Flotation two-stage desiliconization method for high-silicon bauxite

Abstract

The invention relates to a flotation two-stage desiliconization method for high-silicon bauxite, which is a flotation desiliconization technology for bauxite and belongs to the technical field of mineral processing engineering. The method comprises the following steps of: coarsely grinding the bauxite into particles with certain fine granularity; under the condition of a certain ore pulp concentration, performing flotation first-stage desiliconization by using sodium carbonate as a pH regulator and a dispersing agent of the ore pulp, water glass and sodium hexametaphosphate as a combined inhibitor of gangue mineral, lead acetate as an activating agent of the bauxite, sodium oleate as a collector of the bauxite and pine oil as a foaming agent, wherein the base flow in a flotation groove is a section of silicon-containing tailings; allowing foam products to enter a grinding machine and grinding the foam products into particles with fine granularity; adding the medicaments sequentially and mixing pulp; performing flotation second-stage desiliconization, wherein the base flow in the flotation groove is a section of silicon-containing tailings; and selecting the foaming products for multiple times to form bauxite concentrate. The sectional desiliconization method for 'flotation first-stage desiliconization after coarse grinding and flotation second-stage desiliconization after regrinding rough concentrate' is utilized, so the influence of ore argillization phenomenon on desiliconization is greatly reduced, the flotation desiliconization effect on the high-silicon bauxite is obvious, the silicon dioxide content of the bauxite concentrate can be reduced greatly, the ratio of aluminum to silicon of the bauxite concentrate is increased, and the recovery rate is high.

Description

technical field [0001] The invention relates to a two-stage desiliconization method of high-silicon bauxite flotation, belonging to the field of mineral processing engineering. Background technique [0002] A high aluminum-silicon ratio is the most important requirement for the quality of bauxite in the alumina industry and the refractory industry. With the rapid development of alumina and refractory materials industry, high-quality bauxite resources with low silicon content are decreasing day by day, and the beneficiation of poor-quality high-silicon bauxite has attracted widespread attention at home and abroad. More than 80% of my country's bauxite resources are bauxite with high silicon content. Therefore, desiliconization and obtaining high-aluminum-silicon ratio concentrates are the main purposes of my country's bauxite beneficiation. [0003] The flotation desiliconization method is currently researched and applied more, and it is also a more effective method. my cou...

AI Technical Summary

Problems solved by technology

my country's bauxite has high aluminum, high silicon, and most of the aluminum-containing minerals are diaspore, which is hard, hard to grind, fine-grained, and has many types of silicon-containing minerals (kaolinite, illite, pyrophyllite etc.) and low hardness, low density, easy to grind, etc., the ore dressing and desiliconization process used for it mainly includes one-stage grinding and one-time flotation and stage grinding and one-time flotation, etc. During the ore grinding process, these processes often lead to Silicon-containing minerals are over-crushed and muddied, resulting in the entrainment and floating of silicon-containing fine-grained gangue during the flotation process, and the desiliconization effect is poor, which affects the recovery rate of concentrate

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