High-strength ceramsite containing contaminated soil, and preparation method of high-strength ceramsite

Abstract

The invention discloses high-strength ceramsite containing contaminated soil, and a preparation method of the high-strength ceramsite. The high-strength ceramsite is prepared from the following main raw materials: coal ash, the contaminated soil and bentonite; the preparation method comprises the steps of mixing the raw materials according to a proportion, granulating, drying, roasting, and cooling to obtain the high-strength ceramsite containing the contaminated soil. The high-strength ceramsite is produced by utilizing the coal ash, which is a by-product of local thermal power plants, and the industrial contaminated soil, so that the problem of local solid waste treatment is solved; the obtained high-strength ceramsite containing the contaminated soil is high in physical strength, good in chemical stability, low in stacking density and large in specific surface area and can be used for the fields such as building, water treatment and landscape art, and the production cost of the ceramsite is reduced; therefore, the high-strength ceramsite containing the contaminated soil has a good market prospect.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a high-strength ceramsite containing polluted soil and a preparation method thereof. Background technique [0002] Fly ash is the most important by-product of thermal power plants. my country is a country dominated by thermal power generation. A large amount of fly ash will be discharged from the flue of thermal power generation, and the reserve of fly ash is quite considerable. And with the continuous development of my country's electric power industry, the discharge of fly ash is increasing year by year. At present, the disposal of fly ash is still dominated by ash yard storage, and the contradiction between storage and land occupation is becoming more and more prominent. Fly ash has great harm to natural resources such as soil, water resources, and air resources, and will indirectly cause harm to the human body. The use of fly ash in industrial wast...

AI Technical Summary

Problems solved by technology

At present, there are mainly clay ceramsite and shale ceramsite with clay and shale as raw materials on the market. With the limited utilization of clay, shale and other resources, coupled with the high energy consumption of ceramsite production, the cost of ceramsite remains high.