Method for disposing red mud into building material through permanent magnet material and salty mud

Abstract

Disclosed is a method for disposing red mud into a building material through a permanent magnet material and salty mud. The method comprises the following steps: a, the red mud is pulped through deionized water, slurry is subject to magnetic separation through the permanent magnet material, and radioactive mineral aggregates in the slurry are selected out, and comprise ilmenite, iron mine and monazite; b, remaining slurry is subject to water removal, and heavy metal in the slurry is removed. Minerals of the red mud are subject to phase analysis, according to the natural difference of the different minerals, the red mud slurry is subject to permanent magnet operation, and the radioactive mineral aggregates, including iron ores, the ilmenite, the monazite and other substances, of the slurry are separated out. After radioactivity in the red mud is removed, the magnetically-separated ilmenite, iron ores, monazite, heavy metal and other mineral aggregates can be recycled, environment pollutions and potential safety hazards brought by a red mud dam can be thoroughly removed while useful value of the red mud is used thoroughly, pressure brought by resources and the environment is relieved, and economic benefits, social benefits and environment benefits are unified.

Description

technical field [0001] The invention relates to a method for using permanent magnet materials and salt mud to treat red mud as building materials, and belongs to the field of environmental protection. Background technique [0002] Red mud is an industrial solid waste in the alumina production process. Generally, 1.0-1.8 tons of red mud is produced for every 1 ton of alumina produced. It has two characteristics of strong alkalinity and high radioactivity. According to the different processes of alumina production, red mud is divided into two different types: Bayer method and sintering method. For bauxite with high aluminum content, the Bayer method is used to smelt aluminum, and the red mud produced is called Bayer red mud; for bauxite with low aluminum content, the sintering method is used to smelt aluminum, and the red mud produced is called sintering. French red mud. At present, the disposal method of red mud is mainly stacked in the yard for a long time. The constructi...

AI Technical Summary

Problems solved by technology

However, the above methods mostly stay in the stage of laboratory research, and none of them have been used on a large scale.

At present, the utilization rate of red mud is less than 10%, and the cumulative domestic stockpiles exceed 50 million tons

[0003] At present, the largest field that can completely dispose of red mud is the construction material industry, but high radioactivity is a problem that restricts its application