Technique for industrialized development and utilization of red mud

Abstract

A technical method of industrialized exploitation / utilization of red mud is provided, aiming to solve the issue of the treatment and industrialized exploitation on red mud, which is a byproduct produced by the production process of alumina. The method includes the procedures as follows: fine iron ore with the grade of complete iron of 43-53 percent is selected from the red mud, dehydrated, and dried, then added with a certain amount into the opened melted iron, and the ferric oxide inside the fine iron ore is melted and reduce to iron water through the utilization of the over saturated carbon and the high temperature of the melted iron, as well as the mixing function of the flowing melted iron, then the melted iron enters into the steel-making system. The present invention has the advantages of low requirement of investment and high comprehensive benefit, and is in favor of the utilization of natural resource and the environmental protection.

Description

technical field [0001] The invention relates to the field of treatment and industrialized development and utilization of red mud, a by-product produced in the alumina production process. Background technique [0002] In the process of alumina production, a by-product—red mud will be produced. Red mud is used as industrial waste for alumina production. For every ton of alumina produced, 1-1.8 tons of red mud must be discharged. The current common practice is to build dams That is to say, it will be piled up into a heap of red mud, and only a small amount of red mud is used in the production of cement and building materials in China. Red mud is an alkaline substance, and the sewage generated by red mud mud and rainwater washing will pollute water quality and soil. In addition, red mud contains a variety of valuable components, which are piled up and discharged in large quantities, which not only affects the environment, but also wastes resources. [0003] In alumina deposits...

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Problems solved by technology

[0004] The treatment and comprehensive utilization of red mud is one of the problems that plague the production of alumina all over the world. The recovery of iron in red mud is an important part of the comprehensive utilization of red mud. Over the years, relevant universities and research institutions at home and abroad have carried out research on red mud In order to study and discuss, various technological methods were used in the laboratory to carry out experiments to prove that iron ore concentrate can be selected, but most of them have not done industrial experiments, or because of economic aspects and the selection of iron ore powder contains alkali metals and other reasons. Industrial application cannot be realized. According to the investigation, there is currently no large-scale production line in China that uses red mud to extract iron ore and digest it in large quantities.

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