Coal gangue pottery sand and method for preparing same

A technology of coal gangue and pottery sand, which is applied to ceramic products, other household appliances, sustainable waste treatment, etc., can solve the problem of high foaming temperature, and achieve the effects of lowering foaming temperature, reducing multiple pollution and strengthening thermal insulation effect.

Active Publication Date: 2012-09-19
北京建工华创科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the problem that the foaming temperature is too high when using coal gangue to prepare lightweight materials in the prior art, so as to provide a foaming process that can be performed at a lower temperature and has a lower density. Coal gangue pottery sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Coal gangue pottery sand of the present invention is prepared by the following components by weight:

[0034] 30 parts of coal gangue, 70 parts of glass powder, 5 parts of a mixture of sodium carbonate and calcium carbonate, and 10 parts of water glass.

[0035] Above-mentioned coal gangue pottery sand is prepared by following method:

[0036] (1) Take the mixture of coal gangue, glass powder and sodium carbonate and calcium carbonate according to the selected parts by weight, mix uniformly, and grind to a particle size of more than 400 mesh;

[0037] (2) Mix the above-mentioned prepared granules with water glass evenly, and granulate on a disc granulator to form a ceramic sand green body;

[0038] (3) drying and drying the made ceramic sand body until the moisture content is lower than 0.005%;

[0039] (4) Baking and foaming the dried ceramic sand body at 760-850° C., and grading and sieving to obtain the product.

[0040] The gangue pottery sand particle diameter t...

Embodiment 2

[0042] Coal gangue pottery sand of the present invention is prepared by the following components by weight:

[0043] 70 parts of coal gangue, 20 parts of glass powder, 10 parts of dolomite foaming agent, 25 parts of water glass, and 10 parts of glass powder as a dispersant.

[0044] Above-mentioned coal gangue pottery sand is prepared by following method:

[0045] (1) Take coal gangue, glass powder and dolomite foaming agent according to selected weight parts respectively and mix uniformly, and grind to the powder grain that particle diameter is more than 400 orders;

[0046] (2) Mix the above-mentioned prepared granules with water glass evenly, and granulate on a disc granulator to form a ceramic sand body; and disperse 10 parts of coated glass powder on the outer surface of the made ceramic sand body, The moisture content of the outer surface of the ceramic sand green body is further reduced;

[0047] (3) drying and drying the ceramic sand green body coated with the disper...

Embodiment 3

[0051] Coal gangue pottery sand of the present invention is prepared by the following components by weight:

[0052] 45 parts of coal gangue, 50 parts of glass powder, 8 parts of calcium carbonate, 15 parts of water glass, and 5 parts of kaolin as a dispersant.

[0053] Above-mentioned coal gangue pottery sand is prepared by following method:

[0054] (1) Take coal gangue, glass powder and sodium carbonate according to selected weight parts, mix uniformly respectively, and grind to the granules whose particle diameter is more than 400 mesh;

[0055] (2) Mix the above-mentioned prepared powder and water glass evenly, and granulate on a disc granulator to form a ceramic sand body; and disperse and coat 5 parts of kaolin on the outer surface of the made ceramic sand body, so that The moisture content of the outer surface of the ceramic sand green body is further reduced;

[0056] (3) drying and drying the made ceramic sand body until the moisture content is lower than 0.005%; ...

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Abstract

The invention belongs to the field of preparation of building materials, and particularly relates to a method for preparing light and fireproof pottery sand by using coal mining solid waste, namely coal gangue. The coal gangue pottery sand is prepared from the following components in part by weight: 30 to 70 parts of coal gangue, 20 to 70 parts of glass powder, 2 to 10 parts of foaming agent and 10 to 25 parts of binding agent. The coal gangue pottery sand is prepared from the glass powder used as the raw material, the foaming temperature in a foaming step can be reduced greatly by using the high dispersibility of the glass powder, and the coal gangue pottery sand has the characteristic of porosity, so that the pottery sand is good in heat insulation effect; the bulk density of the prepared coal gangue pottery sand is leas than 650kg/<3>, so that the coal gangue pottery sand is light in weight; and the thermal coefficient of the coal gangue pottery sand is less than 0.15W/(m.K), so that the coal gangue pottery sand is strong in heat insulation effect.

Description

technical field [0001] The invention belongs to the field of building material preparation, and in particular relates to a light-weight, fireproof pottery sand prepared by using coal mining solid waste coal gangue and a preparation method thereof. Background technique [0002] China is a developing country that uses coal as its main energy source. Coal accounts for more than 70% of primary energy consumption, more than twice the world average. The energy structure is still dominated by coal. Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. Including the excavation gangue during the roadway excavation, the gangue extracted from the roof, floor and interlayer during the mining process, and the gangue picked out during the coal washing process. Its main component is Al 2 o 3 , SiO 2 , also c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/26C04B18/12
CPCY02W30/91
Inventor 周华林钟天成
Owner 北京建工华创科技发展股份有限公司
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