Method for preparing highly-doped fly ash lightweight heat-insulation bricks, and bricks prepared by same

Abstract

The invention discloses a method for preparing highly-doped fly ash lightweight heat-insulation bricks. The preparation method comprises: preparing aluminum powder paste, sodium sulfate, sodium abietate, water, fly ash, carbide slag or lime powder and gypsum which are weighed in a ratio by weight into fly ash non-burnt ceramic particles; feeding fly ash, slag or coal gangue, carbide slag or lime powder, desulfurized gypsum or gypsum powder which are weighed in a ratio by weight into a wheel-grinding machine for wheel-grinding and obtaining a mixture; preparing rosin powder, sodium hydroxide, water together with gelatin and water together with triethanolamine which are weighed in a ratio by weight into admixture II; weighing the fly ash non-burnt ceramic particles, the mixture, cement and the admixture II in a ratio by weight and feeding the materials into a stirrer for stirring and adding water while stirring to adjust the water content of the materials to reach 17 to 21 percent; feeding the obtained product into a molding machine to prepare the obtained product into green brick bodies; and obtaining finished products through maintenance. The method has the advantages of low cost and no environmental pollution produced during production, and all standards of the lightweight heat-insulation bricks meet the requirements of national standards.

Description

technical field [0001] The invention relates to building bricks, in particular to a preparation method of high-volume fly ash light-weight thermal insulation bricks and the bricks produced. Background technique [0002] The current production of lightweight thermal insulation bricks needs to add a certain amount of light aggregates to make the products light and thermal. At the same time, a certain amount of aggregates, such as sand, stone, and perlite, must be added. Or sintered ceramsite, etc., to improve the compressive strength of lightweight insulation bricks. Such as CN1421415 discloses a kind of lightweight brick, and its raw material is composed of: 50~68 parts of cement, 20~40 parts of fly ash, 10~15 parts of perlite, 2~4 parts of water glass. CN1105346 discloses a thermal insulation brick and its production method. The raw material components of the thermal insulation brick are: 55-58% of fly ash, 25-35% of expanded perlite, 3-10% of waste polystyrene foam plastic...

AI Technical Summary

Problems solved by technology

The price of sintered ceramsite is relatively high, about 150-400 yuan / cubic meter, which will lead to a substantial increase in the cost of the end product, and the use of clay restricted by the state as raw material will cause environmental pollution during the sintering process.