Method for manufacturing building sheet material by utilizing solid wastes

Abstract

The invention provides a method for manufacturing a building sheet material by utilizing solid wastes and relates to the field of building materials. The method comprises the following steps: modifying red mud, extracting plant cellulose from crop straws, manufacturing a sheet material blank, molding, dehydrating, drying and maintaining to obtain the building sheet material. The building sheet material has high thermal stability, corrosion resistance, bending strength and static bending strength, relatively low density and high heat-insulation and heat-preservation effects, and is one buildingsheet material with excellent performance; the method takes phosphogypsum and the red mud as raw materials, so that the consumption capability of the two solid wastes is increased, and the environment is protected; the utilization of traditional resources including wood, sandstones and cement is also reduced, and the resources are saved.

Description

technical field

[0001] The invention relates to the field of building materials, in particular to a method for making building boards from solid waste. Background technique

[0002] Red mud is the solid waste discharged during the alumina production process, and about 1.0-2.0 tons of red mud is discharged for every ton of alumina produced. At present, the comprehensive utilization rate of red mud in my country is only 4%, and the accumulated stockpile has reached hundreds of millions of tons. Most alumina factories in my country use open-air dams to stockpile red mud. This disposal method not only occupies a large area of ​​land, but also the alkali in the red mud will seep into the ground, causing groundwater and soil pollution. At the same time, the fine dust formed by exposed red mud drifts with the wind, which will also pollute the atmosphere, deteriorate the ecological environment, and seriously affect the survival of humans, animals and plants. Therefore, how to deal...

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