Mineral separation method for recovering fluorite from flotation tailings of wolframite and scheelite

Abstract

The invention relates to a mineral separation method for recovering fluorite from the flotation tailings of wolframite and scheelite. The method comprises the following steps: a modified oleic collector is added into the flotation tailings of wolframite and scheelite, roughing is carried out and then the rough concentrates and tailings of fluorite are obtained, wherein the modified oleic collectoris the combination of oleic acid, kerosene and octylphenyl polyoxyethylene ether; a gangue inhibitor is added into the rough concentrates of fluorite and fine separation working is carried out, wherein the gangue inhibitor is the combination of aluminum sulfate, tannin extract and sodium hexametaphosphate. According to the mineral separation method disclosed by the invention, through improvementfor a flotation reagent, the disadvantages of high pressure, corrosion resistance and the like of a tailing pond, caused due to the difficult sedimentation of tailings, which are brought by the adoption of sodium silicate, acidified sodium silicate and other inhibitors in fluorite flotation in the prior art, are overcome, and safe, environment-friendly and efficient development and utilization forfluorite resources in the flotation tailings of wolframite and scheelite are realized; and meanwhile, the grade and recovery rate of fluorite concentrates are increased, the content of CaF2 in the fluorite concentrates is higher than 95%, the recovery rate is higher than 75%, and good economic benefits and application prospect are achieved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a beneficiation method for recovering fluorite from flotation tailings of black and white tungsten ore. Background technique [0002] Fluorspar, also known as fluorspar, fluorspar powder, or fluorspar powder, is an equiaxed mineral whose main component is calcium fluoride (CaF 2 ), is the main fluorine raw material. With the rapid development of my country's economy, the demand for fluorine is increasing day by day, and the high-grade single-type fluorite ore resources are gradually exhausted. Therefore, how to maximize the use of associated (symbiotic) fluorite ore, especially poly The fluorite resource in the metal tailings has become an urgent problem to be solved in the development of the fluorine industry today, and the flotation process is the most important beneficiation method for fluorite ore. [0003] There are many existing methods for utilizing flotation t...

AI Technical Summary

Problems solved by technology

[0004] At present, in the fluorite beneficiation industry, soda ash is usually used to adjust the pH value of the pulp, and water glass is used as an inhibitor and oleic acid or sodium oleate is used as a collector. Production safety management and worker operation have caused major safety hazards; in order to improve the grade of fluorite concentrate, the amount of water glass added is also large, which makes the fine tailings suspended and the tailings are difficult to settle. The storage capacity requirements are very high, resulting in great environmental pressure; at the same time, the collector oleic acid has disadvantages such as poor water solubility, poor dispersibility, easy stratification, and unstable performance.

Inhibitors such as water glass and acidified water glass are generally added to the fluorite beneficiation operation, which also causes disadvantages such as difficulty in sedimentation of tailings and acid corrosion.

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