Bauxite Milling method

Abstract

The present invention relates to a grinding method of bauxite, belonging to a bauxite separation method. It is characterized by that the material-ball ratio in bauxite grinding machine is 1:0.8-1.2, in which the ball diameter of grinding ball includes large ball 110mm, medium ball 90mm and small ball 70mm, and matched ratio of number of large, medium and small balls is 1:1.5-2:0.9-1.4, the bauxite grinding concentration is 50%-20% and the grinding time is 10-30 min. Besides, said invention also provides its application range and field.

Description

technical field [0001] A bauxite grinding method relates to a bauxite beneficiation method. Background technique [0002] my country's bauxite resources are relatively rich, ranking fourth in the world, but compared with foreign bauxite, my country's bauxite obviously has the characteristics of high aluminum, high silicon and low iron. That is, although the content of alumina in my country's bauxite is relatively high, but because the ore contains high silica at the same time, the aluminum-silicon ratio of the ore is generally low, and half of the reserves of bauxite have an aluminum-silicon ratio of 4. ~ 6, which resulted in the production of alumina in my country can only adopt the hybrid process, resulting in high production costs of alumina in my country. In the implementation process of beneficiation-Bayer method, how and what kind of grinding fineness is the key to the success of bauxite beneficiation. If the particle size is too coarse, the diaspore monomer cannot be ...

AI Technical Summary

Problems solved by technology

That is, although the content of alumina in my country's bauxite is relatively high, but because the ore contains high silica at the same time, the aluminum-silicon ratio of the ore is generally low, and half of the reserves of bauxite have an aluminum-silicon ratio of 4. ~6, which resulted in the production of alumina in my country can only adopt the hybrid process, resulting in high production costs of alumina in my country

In the implementation process of beneficiation-Bayer method, how and what kind of grinding fineness is the key to the success of bauxite beneficiation. If the particle size is too coarse, the diaspore monomer cannot be dissociated, and the aluminum-silicon The early separation production of relatively high coarse concentrate and too fine particle size control will cause serious muddying of bauxite minerals, which will not only cause the deterioration of ore dressing indicators, but also increase the cost of ore dressing Dehydration of concentrates has serious negative impacts

[0003] The existing bauxite grinding generally uses balls with a large diameter of 110mm, and the ball material control is relatively high, above 1.5. Due to the large difference in the grindability of ores, it will cause over-grinding of easy-to-grind ores, and mud Serious

Causes early separation of coarse-grained grades with high aluminum-silicon ratio and difficulty in agglomeration flotation of fine-grained grades