Red mud treatment system and method

Abstract

The invention relates to the technical field of red mud treatment, and discloses a red mud treatment method, which includes the following steps: S1 red mud magnetic screening and filtration treatment: putting red mud raw materials into a red mud treatment system for magnetic screening and filtration, and obtaining magnetic coarse material and coarsely filtered red mud; S2 coarsely filtered red mud treatment: preparing the coarsely filtered red mud into a red mud hydrochloric acid leaching solution, desiliconizing the red mud hydrochloric acid leaching solution to obtain a desiliconized red mud hydrochloric acid leaching solution, and then neutralizing and precipitating the desiliconized red mud hydrochloric acid leaching solution to form a rare earth element-containing powder. The present invention reduces the red mud content, which is convenient for subsequent reprocessing of the red mud; the rare earth elements after refining do not contain impure iron elements, improve the purity of the rare earth elements, facilitate the treatment of the red mud, improve the economic benefit, facilitate the extraction and recovery of iron elements and rare earth elements in the red mud, facilitate the screening and separation of magnetic substances, improve the screening efficiency and purity, and thus improve the red mud treatment efficiency.

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