CN103693974A - Lightweight heat-insulating fire brick and preparation method thereof - Google Patents
Lightweight heat-insulating fire brick and preparation method thereof Download PDFInfo
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- CN103693974A CN103693974A CN201310626786.3A CN201310626786A CN103693974A CN 103693974 A CN103693974 A CN 103693974A CN 201310626786 A CN201310626786 A CN 201310626786A CN 103693974 A CN103693974 A CN 103693974A
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Abstract
The invention discloses a lightweight heat-insulating fire brick comprising the following raw materials in percentage by weight: 3%-15% of plastic hollow balls or floating beads in fly ash, 3%-90% of clay powder, 0-90% of bauxite powder, 3%-8% of kyanite powder, 1%-4% of bentonite, 0-5% of aluminum dihydrogen phosphate and 0.01%-0.5% of sodium tripolyphosphate. The preparation method of the lightweight heat-insulating fire brick comprises the steps of firstly, mixing the plastic hollow balls or the floating beads in fly ash with the aluminum dihydrogen phosphate and the bentonite, and standing; then, adding the clay powder, the bauxite powder, the kyanite powder and the sodium tripolyphosphate, mixing and performing decomposition; adding lignosulfonate the weight of which accounts for 0.1%-2% of the total weight of the total raw material mixture and water the weight of which accounts for 5%-9% of the total weight of the total raw material mixture, and mixing; performing compression molding; and drying and firing. The strength of the lightweight heat-insulating fire brick disclosed by the invention is not lower than 4MPa after the brick is dried at 110 DEG C for 24 hours, the air-cooled thermal shock resistance stability of the brick is good at 1000 DEG C, the lightweight heat-insulating fire brick does not generate large cracks and damages for at least 5 times, the probability of chalking in use is reduced, and the brick is favorable for reducing energy consumption.
Description
Technical field
The present invention relates to a kind of refractory brick and preparation method, belong to particularly a kind of main use light fire brick on blast furnace hot air pipe series refractory material, process furnace, soaking pit and preparation method thereof.
Background technology
In the process furnace of using in Iron And Steel Industry, in the piping of blast funnace hot blast stove, use a large amount of light weight fireclay bricks, high alumina brick, owing to bearing pressure, surging force and the long-term load of gas, easily distortion, pulverizing.Common soft clay turns, high alumina brick relies on vitrified bond moulding, and intensity is low, and heat resistanceheat resistant destructive characteristics is poor, easily in use damages.
Through retrieval, find the patent documentation that Chinese Patent Application No. is CN201010587287.4, it discloses a kind of composition of light fire brick, is pearlstone 30-50%, clay 25-48%, mullite fiber 6-12%, aluminum phosphate 6-12%, polystyrene foam ball 2-3%; Its compressive strength 2.94MPa, volume density is 0.52g/cm
3, thermal conductivity≤0.48W/mK.The deficiency of its existence is that this product density is too low, and intensity is little, and perlite use temperature is less than 1000 ℃, easily forms low melting point phase with clay, aluminum phosphate reactant; In the field of the invention, have load larrying member, can not meet the requirement of use, and perlite intensity is low, the easy efflorescence of fiber.Application number is the patent documentation of KR19920008767, and the composition that it discloses a kind of insulating brick, comprising: coal dust, 10-60%; Diatomite, 10-40%; Wilkinite or clay, 20-30%; Perlite, 10-20%; Honey, 1-3%; Wood chip, lower than 40 liters; Water, 20-30%; Its dry, compression is fired 50-60 minute at 850-950 ℃.The deficiency of its existence is that such product density is low equally, and intensity is little, can not meet the requirement of use, and perlite intensity is low, and diatomite refractoriness is lower than 1000 ℃, and use temperature is lower than the application requiring of this art.
