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Method for preparing foam heat-insulating material from barren coal gangue industrial waste

A foam insulation material and industrial waste technology, applied in the field of building materials, can solve the problems of difficult utilization, high silicon content of barren coal gangue, low plasticity index, etc. Effect

Inactive Publication Date: 2015-04-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Barren coal gangue has high silicon content and low plasticity index, making it difficult to utilize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Crush the infertile gangue until it passes through a 18-mesh sieve, and the particle size is below 1mm. Mix it with ceramic polished brick mud according to the weight ratio of barren gangue:ceramic polished brick mud=2:1, and stir evenly to obtain a mixture. Material A;

[0022] (2) Add water glass and sodium lauryl sulfate to the above-mentioned mixture A respectively to obtain mixture B. The amount of water glass added is 8% of the total weight of infertile coal gangue and ceramic polished brick mud, and lauryl sulfuric acid The amount of sodium added is 8% of the total weight of barren coal gangue and ceramic polished brick mud;

[0023] (3) Add water to the mixture B and stir evenly. The amount of water added is 14% of the weight of the mixture B. After stirring evenly, place it under closed conditions for 48 hours to obtain the aged material;

[0024] (4) Put the aged material into the plate forming mold, press and form it under 3MPa pressure to obtain a forme...

Embodiment 2

[0027] (1) Crush the infertile coal gangue until it passes through a 18-mesh sieve, and the particle size is below 1 mm. Mix it with ceramic polished brick mud according to the weight ratio of barren gangue:ceramic polished brick mud = 1.5:1, and stir evenly to obtain a mixture. Material A;

[0028] (2) Add water glass and sodium lauryl sulfate to the above-mentioned mixture A respectively to obtain mixture B. The amount of water glass added is 6% of the total weight of infertile coal gangue and ceramic polished brick mud, and lauryl sulfuric acid The amount of sodium added is 9% of the total weight of barren coal gangue and ceramic polished brick mud;

[0029] (3) Add water to the mixture B and stir evenly. The amount of water added is 12% of the weight of the mixture B. After stirring evenly, place it under closed conditions for 48 hours to obtain the aged material;

[0030] (4) Put the aged material into a plate forming mold, press and form it under 2MPa pressure to obtain...

Embodiment 3

[0033] (1) Crush the barren gangue until it passes through a 18-mesh sieve, and the particle size is below 1mm. Mix it with ceramic polished brick mud according to the weight ratio of barren gangue:ceramic polished brick mud = 1:1, and stir evenly to obtain a mixture. Material A;

[0034] (2) Add water glass and sodium lauryl sulfate to the above-mentioned mixture A respectively to obtain mixture B. The amount of water glass added is 4% of the total weight of infertile coal gangue and ceramic polished brick mud, and lauryl sulfuric acid The amount of sodium added is 10% of the total weight of barren coal gangue and ceramic polished brick mud;

[0035] (3) Add water to the mixture B and stir evenly. The amount of water added is 10% of the weight of the mixture B. After stirring evenly, place it under closed conditions for 48 hours to obtain the aged material;

[0036] (4) Put the aged material into a plate forming mold, press and form it under a pressure of 1.5MPa to obtain a ...

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Abstract

The invention belongs to the field of building materials, and specifically relates to a method for preparing foam insulation materials from barren coal gangue industrial waste. The invention mixes infertile coal gangue and ceramic polished brick mud, adds water glass, sodium lauryl sulfate and water, stirs evenly, and then places it under closed conditions for 48 hours to obtain aged materials, which are then put into plates for molding. In the mold, press and mold under a pressure of 1.5~3MPa to obtain a formed plate. The formed plate is dried at 106°C until the quality is constant, and then placed in an electric furnace and heated to 1150~1250°C at a rate of 100~150°C / h. , keep it warm for 10 to 15 minutes, and then cool it naturally to obtain a barren coal gangue foam insulation material. The invention uses infertile coal gangue industrial waste, has easy-to-obtain raw materials and low production cost, and can effectively solve the problem of stacking and processing of coal gangue and ceramic polished brick mud. The thermal insulation material produced has excellent thermal conductivity, water absorption, combustion performance and Strength and other properties are in line with insulation material standards.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing a foam insulation material from barren coal gangue industrial waste. Background technique [0002] China is a big coal country, and the coal gangue produced every year exceeds 200 million tons. Coal gangue piles up like a mountain, occupies a lot of land and seriously affects the environment. It is imperative to use it as a large resource. Infertile coal gangue accounts for more than 60% of the total coal gangue, which is difficult to utilize due to its high silicon content and low plasticity index. With the acceleration of China's urbanization process and the implementation of energy-saving and emission-reduction industrial policies, the demand for new building materials has increased significantly, creating good conditions for the development of new energy-saving and thermal insulation building materials using coal gangue as raw materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B38/02
Inventor 邱景平邢军孙晓刚巩恩普冯慎明刘剑平李小庆刘骎梁健
Owner NORTHEASTERN UNIV LIAONING
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