CN104671824A - Method for preparing light foamed ceramic heat insulating material by using coal gangue - Google Patents
Method for preparing light foamed ceramic heat insulating material by using coal gangue Download PDFInfo
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- CN104671824A CN104671824A CN201510061312.8A CN201510061312A CN104671824A CN 104671824 A CN104671824 A CN 104671824A CN 201510061312 A CN201510061312 A CN 201510061312A CN 104671824 A CN104671824 A CN 104671824A
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- foamed ceramic
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- coal gangue
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- ceramic lagging
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Abstract
The invention relates to a method for preparing a light foamed ceramic heat insulating material by using coal gangue. The technical problems that the existing heat insulating material is high in price, large in volume weight, large in water-absorption, easy to pulverize, relatively bad in compressive resistance and bad in water resistance are well solved. The method comprises the following steps: by using the coal gangue as the raw material, doping a certain mass of mineral materials and chemical materials, carrying out ball milling and mixing, spraying and granulating, filling a die, carrying out high-temperature sintering at 1150-1250 DEG.C to prepare the light foamed ceramic heat insulating material, wherein the volume weight of the material is 300-500kg/m<3>, the heat conducting coefficient is 0.06-0.15w/(m.k), the compressive strength is 3-12MPa. The light foamed ceramic heat insulating material prepared by the method disclosed by the invention is small in volume weight, low in heat conducting coefficient, high in compressive strength, excellent in heat thermal insulation property and excellent in fire resistance, and can be prepared as an external heat insulating wall body, a partition wall and an acoustic barrier.
Description
Technical field
The present invention relates to a kind of method utilizing coal gangue to prepare light foamed ceramic lagging material, belong to material of construction manufacture and applied technical field.
Background technology
China's accumulation coal gangue reaches more than 1,000,000,000 tons according to statistics, also will discharge coal gangue 100,000,000 tons every year.Sulfide effusion in coal gangue or leaching meeting atmosphere pollution, farmland and water body.Waste dump also can spontaneous combustion presence of fire, or in avalanche in rainy season, silts river up and cause disaster.In order to decontamination, from the sixties, a lot of country starts the disposal and utilization paying attention to coal gangue.Up to the present, coal gangue utilize dynamics large not enough.Technology imperfection, regional development is uneven, still very serious on the impact of environment.
There is following problem in current various lagging material: glass wool in actual use, is not suitable for directly using and glass silk flosssilk wadding plate flexible type, non-anti-extrusion, water-fast; The cost that aluminum silicate fiber exists pure aluminium silicate is high, and compressive resistance is poor, easily produces dust, and water resistance is not so good; Hard class insulating product price is high, water-absorbent is large, easily efflorescence, and addition material is many, easily causes the phenomenons such as the low and hollowing cracking of product later strength; Foamed concrete thermal conductivity is higher, poor thermal insulation property, and unit weight is high, and load-bearing property is not as good as other wall insulated boards; Aerogel is difficult to the bottleneck that the shortcomings such as the low strength overcome, high fragility and complex manufacturing become its widespread use of restriction due to the preparation cost of aerogel costliness, material itself.For this reason, people are seeking always and are studying a kind of lagging material that greatly can improve coal gangue rate of utilization and superior performance.
Summary of the invention
The present invention is for the purpose of solving the problem, mainly solve that the cost that existing lagging material exists is high, heat-insulating property is good not, intensity is low, the technical problem of yielding and complex manufacturing, and provide a kind of raw material sources extensive, excellent thermal insulation performance and the coal gangue that utilizes of economic environmental protection prepares the method for light foamed ceramic lagging material.
For achieving the above object, the present invention adopts following technical proposals: a kind of method utilizing coal gangue to prepare light foamed ceramic lagging material, main is raw material with coal gangue, the raw mineral materials of admixture certain mass and industrial chemicals, obtained light foamed ceramic lagging material after ball milling combination treatment, mist projection granulating, die-filling, 1150 ~ 1250 DEG C of high temperature sinterings, its unit weight is at 300 ~ 500kg/m
3, thermal conductivity is at 0.06 ~ 0.15w/ (mk), and ultimate compression strength is 3 ~ 12MPa.
Concrete grammar is realized by following processing step:
(1) coal gangue and raw mineral materials, industrial chemicals are prepared burden by mass percentage, wherein coal gangue, raw mineral materials, industrial chemicals weigh various feed composition with the ratio of 85% ~ 95%:3% ~ 14%:1% ~ 5% and add in ball mill, add afterwards and account for
materialthe water of total mass 40 ~ 65%, after ball-milling processing 4h, slip crosses 80 mesh sieves.
(2) slip obtained in step (1) is carried out mist projection granulating process, afterwards granulation material is put into the mould combined, mold material is cordierite-mullite material.
(3) by the mould arranged in step (2) and wait burn material put into kiln, 1150 ~ 1250 DEG C of high temperature burn till rear obtained novel high-strength light foamed ceramic lagging material.
