Red mud porous material

Abstract

The invention discloses a red mud porous material. In order to solve the problem of discharge of red mud, the invention adopts a synthetic technology of chemically bonded ceramics and a chemically entraining technology; and according to the invention, the porous material is prepared from red mud serving as a part of raw material of a synthetic material, as well as solid water glass, slags, coal ash, a foam stabilizer, water and a foamer. The porous material has the advantages of uniform aperture, light weight, good insulating property, low water absorption, high strength, high percentage of close area, environment-friendliness, high solid waste utilization rate and the like, and the percentage of close area of the prepared red mud porous material is over 95%, the dry density is 450-700kg / <m3>, the heat conducting coefficient can be lower than 0.13w / mk and the fire protection ability can reach 4 hours, so that the material can be widely applied to aspects such as chemical engineering, heating and heat insulating, building energy conservation, indoor sound isolation and noise barriers for expressways.

Description

technical field [0001] The invention relates to a red mud porous material, which belongs to the technical field of building material preparation. Background technique [0002] Red mud is an industrial solid waste discharged from the extraction of alumina from bauxite during the aluminum smelting process. Due to different production processes, red mud is divided into Bayer red mud, sintering red mud and combined red mud. Every ton of aluminum smelted produces 1.0-2.0 tons of red mud. my country discharges tens of millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized and can only be stacked in large-area storage yards. Large-scale stacking not only occupies A large amount of land has also caused serious pollution to the environment. At present, tens of millions of tons of red mud have been piled up in the yard and have not been effectively developed and utilized. Therefore, it is an urgent problem to make full use of red mu...

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Problems solved by technology

After searching, there is no report of using red mud to prepare porous materials