Method for separating and extracting fine particle Ta-Nb concentrate

Abstract

The invention provides a method for separating and extracting fine particle Ta-Nb concentrate. Ta-Nb slurry is used as a raw material. The method comprises the steps of (1) pretreatment; (2) dispersion flocculation; (3) centrifugal grading selection; the pretreatment (1) comprises the steps of treating the Ta-Nb slurry till that the mass percentage is not lower than 20% as selection ore pulp 1; the dispersion flocculation (2) comprises the steps of adding a dispersant hexametaphosphate into the selection ore pulp 1, stirring for plural minutes, then adding a flocculant and stirring for plural minutes to obtain selection ore pulp 2; the centrifugal grading (3) comprises the steps of placing the selection ore pulp into a centrifugal separator for centrifugal grading so as to obtain the fine particle Ta-Nb concentrate. According to the method, the grade of the recycled fine particle Ta-Nb concrete is high, the recycle rate of the Ta-Nb concrete is high, the economic technical benefits are obvious, the treatment to three wastes is small, and the influence on the environment is small.

Description

Technical field: [0001] The invention relates to a method for separating and extracting tantalum-niobium concentrate, in particular to a method for separating and extracting fine-grained tantalum-niobium concentrate. Background technique : [0002] Tantalum and niobium are two important rare metal element materials, which have important strategic and economic value. With the development of economy, the consumption of various electronic products continues to grow, which makes the industrial demand for tantalum and niobium increase sharply, which intensifies the demand for tantalum and niobium. , The tightness of the supply of niobium mineral resources. my country has rich reserves of tantalum and niobium raw materials, of which tantalum accounts for 20% of the world's reserves, and niobium accounts for about 15% of the world's reserves. Fine, the recovery rate of beneficiation is low, especially the low recovery rate of tantalum and niobium in fine-grained ore slime is the ...

AI Technical Summary

Problems solved by technology

These roughing enrichment technologies have the disadvantages of low recovery rate and low enrichment ratio when recovering tantalum and niobium in fine-grained ore slime, resulting in waste of tantalum and niobium resources

[0004] The key problems in the prior art: First, in the gravity separation process of general fine-grained tantalum-niobium ore slime, the fine ore mainly composed of gangue minerals A large amount of mud covers the surface of tantalum-niobium minerals or is closely combined with tantalum-niobium minerals, which is difficult to separate from useful minerals. This is also the main reason for the low grade of tantalum-niobium concentrates in the separation of fine-grained tantalum-niobium ore slimes

[0005] For example, the Chinese patent application No. 201210374718 "a method for beneficiation of fine-grained tantalum-niobium ore" is an improvement on the basis of the existing beneficiation method , which pretreats the slime, and then adds various regulators such as sodium carbonate, inhibitor water glass, activator lead nitrate, benzohydroxamic acid, hydroxyamino acid and other chemical reagents to the pretreated slime, This method of adding a variety of chemical reagents in the process of beneficiation has the following problems: first, too many chemical reagents are added; , the impact on the environment is high, and the production cost is high