Above-mentioned raw mineral materials adopt in white carbon black, magnesia, calcium magnesia sand one or more; Industrial chemicals adopt in soda ash, Xylo-Mucine or water glass one or more; Ball-milling medium ball is middle aluminium ball, and the volume ratio of ball and material is 1:2 ~ 3.
Beneficial effect of the present invention and feature: the present invention solves the series of technical such as the unit weight that existing novel wall material exists is large, energy-saving heat preserving poor effect preferably.The light foamed ceramic lagging material unit weight adopting present method obtained is little, thermal conductivity is low, ultimate compression strength is high, excellent thermal insulation performance, fire resistance are good, there is very high security, take full advantage of Coal Gangue Resource, improve the recycling of solid waste, there is good economic worth and the value of environmental protection.
Embodiment
Embodiment one:
Take 4.25kg coal gangue, 0.4kg white carbon black, 0.25kg magnesia, 0.05kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 2.6kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, about 1150 DEG C high temperature burn till rear obtained light foamed ceramic lagging material.
Obtained light foamed ceramic lagging material unit weight is 450kg/m
3, thermal conductivity is at 0.10w/ (mk), and ultimate compression strength is 7.5MPa.
Embodiment two:
Take 4.3kg coal gangue, 0.25kg white carbon black, 0.25kg magnesia, 0.075kg calcium magnesia sand, 0.025kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 2.8kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, 1180 DEG C of high temperature burn till rear obtained light foamed ceramic lagging material.
Obtained light foamed ceramic lagging material unit weight is 400kg/m
3, thermal conductivity is at 0.10w/ (mk), and ultimate compression strength is 6.2MPa.
Embodiment three:
Take 4.5kg coal gangue, 0.25kg white carbon black, 0.15kg calcium magnesia sand, 0.05kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 3kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, about 1200 DEG C high temperature burn till rear obtained light foamed ceramic lagging material.
Obtained light foamed ceramic lagging material unit weight is 350kg/m
3, thermal conductivity is at 0.09w/ (mk), and ultimate compression strength is 4.0MPa.
Embodiment four:
Take 4.7kg coal gangue, 0.1kg white carbon black, 0.1kg magnesia, 0.1kg calcium magnesia sand, 0.05kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 3.2kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, about 1250 DEG C high temperature burn till rear obtained light foamed ceramic lagging material.
Obtained light foamed ceramic lagging material unit weight is 310kg/m
3, thermal conductivity is at 0.08w/ (mk), and ultimate compression strength is 3.5MPa.
The light foamed ceramic lagging material adopting aforesaid method to prepare, can make external heat insulating wall, division wall and soundproof wall etc.
Claims (7)
1. the method utilizing coal gangue to prepare light foamed ceramic lagging material, the method is mainly raw material with coal gangue, the raw mineral materials of admixture certain mass and industrial chemicals, obtained light foamed ceramic lagging material after ball milling combination treatment, mist projection granulating, die-filling, 1150 ~ 1250 DEG C of high temperature sinterings, its unit weight is at 300 ~ 500kg/m
3, thermal conductivity is at 0.06 ~ 0.15w/ (mk), and ultimate compression strength is 3 ~ 12MPa.
2. utilize coal gangue to prepare the method for light foamed ceramic lagging material as claimed in claim 1, realized by following processing step:
(1) coal gangue and raw mineral materials, industrial chemicals are prepared burden by mass percentage, wherein coal gangue, raw mineral materials, industrial chemicals weigh various feed composition with the ratio of 85% ~ 95%:3% ~ 14%:1% ~ 5% and add in ball mill, add the water accounting for material total mass 40 ~ 65% afterwards, after ball-milling processing 4h, slip crosses 80 mesh sieves;
(2) slip obtained in step (1) is carried out mist projection granulating process, afterwards granulation material is put into the mould combined, mold material is cordierite-mullite material;
(3) by the mould arranged in step (2) and wait burn material put into kiln, 1150 ~ 1250 DEG C of high temperature burn till rear obtained novel high-strength light foamed ceramic lagging material;
Above-mentioned raw mineral materials adopt in white carbon black, magnesia, calcium magnesia sand one or more; Industrial chemicals adopt in soda ash, Xylo-Mucine or water glass one or more; Ball-milling medium ball is middle aluminium ball, and the volume ratio of ball and material is 1:2 ~ 3.
3. utilize coal gangue to prepare the method for light foamed ceramic lagging material as claimed in claim 2, realized by following concrete technology step:
Take 4.25kg coal gangue, 0.4kg white carbon black, 0.25kg magnesia, 0.05kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 2.6kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, about 1150 DEG C high temperature burn till rear obtained light foamed ceramic lagging material, obtained light foamed ceramic lagging material unit weight is 450kg/m
3, thermal conductivity is at 0.14w/ (mk), and ultimate compression strength is 7.5MPa.
4. utilize coal gangue to prepare the method for light foamed ceramic lagging material as claimed in claim 2, realized by following concrete technology step:
Take 4.3kg coal gangue, 0.25kg white carbon black, 0.25kg magnesia, 0.075kg calcium magnesia sand, 0.025kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 2.8kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, 1180 DEG C of high temperature burn till rear obtained light foamed ceramic lagging material, obtained light foamed ceramic lagging material unit weight is 400kg/m
3, thermal conductivity is at 0.13w/ (mk), and ultimate compression strength is 6.3MPa.
