Full recycling method of red mud

Abstract

The invention relates to a full recycling method of red mud. The method is characterized in that red mud, which is an industrial solid waste with high reserve and difficulty in treatment and utilization, is subjected to multi-step and sequential processing treatment, so that the preparation of five high-value and strong environment-friendly products, namely rare earth mineral products containing rare earth metals of lanthanum, cerium and yttrium, TiCl4, ZrCl4, iron ore concentrate and road foundation stone raw materials, can be realized at the same time, wherein the available value of various products is high, the application range is wide, and the economic benefit is remarkable. According to the full recycling method, the maximum consumption of the conventional industrial waste pollutant red mud is realized, the technical problems of high yield, difficulty in treatment and serious environmental pollution are solved, and the excellent effects of rich product types, wide industrial application range, high additional value and full recycling of raw materials are also realized, so that the method is high in resource utilization rate, remarkable in economic benefit and social benefit and wide in market application prospect.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource treatment, in particular to a method for fully recycling red mud. Background technique [0002] In the production process of alumina, about 1 to 1.5 tons of red mud is produced for every ton of alumina produced. Therefore, the comprehensive utilization of red mud discharged in the alumina production process is a worldwide problem. As a major producer of alumina, my country's annual red mud discharge is close to 150 million tons, and the cumulative discharge has exceeded 1.3 billion tons. Red mud has become the largest pollutant in alumina plants. At present, the global red mud reserves are estimated to have exceeded 3 billion tons, the average utilization rate of red mud in the world is 15%, and the utilization rate of red mud in China is only 4%. The environmental pollution caused by red mud stockpiling has become a bottleneck for the development of alumina, and the harmlessness and...

AI Technical Summary

Problems solved by technology

[0012] The technical purpose of the present invention is to provide a process for full recycling of alumina red mud with simple process flow, low cost of raw materials used in processing, various types of products, high added value, full utilization of resources, and full recovery of materials. , to solve the technical problems of large storage of alumina red mud, difficult treatment and serious environmental pollution

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