Summary of the invention
The invention reside in the insulating refractory intensity existing for prior art low, heat-proof quality is bad, heat resistanceheat resistant destructive characteristics is poor, the deficiency of easy efflorescence in use, provide a kind of intensity to be at least 4MPa, anti-thermal shock stability reaches more than 5 times, reduces light fire brick of the powder phenomenon-tion in use procedure and preparation method thereof.
Realize the measure of above-mentioned purpose:
A light fire brick, its constitutive material and weight percent content are: granularity is floated pearl in the plastic hollow ball of 2 ~ 0.5mm or flyash: 3 ~ 15%, the clay powder of granularity≤0.088mm: 3 ~ 90%; The alumine powder of granularity≤0.088mm: 0 ~ 90%, the aquamaine stone flour of granularity≤0.1mm: 3 ~ 8%, wilkinite: 1 ~ 4%, aluminium dihydrogen phosphate: 0 ~ 5%, tripoly phosphate sodium STPP: 0.01 ~ 0.5%.
It is characterized in that: described plastic hollow ball is for going back waste plastic preparation.
A kind of prepare light fire brick method, its step:
1) first float pearl, aluminium dihydrogen phosphate, wilkinite in the plastic hollow ball of 2 ~ 0.5mm or flyash are mixed, and standing 0.2 ~ 24 hour;
2) compound of step 1) is mixed with clay powder, alumine powder, aquamaine stone flour, tripoly phosphate sodium STPP, and clear up and be not less than 20 hours;
3) according to 0.1 ~ 2% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 5 ~ 9% and mix; Compression moulding;
4) in temperature, be to dry at 100 ~ 120 ℃, be not less than 20 hours time of drying, then at 1200 ~ 1300 ℃, burns till stand-by.
The effect of each raw material and master operation in the present invention:
Granularity is floated pearl in the plastic hollow ball of 2 ~ 0.5mm or flyash: for light fire brick provides pore opening and the quantity of setting, to reach predetermined effect of heat insulation.
The clay powder of granularity≤0.088mm: certain bonding strength is provided, makes light material be mixed with certain plasticity.
The alumine powder of granularity≤0.088mm: increase the fire performance of light cinder brick, improve use temperature.
The aquamaine stone flour of granularity≤0.1mm: increase the expansion of light cinder brick, offset the contraction in sintering process.
Wilkinite: certain bonding strength is provided, makes light material be mixed with certain plasticity.
Aluminium dihydrogen phosphate: bonding agent, the bonding strength of increase light cinder brick.
Tripoly phosphate sodium STPP: dispersion agent, homogeneity and the bonding strength of increase light cinder brick.
Why first float pearl, aluminium dihydrogen phosphate, wilkinite in the plastic hollow ball of 2 ~ 0.5mm or flyash are mixed, and standing 0.2 ~ 24 hour, its reason is that the overreaction that prevents aluminium dihydrogen phosphate makes compound foaming.
Again the compound of step 1) is mixed with clay powder, alumine powder, aquamaine stone flour, tripoly phosphate sodium STPP afterwards, and clear up and be not less than 20 hours, its reason: increase the homogeneity of material, prevent overplumping.
Compared with prior art, the intensity of brick is through after 110 ℃ of dry 24h in the present invention, and its intensity is not less than 4MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, at least 5 times without large crackle and destruction, has reduced the powder phenomenon-tion in use procedure, also helps reduction energy consumption.
Embodiment
Below the present invention is described in detail:
Embodiment 1
A light fire brick, its constitutive material and weight percent content are: granularity is at the plastic hollow ball of 2 ~ 0.5mm: 3%, the clay powder of granularity≤0.088mm: 85%; The alumine powder of granularity≤0.088mm: 6.5%, the aquamaine stone flour of granularity≤0.1mm: 4%, wilkinite: 1%, aluminium dihydrogen phosphate: 0.4%, tripoly phosphate sodium STPP: 0.1%.