5. utilize coal gangue to prepare the method for light foamed ceramic lagging material as claimed in claim 2, realized by following concrete technology step:
Take 4.5kg coal gangue, 0.25kg white carbon black, 0.15kg calcium magnesia sand, 0.05kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 3kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, about 1200 DEG C high temperature burn till rear obtained light foamed ceramic lagging material, obtained light foamed ceramic lagging material unit weight is 350kg/m
3, thermal conductivity is at 0.125w/ (mk), and ultimate compression strength is 5.4MPa.
6. utilize coal gangue to prepare the method for light foamed ceramic lagging material as claimed in claim 2, realized by following concrete technology step:
Take 4.7kg coal gangue, 0.1kg white carbon black, 0.1kg magnesia, 0.1kg calcium magnesia sand, 0.05kg soda ash, 0.025kg Xylo-Mucine, 0.025kg water glass, add water after above material is loaded ball grinder 3.2kg, ball-milling processing 4h, control agent ball with treat that grind materials volume ratio is 1:2.5, afterwards slip was taken out 80 mesh sieves, afterwards mist projection granulating is carried out to slip, granulation material is put into the cordierite-mullite material mould combined, by mould and wait burn material be placed in kiln, about 1250 DEG C high temperature burn till rear obtained light foamed ceramic lagging material, obtained light foamed ceramic lagging material unit weight is 310kg/m
3, thermal conductivity is at 0.11w/ (mk), and ultimate compression strength is 4.8MPa.
7. the coal gangue that utilizes as described in Claims 2 or 3 or 4 or 5 or 6 prepares the method for light foamed ceramic lagging material, and the light foamed ceramic lagging material adopting aforesaid method to prepare, can make external heat insulating wall, division wall and soundproof wall.
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| CN201510061312.8A CN104671824B (en) | 2015-02-06 | 2015-02-06 | A kind of method utilizing gangue to prepare light foamed ceramic insulation material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151701A (en) * | 2020-01-07 | 2020-05-15 | 山西超牌煅烧高岭土有限公司 | Method for producing Mullica sand by using coal gangue |
| CN111499402A (en) * | 2020-04-21 | 2020-08-07 | 中国科学院合肥物质科学研究院 | High-temperature-resistant, high-strength and light-weight heat-insulating material and preparation method thereof |
| CN113387720A (en) * | 2021-07-08 | 2021-09-14 | 河南省高新技术实业有限公司 | Foamed ceramic thermal insulation material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102010180A (en) * | 2009-09-08 | 2011-04-13 | 华东理工大学 | Solar heat reflective heat insulating and preserving foaming ceramic material and manufacturing method thereof |
| CN102964143A (en) * | 2012-11-29 | 2013-03-13 | 山西安晟科技发展有限公司 | Method for preparing foamed ceramic insulation board by waste glass ceramic wafer |
| CN103387414A (en) * | 2013-08-16 | 2013-11-13 | 陈世友 | Closed-cell foamed ceramic insulation board and preparation method thereof |
| CN103553699A (en) * | 2013-10-25 | 2014-02-05 | 东北大学 | Method for preparing foam heat-insulating material from barren coal gangue industrial waste |
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2015
- 2015-02-06 CN CN201510061312.8A patent/CN104671824B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010180A (en) * | 2009-09-08 | 2011-04-13 | 华东理工大学 | Solar heat reflective heat insulating and preserving foaming ceramic material and manufacturing method thereof |
| CN102964143A (en) * | 2012-11-29 | 2013-03-13 | 山西安晟科技发展有限公司 | Method for preparing foamed ceramic insulation board by waste glass ceramic wafer |
| CN103387414A (en) * | 2013-08-16 | 2013-11-13 | 陈世友 | Closed-cell foamed ceramic insulation board and preparation method thereof |
| CN103553699A (en) * | 2013-10-25 | 2014-02-05 | 东北大学 | Method for preparing foam heat-insulating material from barren coal gangue industrial waste |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151701A (en) * | 2020-01-07 | 2020-05-15 | 山西超牌煅烧高岭土有限公司 | Method for producing Mullica sand by using coal gangue |
| CN111151701B (en) * | 2020-01-07 | 2021-08-06 | 山西超牌煅烧高岭土有限公司 | Method for producing Mullica sand by using coal gangue |
| CN111499402A (en) * | 2020-04-21 | 2020-08-07 | 中国科学院合肥物质科学研究院 | High-temperature-resistant, high-strength and light-weight heat-insulating material and preparation method thereof |
| CN111499402B (en) * | 2020-04-21 | 2022-03-11 | 中国科学院合肥物质科学研究院 | High-temperature-resistant, high-strength and light-weight heat-insulating material and preparation method thereof |
| CN113387720A (en) * | 2021-07-08 | 2021-09-14 | 河南省高新技术实业有限公司 | Foamed ceramic thermal insulation material and preparation method thereof |
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| CN104671824B (en) | 2016-09-14 |
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