Soil stabilizer prepared from bauxite dressing tailings

Abstract

The invention discloses a soil stabilizer prepared from bauxite dressing tailings, which comprises a powder component and a liquid component, the powder component is prepared from 20-60% of bauxite dressing tailings, 20-70% of a calcium activator and 0-40% of an auxiliary enhancer, the percentage is the effective dry mass percentage of the raw materials, and the sum of the percentage is 100%; and the liquid component is prepared from polyvinyl alcohol-polyethylene glycol and water according to a ratio of 1: 100. According to the invention, industrial solid wastes such as bauxite tailings and the like are greatly utilized, the utilization rate of the industrial solid wastes is increased, the industrial policies of energy conservation, emission reduction and green development in China are met, and the method has wide and profound significance on resource utilization of the industrial solid wastes. The prepared bauxite dressing tailing-based soil stabilizer can replace cement and lime to be applied to improvement and treatment of a road roadbed, has the advantages of no calcination, energy conservation, environmental protection and the like, has an obvious price advantage compared with cement and lime, and plays a positive role in promoting resource utilization of bauxite dressing tailings and other industrial solid wastes.

Description

technical field [0001] The invention relates to a comprehensive utilization technology of industrial solid waste, in particular to a soil solidifying agent prepared by using bauxite dressing tailings. Background technique [0002] Bauxite beneficiation can solve the separation of diaspore and kaolin while removing impurities. This process will produce tailings equivalent to about 20% to 30% of the original ore quality, that is, bauxite beneficiation tailings. Except for a small part of unseparated diaspore, it is mainly kaolin minerals, and its chemical composition contains alumina (35-50%) and silicon dioxide (31-46%). The generation and accumulation of these tailings will waste a lot of resources, increase the burden on enterprises, and cause harm to the environment and society. [0003] my country's aluminum industry is developed. In 2019, it produced about 72.83 million tons of alumina and about 18.21 million tons of tailings, which can be seen in the huge accumulation ...

AI Technical Summary

Problems solved by technology

There are many problems in the stockpiling of bauxite tailings: (1) The accumulation of bauxite tailings is difficult, because the tailings have small particle size, slow settlement, low viscosity, and will form mud in heavy rainy days, flowing to low potential energy areas, It cannot be piled up, and it is easy to generate sand when encountering strong winds, polluting the surrounding air environment, and bringing burdens and problems to enterprises; The chemical residues from mineral processing will penetrate into the surrounding area, causing environmental pollution, which is not conducive to sustainable development

Since the production of cement and lime requires the mining of a large amount of clay and limestone, this will consume a large amount of energy, cause soil erosion and ecological imbalance, and aggravate the deterioration of the natural environment, which is seriously contrary to the concept of ecological environment protection advocated by the state.

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