Preparation process:
1) first by granularity the plastic hollow ball of 2 ~ 0.5mm 3%, aluminium dihydrogen phosphate 0.4% and wilkinite 1% mix, and standing 0.5 hour;
2) compound of step 1) is mixed with clay powder 85%, alumine powder 6.5%, aquamaine stone flour 4% and tripoly phosphate sodium STPP 0.1%, and clear up 22 hours;
3) according to 2% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 6% and mix; Compression moulding;
4) in temperature, be to dry at 110 ℃, be 22 hours time of drying, then at 1250 ℃, burns till stand-by.
Prepared refractory brick is after 110 ℃ are dried 24 hours, and its intensity reaches 3.8MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, and 6 times without destroying.
Embodiment 2
A light fire brick, its constitutive material and weight percent content are: granularity is at the plastic hollow ball of 2 ~ 0.5mm: 15%, the clay powder of granularity≤0.088mm: 76%; The alumine powder of granularity≤0.088mm: 0%, the aquamaine stone flour of granularity≤0.1mm: 3.5%, wilkinite: 3%, aluminium dihydrogen phosphate: 2.45%, tripoly phosphate sodium STPP: 0.05%.
Preparation process:
1) first by granularity the plastic hollow ball of 2 ~ 0.5mm 15%, aluminium dihydrogen phosphate 2.45% and wilkinite 3% mix, and standing 1 hour;
2) compound of step 1) is mixed with clay powder 76%, aquamaine stone flour 3.5% and tripoly phosphate sodium STPP 0.05, and clear up 24 hours;
3) according to 0.3% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 5% and mix; Compression moulding;
4) in temperature, be to dry at 115 ℃, be 21 hours time of drying, then at 1300 ℃, burns till stand-by.
Prepared refractory brick is after 110 ℃ are dried 24 hours, and its intensity reaches 4.2MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, and 5 times without destroying.
Embodiment 3
A light fire brick, its constitutive material and weight percent content are: granularity is floated pearl in the flyash of 2 ~ 0.5mm: 10%, the clay powder of granularity≤0.088mm: 3%; The alumine powder of granularity≤0.088mm: 74.7%, the aquamaine stone flour of granularity≤0.1mm: 6%, wilkinite: 2.3%, aluminium dihydrogen phosphate: 3.5%, tripoly phosphate sodium STPP: 0.5%.
Preparation process:
1) first by granularity, float pearl 10%, aluminium dihydrogen phosphate 3.5% and the wilkinite 2.3% in the flyash of 2 ~ 0.5mm mixes, and standing 0.6 hour;
2) compound of step 1) is mixed with clay powder 3%, aquamaine stone flour 3.5%, alumine powder 74.7% and tripoly phosphate sodium STPP 0.5%, and clear up 24.5 hours;
3) according to 0.1% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 7% and mix; Compression moulding;
4) in temperature, be to dry at 120 ℃, be 21.5 hours time of drying, stand-by.
Prepared refractory brick is after 110 ℃ are dried 24 hours, and its intensity reaches 5.3MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, and 7 times without destroying.
Embodiment 4
A light fire brick, its constitutive material and weight percent content are: granularity is floated pearl in the flyash of 2 ~ 0.5mm: 6%, the clay powder of granularity≤0.088mm: 18%; The alumine powder of granularity≤0.088mm: 62%, the aquamaine stone flour of granularity≤0.1mm: 8%, wilkinite: 1.8%, aluminium dihydrogen phosphate: 4%, tripoly phosphate sodium STPP: 0.2%.
Preparation process:
1) first by granularity, float pearl 6%, aluminium dihydrogen phosphate 4% and the wilkinite 1.8% in the flyash of 2 ~ 0.5mm mixes, and standing 0.8 hour;
2) compound of step 1) is mixed with clay powder 18%, aquamaine stone flour 8%, alumine powder 62% and tripoly phosphate sodium STPP 0.2%, and clear up 24.7 hours;
3) according to 1.5% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 9% and mix; Compression moulding;
4) in temperature, be to dry at 110 ℃, be 23 hours time of drying, then at 1280 ℃, burns till stand-by.
