Method of using red mud to prepare firing-free lightweight aggregate

Abstract

The invention discloses a method of using red mud to prepare firing-free lightweight aggregate and relates to the technical field of solid waste recycling. The method includes steps: adding water to well stir the red mud, cement and fine sand according to a proportion of 5:2:3 and a water-solid ratio of 0.22:1; using a ball pressing machine to make balls of 5-10mm, and curing indoors for three days to go out a factory. The method is simple and easy to implement, low in cost, energy-saving, environment-friendly and easy to popularize and use, and recycling degree of industrial waste is increased.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a method for preparing burn-free lightweight aggregate using red mud. Background technique [0002] Red mud is industrial waste discharged from alumina plants. A large amount of these solid wastes occupy a large amount of land, pollute groundwater sources and the atmospheric environment, and pose a serious threat to the property and life safety of surrounding people. According to the analysis, the CaO content of red mud (sintering method) is as high as 40%, and it contains a large amount of cement active ingredients - calcium silicate and other hydraulic materials, which can replace lime and cement for building materials. The large-scale comprehensive utilization of red mud resources is in line with the national industrial policy. It can not only save a lot of precious land resources and protect the ecological environment, but also generate huge econom...

AI Technical Summary

Problems solved by technology

[0002] Red mud is industrial waste discharged from alumina plants. A large amount of these solid wastes occupy a large amount of land, pollute groundwater sources and the atmospheric environment, and pose a serious threat to the property and life safety of surrounding people.