Red mud desanding method and system in alumina production

Abstract

The invention discloses a red mud desanding method and a red mud desanding system in alumina production, and in particular relates to the red mud desanding method and the red mud desanding system in the technology for producing the alumina by filtering red mud through a revolving drum red mud filter. The red mud desanding system in the technology for producing the alumina consists of a hydraulic cyclone, a vibration sieve, a sand washing tank, a sand pump, a collecting tank, a submerged pump and corresponding pipeline valves. The red mud desanding system has good desanding effect, stable operation and wide application range, and can be applied to building new factories and effectively applied to reforming old factories.

Description

technical field [0001] The invention relates to a red mud desanding method and system in alumina production, in particular to a red mud desanding method and system in the alumina production technology using a rotary drum type red mud filter to filter the red mud. Background technique [0002] In the dissolution system of alumina production, after the alumina in the bauxite is taken away by the alkali solution, the bauxite particles undergo a "dissociation" effect, and the large particles of bauxite are decomposed into small particles. However, some minerals such as quartz do not react with the lye, and their particle size does not change. After entering the drum red mud filter, these minerals are deposited at the bottom of the half-moon pool and cannot be discharged. The production plants that adopt the red mud filtration process in alumina production all set up desanding units in the red mud settlement section to avoid the impact of large particle minerals on the production...

AI Technical Summary

Problems solved by technology

[0003] ①Due to the limitation of the sieve hole, only sand particles larger than 2mm can remain on the sieve

[0004] ② The sand screened out by the rotary sieve is partially sticky with red mud, and the working environment for its collection and transportation is poor

[0005] ③ Since this technology can only be applied between the last washing and settling tank and the penultimate washing and settling tank, this technology is limited by the actual equipment configuration in different fields

This technology cannot be applied if there is no space for equipment installation between the last scrubber settling tank and the penultimate scrubber settling tank

[0006] ④The sand particles of this sand removal technology can only be cleaned and transported manually, which is labor-intensive

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