Prepared refractory brick is after 110 ℃ are dried 24 hours, and its intensity reaches 7.5MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, and 8 times without destroying.
Embodiment 5
A light fire brick, its constitutive material and weight percent content are: granularity is at the waste plastic hollow ball of 2 ~ 0.5mm: 8%, the clay powder of granularity≤0.088mm: 32%; The alumine powder of granularity≤0.088mm: 51%, the aquamaine stone flour of granularity≤0.1mm: 5.08%, wilkinite: 3.9%, aluminium dihydrogen phosphate: 0%, tripoly phosphate sodium STPP: 0.02%.
Preparation process:
1) first by granularity, plastic hollow ball 8%, aluminium dihydrogen phosphate 0% and the wilkinite 3.9% at 2 ~ 0.5mm mixes, and standing 1.2 hours;
2) compound of step 1) is mixed with clay powder 32%, aquamaine stone flour 5.08%, alumine powder 51% and tripoly phosphate sodium STPP 0.02%, and clear up 25 hours;
3) according to 2% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 8.5% and mix; Compression moulding;
4) in temperature, be to dry at 115 ℃, be 24 hours time of drying, then at 1250 ℃, burns till stand-by.
Prepared refractory brick is after 110 ℃ are dried 24 hours, and its intensity reaches 5.3MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, and 9 times without destroying.
Embodiment 6
A light fire brick, its constitutive material and weight percent content are: granularity is at the waste plastic hollow ball of 2 ~ 0.5mm: 12%, the clay powder of granularity≤0.088mm: 45%; The alumine powder of granularity≤0.088mm: 38%, the aquamaine stone flour of granularity≤0.1mm: 3%, wilkinite: 1.5%, aluminium dihydrogen phosphate: 0.2%, tripoly phosphate sodium STPP: 0.3%.
Preparation process:
1) first by granularity, plastic hollow ball 12%, aluminium dihydrogen phosphate 0.2% and the wilkinite 1.5% at 2 ~ 0.5mm mixes, and standing 1.6 hours;
2) compound of step 1) is mixed with clay powder 45%, aquamaine stone flour 3%, alumine powder 38% and tripoly phosphate sodium STPP 0.3%, and clear up 24.8 hours;
3) according to 1.8% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 8% and mix; Compression moulding;
4) in temperature, be to dry at 110 ℃, be 24.5 hours time of drying, then 1200, burns till stand-by.
Prepared refractory brick is after 110 ℃ are dried 24 hours, and its intensity reaches 6.1MPa, 1000 ℃ of air-cooled anti-thermal shock good stabilities, and 8 times without destroying.
Above-described embodiment only exemplifies for the best, and is not the restriction to embodiments of the present invention.
Claims (3)
1. a light fire brick, its constitutive material and weight percent content are: granularity is floated pearl in the plastic hollow ball of 2 ~ 0.5mm or flyash: 3 ~ 15%, the clay powder of granularity≤0.088mm: 3 ~ 90%; The alumine powder of granularity≤0.088mm: 0 ~ 90%, the aquamaine stone flour of granularity≤0.1mm: 3 ~ 8%, wilkinite: 1 ~ 4%, aluminium dihydrogen phosphate: 0 ~ 5%, tripoly phosphate sodium STPP: 0.01 ~ 0.5%.
2. a kind of light fire brick as claimed in claim 1, is characterized in that: described plastic hollow ball is also waste plastic preparation.
