Raw material mixing ratio and preparation method of red mud ceramsite

Abstract

The invention discloses a raw material mixing ratio and preparation method of red mud ceramsite. The red mud ceramsite is prepared from the following raw materials by weight percent: 15 to 75 percentof red mud, 10 to 65 percent of building waste or sludge or bauxite or coal ash or coal gangue or clay or binder, 1 to 20 percent of water, 5 to 35 percent of crushed glass or SiO2, 5 to 25 percent ofcement and 10 to 45 percent of foaming agent or gas forming agent or expansion agent or other additives (comprising bentonite, NaNO3 powder, starch and metal powder such as aluminum, zinc, calcium carbide, magnesium and the like). The binder, the gas forming agent and the foaming agent comprise all types available in the market at present. The production process comprises the steps of treating raw materials, pelletizing, granulating, layering screening, baking by a temperature box, calcining raw ceramsite, and cooling. The ceramsite prepared in the invention meets the national and relevant industrial safety requirements and indexes and has excellent acoustic performance and is high in high temperature resistance, high pressure resistance and strength. In addition, a great amount of solidwaste is adopted, so that the environmental protection significance is outstanding. Production equipment utilizes bio-fuel, thereby saving the energy compared with a conventional calcining productionmethod.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and specifically relates to a compounding ratio for producing red mud ceramsite by comprehensively utilizing solid waste such as red mud generated in the process of smelting alumina and construction waste, sludge, broken glass, etc. and production. Background technique [0002] At present, my country has become the world's largest producer of alumina. At the same time, a large amount of red mud, a solid waste discharged during the alumina production process, has accumulated in large quantities, which not only makes the aluminum industry enterprises pay high costs for the management of red mud, but also is easy to deal with. The environment has caused serious radiation pollution and chemical pollution. In view of this, the patent of the present invention utilizes red mud, and simultaneously adds solid waste or solids such as construction waste, sludge, coal g...

AI Technical Summary

Problems solved by technology

[0002] At present, my country has become the world's largest producer of alumina. At the same time, a large amount of red mud, a solid waste discharged during the alumina production process, has accumulated in large quantities, which not only makes the aluminum industry enterprises pay high costs for the management of red mud, but also is easy to deal with. The environment has caused serious radiation pollution and chemical pollution