Reinforced floatation desilicification method for high-silicon bauxite

Abstract

The invention provides a reinforced floatation desilicification method for high-silicon bauxite, which comprises the following steps: grinding the bauxite; at room temperature, applying a collecting agent and an inhibitor; spraying water; and then performing primary rough flotation, primary fine floatation, secondary fine floatation and middle-product scavenging, wherein the products floated from a raw ore are used as tailings and the products in a groove are used as concentrate bauxite. By using the method, the floating ratios of target ores and non-target ores are increased, the non-target ores are more easily floated, the flotation index is increased, the operation is simple, the energy consumption is low and the handling capacity is large.

Description

Technical field [0001] The invention relates to an enhanced flotation desiliconization method, in particular to an enhanced flotation desiliconization method for selecting silica-containing gangue minerals from bauxite and enriching alumina trioxide. technical background [0002] Bauxite is the most important ore resource in the alumina industry. At present, 95% of bauxite is used to produce alumina, and bauxite is used as a raw material for aluminum smelting. The smelting method varies depending on the ratio of aluminum to silicon. The Bayer process requires The aluminum-silicon ratio A / S of bauxite is 8-10, the combined method is 5.0-7.0, and the sintering method is 3.5-5.0. The ore types of bauxite in the world can be roughly divided into three basic types: gibbsite type, boehmite type, and diaspore type according to the useful mineral composition. At present, the production of alumina abroad mainly uses gibbsite, and the typical production process is the Bayer process. my c...

AI Technical Summary

Problems solved by technology

Although biological beneficiation technology has a good development prospect, the current experimental research has not yet achieved satisfactory technical and economic indicators, and the cost is high and the cycle is long; The removal of silicon is beneficial, but its energy consumption is high, the roasting system is strict, and the technology is not perfect; physical beneficiation, especially flotation, has the advantages of large processing capacity, low cost, easy to increase the ratio of aluminum to silicon, low energy consumption, high efficiency, and easy industrialization It is the first choice technology for flotation desiliconization. Its main disadvantage is that the ore is easy to muddy, resulting in harsh flotation environment and low flotation index. This is the first problem that must be solved in bauxite flotation.

In recent years, although some people have begun to use various physical and chemical methods to improve the flotation environment, the results are not ideal.

Enrich the target mineral Al from low-grade bauxite by adopting the reverse flotation desilication method of "enhanced secondary enrichment technology" without desliming in advance 2 o 3 Not yet reported