A kind of bauxite graded flotation desiliconization method

Abstract

The invention relates to a bauxite classification and floatation desilication method, in particular to a bauxite high-speed disc type classification-positive floatation desilication method. The bauxite high-speed disc type classification-positive floatation desilication method is characterized in that ore grinding products are subjected to two-stage classification, and obtained coarse grain ore pulp and fine grain ore pulp enter a floatation system to be floated. According to the bauxite high-speed disc type classification-positive floatation desilication method, the bauxite ore pulp is efficiently classified through a high-speed disc type classifier, and the classified ore pulp is floated. The problem that fine particles and coarse particles in bauxite difficult to float are mixed and are difficult to float is effectively solved, the treatment capacity of the floatation system is improved, the floatation index of the floatation system is increased, production cost is reduced, the resource recovery rate is high, and economic benefits are good.

Description

technical field [0001] A bauxite classification flotation desiliconization method, in particular to a bauxite high-speed disc classification-positive flotation desilication method. Background technique [0002] With the development of the alumina industry, the demand for bauxite resources is increasing rapidly year by year. The reserves of high-quality bauxite resources in my country are relatively low, and the available resources are characterized by "poor, fine, miscellaneous, and difficult". The main method of bauxite is getting more and more attention. [0003] At present, the desiliconization of bauxite basically adopts the process of positive flotation desiliconization, and it is a closed-circuit process, that is, the raw ore is ground and classified, and the coarse-grained grade is returned to the mill for re-grinding to obtain a better dissociation degree. Fine-grained mineral slurry; by adding flotation agents, the high-alumina minerals are floated in the form of fo...

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Problems solved by technology

[0004] Due to the difference in the particle size of mineral embedding, in the grinding process, there will be two grades of differentiation of coarse and fine particles, and there will be fewer intermediate particle sizes. The main components are gangue minerals such as illite and pyrophyllite. These minerals will absorb a large amount of flotation agents in the flotation system, which will affect the interaction between coarse-grained minerals and flotation agents, seriously interfere with the flotation process, and reduce the loss of flotation agents. The effect will lead to low metal recovery rate and increased dosage of chemicals, which will directly lead to increased production costs and affect the competitiveness of enterprises.

[0005] The technical key of the bauxite beneficiation process is in the processing method of the coarse and fine particle size of the bauxite grinding products. The coarse particles are directly used as the concentrate, so the concentrate grade fluctuates greatly and the yield is high; the coarse and fine materials are mixed and floated. The fine-grained material has low grade, poor selectivity, and strong adsorption to chemicals, which affects the effect of coarse-grained flotation.

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