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Method for using high-aluminium coal ash to synthesize composite xonotlite insulation material

A technology of composite thermal insulation material and high-alumina fly ash, which is applied in the direction of silicate, aluminum silicate, alkaline earth metal silicate, etc., can solve the problems of waste of resources, environmental pollution of high-alumina fly ash, etc., and achieve easy operation , good prospects for popularization and application, and low energy consumption

Active Publication Date: 2018-12-07
内蒙古中建亚太建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of environmental pollution and waste of resources in the existing high-alumina fly ash, and provide a method for synthesizing xonotlite composite insulation material with high-alumina fly ash. The method uses high-alumina fly ash As the main raw material, the method uses high-aluminum fly ash of industrial solid waste as the main raw material to prepare fireproof materials

Method used

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  • Method for using high-aluminium coal ash to synthesize composite xonotlite insulation material
  • Method for using high-aluminium coal ash to synthesize composite xonotlite insulation material
  • Method for using high-aluminium coal ash to synthesize composite xonotlite insulation material

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Effect test

Embodiment 1

[0025] The high-alumina fly ash used in this example was taken from a power plant in Hohhot, Inner Mongolia, and the quicklime was taken from Qingshuihe County, Hohhot, Inner Mongolia. The chemical composition is shown in Table 1.

[0026] Table 1 Chemical composition of high alumina fly ash and quicklime

[0027]

[0028] The mullite and xonotlite type composite thermal insulation and fireproof material in this embodiment is made by mixing 65kg of the above-mentioned high-alumina fly ash and 35kg of the above-mentioned quicklime, and then using a ball mill to grind it until all particle sizes are less than 0.12mm, and then adding 0.5 kg of barium chloride and 0.6 kg of aluminum chloride, then add 2022 kg of water according to the liquid-solid ratio of 20 and mix them evenly, then put them into a high-pressure reactor, control the reaction temperature to 230 ° C, and the reaction pressure to 2.83 MPa, 90-100 Insulate at ℃ for 60 minutes, at 150°C for 30 minutes, at 180°C fo...

Embodiment 2

[0033] The high-aluminum fly ash used in this example was taken from a power plant in Shuozhou City, Shanxi Province, and the quicklime was taken from a Lime Factory in Shuozhou City, Shanxi Province. The chemical composition is shown in Table 2.

[0034] Table 2 Chemical composition of high alumina fly ash and quicklime

[0035]

[0036] The mullite and xonotlite type composite thermal insulation and fireproofing material in this embodiment is made by mixing 62kg of the above-mentioned high-alumina fly ash and 38kg of the above-mentioned quicklime, and then using a ball mill to grind it until all particle sizes are less than 0.08mm, and then add 0.7 kg of aluminum chloride, 0.8 kg of aluminum sulfate and 1.2 kg of barium chloride, then according to the liquid-solid ratio of 15, add 1540.5 kg of water and mix evenly, then put them into a high-pressure reactor, control the reaction temperature to 250 ° C, and the reaction pressure to be 4.11MPa, heat at 90-100°C for 60min, h...

Embodiment 3

[0041] The high-alumina fly ash used in this example was taken from a power plant in Shuozhou City, Shanxi Province, and the chemically pure quicklime was taken from Tianjin Huadong Reagent Factory. The chemical composition is shown in Table 3.

[0042] Table 3 Chemical composition of high aluminum fly ash and quicklime

[0043]

[0044] The mullite and xonotlite type composite thermal insulation and fireproofing material in this embodiment is made by mixing 68kg of the above-mentioned high-alumina fly ash and 32kg of the above-mentioned quicklime, and then using a ball mill to grind it until all particle sizes are less than 0.08mm, and then add 0.4 kg of aluminum nitrate, 0.6 kg of barium sulfate and 1.0 kg of sodium sulfate, and then according to the liquid-solid ratio of 12, add 1224 kg of water and mix evenly, then put them into a high-pressure reactor, control the reaction temperature to 215 ° C, and the reaction pressure to 2.13 MPa, 90-100°C for 60min, 150°C for 30mi...

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Abstract

The invention relates to a method for using high-aluminium coal ash to synthesize a composite xonotlite insulation material and belongs to the field of inorganic insulation materials. The method comprises the following steps of: adopting the high-aluminium coal ash as a main material, uniformly mixing with water for pulping after mixing with calcium oxide or calcium hydroxide and grinding, carrying out dynamic hydrothermal-synthesis reaction after adding a trace additive, carrying out filtering and drying treatment in sequence after reaction and obtaining a composite insulation fireproof material of mullite and the xonotlite. The method has the beneficial effects that the main material high-aluminium coal ash is solid waste obtained by burning of high-aluminium coal in a coal-powder furnace of a power plant, so that the production cost of the composite material is greatly reduced; the material source is wide; simultaneously, the method for preparing the composite insulation fireproof material of the mullite and the xonotlite is simple, is short in reaction time, can consume the solid waste generated in a thermal power plant by large scale and is suitable for industrial promotion.

Description

technical field [0001] The invention relates to a method for synthesizing xonotlite composite thermal insulation material with high-alumina fly ash, in particular to a method for hydrothermally synthesizing mullite and xonotlite-type composite thermal insulation and fireproof boards with high-alumina fly ash. It belongs to the field of inorganic thermal insulation materials. It is mainly used in the fields of fire door core panels, ship bulkheads, steel structure insulation and fire protection, building exterior wall fire insulation, building flue ducts, and electrolytic cell insulation panels. Background technique [0002] my country's thermal power plants emit more than 400 million tons of fly ash every year. The transportation and large-scale storage of high-aluminum fly ash have caused serious problems of land occupation and environmental pollution. Dust pollution is prone to occur, causing excessive heavy metals in groundwater and other problems. High-aluminum fly ash ...

Claims

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Application Information

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IPC IPC(8): C01B33/26C01B33/24
CPCC01B33/24C01B33/26C01P2002/72C01P2006/32C01P2004/82C01P2006/10Y02W30/91
Inventor 赵春光王志谦
Owner 内蒙古中建亚太建材科技有限公司
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