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A kind of coal-based solid waste foam insulation material and preparation method thereof

A thermal insulation material, coal-based technology, applied in the field of building materials, can solve the problems of occupying cultivated land, environmental pollution, etc., and achieve the effect of reducing construction costs, reducing costs, and low thermal conductivity

Active Publication Date: 2018-07-17
DATANG INT HIGH ALUMINA COAL R & D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, a large amount of coal-based solid waste has been piled up, which not only occupies a large amount of arable land, but also brings serious environmental pollution problems, causing a large number of villages to be forced to relocate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The raw materials were weighed according to the following mass ratio: 45 parts of calcium silicate slag, 10 parts of fly ash, 30 parts of slag powder, 9 parts of cement clinker, 5 parts of desulfurized gypsum, and 1 part of additive.

[0029] Among the above raw materials, the main chemical composition of silicon-calcium slag is β-Ca 2 SiO 4 : 55~75%, Ca 3 al 2 o 6 : 10-25%, CaTiO 3 : 5~10%, Na 2 O: 1.5-3%. Fly ash, slag powder and desulfurized gypsum are all provided by Inner Mongolia Datang International Renewable Resources Development Co., Ltd. The specific surface area of ​​slag powder is 420m 2 / kg or so, the additive is potassium sulfate.

[0030] The preparation method of the coal-based solid waste foaming insulation material is as follows:

[0031] Burn the calcium-silicon slag above at about 600° C. for about 120 minutes to obtain the calcium-silicon slag after heat treatment.

[0032] Mix the above raw materials and grind them in a ball mill, so that t...

Embodiment 2

[0039] The raw materials were weighed according to the following mass ratio: 22 parts of calcium silicate slag, 22 parts of fly ash, 44 parts of slag powder, 6 parts of cement clinker, 5.7 parts of desulfurized gypsum, and 0.3 parts of additives.

[0040] Wherein, the above-mentioned silicon-calcium slag is according to the method described in Example 1 of the patent application CN103332710A (a method for pre-desilication of high-alumina fly ash to simultaneously reduce the alkali content), and the high-alumina fly ash is pre-desiliconized and used Calcium-silicate slag is a by-product obtained after alumina is extracted by soda lime sintering. Fly ash, slag powder and desulfurized gypsum are all provided by Inner Mongolia Datang International Renewable Resources Development Co., Ltd., and the specific surface area of ​​slag powder is 420m 2 / kg or so. The additive is sodium aluminate.

[0041] The preparation method of the coal-based solid waste foaming insulation material ...

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Abstract

The invention provides a coal-based solid waste foaming heat insulation material and a preparation method thereof. The coal-based solid waste foaming heat insulation material provided by the invention is prepared from a mixture of the following raw materials in parts by weight through foaming processing: 20 to 70 parts of silicon-calcium slag subjected to heat treatment, 5 to 40 parts of fly ash, 3 to 10 parts of desulfurized gypsum, 5 to 44 parts of slag powder, 3 to 15 parts of cement clinker and 0.2 to 3 parts of an additive. According to the coal-based solid waste foaming heat insulation material provided by the invention, coal-based solid wastes including the silicon-calcium slag, the fly ash, the desulfurized gypsum and the like can be absorbed on a large scale, and the prepared coal-based solid waste foaming heat insulation material has the properties of low density, high strength, low coefficient of thermal conductivity and the like, and meets standard requirements of a cement-based foam heat insulation board. The preparation method of the coal-based solid waste foaming heat insulation material, provided by the invention, is simple, molding and curing time is short, and the production efficiency is high.

Description

technical field [0001] The invention relates to a foaming thermal insulation material, in particular to a coal-based solid waste foaming thermal insulation material and a preparation method thereof, belonging to the field of building materials. Background technique [0002] Fly ash is the main solid waste discharged from large coal-fired thermal power plants. Calcium silicate slag is the main solid residue produced after alumina is extracted from fly ash. Desulfurization gypsum (flue gas desulfurization gypsum) is the main by-product obtained from the desulfurization and purification of flue gas produced by sulfur-containing fuels. Since my country uses coal as the main energy source, especially in the central and western parts of Inner Mongolia, large-scale thermal power plants use coal as fuel. Along with the transmission of electricity, about 12 million tons of high-alumina fly ash are emitted every year, and its stockpile over the years has exceeded 100 million tons. U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/10C04B18/04C04B18/08C04B18/14
CPCC04B28/00C04B2201/20C04B2201/32C04B2201/50C04B18/0481C04B18/08C04B18/141C04B22/145C04B22/147C04B22/08C04B22/068C04B38/106C04B22/0093Y02W30/91
Inventor 杨志杰孙俊民徐鹏陈杨
Owner DATANG INT HIGH ALUMINA COAL R & D CENT