3. prepare the method for a kind of light fire brick claimed in claim 1, its step:
1) first float pearl, aluminium dihydrogen phosphate, wilkinite in the duroplasts hollow ball of 2 ~ 0.5mm or flyash are mixed, and standing 0.2 ~ 24 hour;
2) compound of step 1) is mixed with clay powder, alumine powder, aquamaine stone flour, tripoly phosphate sodium STPP, and clear up and be not less than 20 hours;
3) according to 0.1 ~ 2% of the total weight percent of added total raw material compound, add the water of sulfonated lignin and 5 ~ 9% and mix; Compression moulding;
4) in temperature, be to dry at 100 ~ 120 ℃, be not less than 20 hours time of drying, then at 1200 ~ 1300 ℃, burns till stand-by.
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| CN201310626786.3A CN103693974B (en) | 2013-12-02 | 2013-12-02 | Lightweight heat-insulating fire brick and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631063A (en) * | 2016-12-19 | 2017-05-10 | 马鞍山豹龙新型建材有限公司 | Molten slag corrosion-resistant refractory brick and preparation method thereof |
| CN107500791A (en) * | 2017-09-27 | 2017-12-22 | 宿州市埇桥区三八街道九里村兴农服务有限公司 | A kind of light fire brick and its production method |
| CN108285358A (en) * | 2017-12-15 | 2018-07-17 | 景德镇陶瓷大学 | The expansion material increasing method of pore diameter of porous ceramics |
| CN108997026A (en) * | 2018-09-19 | 2018-12-14 | 山东潍耐节能材料有限公司 | A kind of strong lightweight thermal insulation brick of roaster superelevation and preparation method thereof |
| CN114057508A (en) * | 2021-08-26 | 2022-02-18 | 朱建良 | Low-aluminum high-porosity porous ceramic material and preparation method thereof |
| CN117401989A (en) * | 2023-10-24 | 2024-01-16 | 邹平金石节能科技有限公司 | Aluminum silicate light refractory brick and preparation method thereof |
Citations (2)
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|---|---|---|---|---|
| JPS6090874A (en) * | 1983-10-20 | 1985-05-22 | 川崎炉材株式会社 | Plastic refractories |
| CN102765954A (en) * | 2012-08-10 | 2012-11-07 | 萍乡市科兴窑炉材料有限公司 | Water system press-in grouting material used for iron making hot blast heater system and preparation method thereof |
-
2013
- 2013-12-02 CN CN201310626786.3A patent/CN103693974B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090874A (en) * | 1983-10-20 | 1985-05-22 | 川崎炉材株式会社 | Plastic refractories |
| CN102765954A (en) * | 2012-08-10 | 2012-11-07 | 萍乡市科兴窑炉材料有限公司 | Water system press-in grouting material used for iron making hot blast heater system and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631063A (en) * | 2016-12-19 | 2017-05-10 | 马鞍山豹龙新型建材有限公司 | Molten slag corrosion-resistant refractory brick and preparation method thereof |
| CN107500791A (en) * | 2017-09-27 | 2017-12-22 | 宿州市埇桥区三八街道九里村兴农服务有限公司 | A kind of light fire brick and its production method |
| CN108285358A (en) * | 2017-12-15 | 2018-07-17 | 景德镇陶瓷大学 | The expansion material increasing method of pore diameter of porous ceramics |
| CN108997026A (en) * | 2018-09-19 | 2018-12-14 | 山东潍耐节能材料有限公司 | A kind of strong lightweight thermal insulation brick of roaster superelevation and preparation method thereof |
| CN114057508A (en) * | 2021-08-26 | 2022-02-18 | 朱建良 | Low-aluminum high-porosity porous ceramic material and preparation method thereof |
| CN117401989A (en) * | 2023-10-24 | 2024-01-16 | 邹平金石节能科技有限公司 | Aluminum silicate light refractory brick and preparation method thereof |
| CN117401989B (en) * | 2023-10-24 | 2024-03-05 | 邹平金石节能科技有限公司 | Aluminum silicate light refractory brick and preparation method thereof |
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| CN103693974B (en) | 2015-01-07 |
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Effective date of registration: 20170711 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
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