A kind of beneficiation method of accumulation type bauxite

Abstract

The invention discloses an ore dressing method for accumulation-type bauxite, and belongs to the field of ore dressing of bauxite. The method comprises: drying raw bauxite at one time to obtain ore with the moisture content reduced to be less than 1%; sieving the obtained ore according to the size and performing corresponding coarse and fine processing; in the coarse processing, crushing ore with the size more than 50 mm to obtain ore with the size less than 50 mm, and sending the crushed ore for fine processing; in the fine processing, allowing the crushed ore to be subjected to primary ore-slime separation through a double-layer separation sieve, performing secondary drying to the obtained ore to obtain ore with the moisture content no more than 1%, performing rotary stirring, performing secondary ore-slime separation through the double-layer separation sieve, performing dust removal through allowing the obtained ore to pass through high-pressure air, and performing secondary crushing; in the secondary crushing, crushing the obtained ore to a specified dimension to obtain finished bauxite; and performing separation sieving to slime to get soil mine tailing less than 1mm for reclamation and backfill. According to the method, problems in a washing physical ore dressing method are solved, and the production cost of bauxite is reduced without environment pollution.

Description

technical field [0001] The invention relates to the field of beneficiation of bauxite, in particular to a beneficiation method of accumulation type bauxite, which realizes the recovery of accumulation type bauxite. Background technique [0002] Accumulative bauxite in Guangxi is a unique resource of bauxite in China. The raw ore contains nearly 60% water and mud. To recycle bauxite concentrate, impurities such as water and mud must be removed. At present, the beneficiation of accumulative bauxite The physical beneficiation method of water washing is adopted. This method has mature technology and has been used in accumulation-type bauxite beneficiation for more than 30 years. It is the current mainstream beneficiation method of accumulation-type bauxite beneficiation. method. [0003] The water washing physical beneficiation process requires large investment, long construction period, mature production technology but high production cost, and the qualified bauxite produced h...

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Problems solved by technology

[0003] The water washing physical beneficiation process requires a large investment, a long construction period, mature production technology but high production costs, and the qualified bauxite produced has high mud and water content. The process requires mud and water content below 10%. In actual production, mud and water content The amount of water is often higher than 10%, which virtually increases the cost of alumina smelting, which is also one of the main reasons for the high cost of alumina production; the construction of tailings ponds causes water and soil erosion, and mud leakage often occurs in tailings ponds, which brings great harm to production enterprises. There is a lot of pressure on safety and environmental protection

At the same time, with the advancement of mining, the amount of clay bauxite in the stope is increasing day by day. In some stopes, the amount of clay bauxite accounts for one-third of the ore in the stope, and some stopes even reach two-thirds. Mineral quantity, production practice has proved that the water washing method is not ideal for the treatment of cement bauxite, often resulting in qualified bauxite containing mud and water exceeding the standard, and some production enterprises directly do not mine cement bauxite, resulting in waste of resources and shortening the service life of enterprises

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