102295461A (en) * | 2011-06-02 | 2011-12-28 | 江苏君耀耐磨耐火材料有限公司 | Junya red brick for petrochemical heater and preparation process thereof |
| CN102295461B (en) * | 2011-06-02 | 2013-10-30 | 江苏君耀耐磨耐火材料有限公司 | Red brick for petrochemical heater and preparation process thereof |
| CN103159489A (en) * | 2013-03-15 | 2013-06-19 | 武汉科技大学 | Fabricated part for coal water slurry pressurization gasification furnace and production method thereof |
| CN103159489B (en) * | 2013-03-15 | 2014-06-18 | 武汉科技大学 | Fabricated part for coal water slurry pressurization gasification furnace and production method thereof |
| CN104557072A (en) * | 2014-11-10 | 2015-04-29 | 宜兴市中韩窑业工程有限公司 | High-chromium brick and preparation method thereof |
| CN104478442A (en) * | 2014-11-14 | 2015-04-01 | 宜兴瑞泰耐火材料有限公司 | Plugging brick for top opening of water-coal slurry gasification furnace and preparation process thereof |
| CN104671803A (en) * | 2015-01-16 | 2015-06-03 | 长兴正发热电耐火材料有限公司 | Metallic high chrome brick and preparation method thereof |
| CN112313188A (en) * | 2018-07-02 | 2021-02-02 | 东京窯业株式会社 | Chromium oxide brick |
| EP3819275A4 (en) * | 2018-07-02 | 2022-03-16 | TYK Corporation | Chromia-based brick |
| CN110818437A (en) * | 2019-12-11 | 2020-02-21 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of silicon carbide-oxide composite refractory product |
| CN110818437B (en) * | 2019-12-11 | 2021-05-25 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of silicon carbide-oxide composite refractory product |
| CN112194473A (en) * | 2020-06-30 | 2021-01-08 | 中国建筑材料科学研究总院有限公司 | Chrome corundum brick with high erosion resistance and thermal shock resistance prepared by secondary mixed grinding and drying and process thereof |
| CN112194473B (en) * | 2020-06-30 | 2022-05-27 | 中国建筑材料科学研究总院有限公司 | Chrome corundum brick with high erosion resistance and thermal shock resistance prepared by secondary mixed grinding and drying and process thereof |
| CN112110737A (en) * | 2020-09-23 | 2020-12-22 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | High-chromium refractory material and preparation method thereof |
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