A fine mineral separation method combining cavitation pretreatment and carrier flotation

Abstract

The invention relates to a fine mineral separation method combining cavitation pretreatment and carrier flotation, which is suitable for coal separation. The method includes preparing pulp by utilizing fine minerals, adding a collector, then adjusting the pulp, and circulating the adjusted pulp in a venturi cavitation tube to achieve cavitation; preparing carrier particle pulp, adding a collector,and circulating the adjusted carrier particle pulp in a venturi cavitation tube to achieve cavitation; stirring the adjusted fine mineral pulp after cavitation and the adjusted carrier particle pulpafter cavitation according to a ratio, conveying the mixture to a flotation machine, performing flotation to finally obtain a foam product and a tailing product, and recovering carrier particles. Thesteps are simple, the effect is good, the collision probability of fine particles and flotation bubbles is increased, and the selectivity of flotation is improved. The carrier particles are cleaned bycavitation pretreatment and recycled, thus reducing the loss of the carrier particles; cavitated nano-bubbles on the surfaces of the carrier particles can also promote the adhesion of the carrier particles and the flotation bubbles, thus improving the efficiency of carrier flotation.

Description

technical field [0001] The invention relates to a fine mineral separation method, which is especially suitable for the fine mineral separation method combined with cavitation pretreatment and carrier flotation used in the technical field of mineral engineering. Background technique [0002] With the continuous reduction of easy-to-select coarse-grained mineral resources, the efficient separation of low-grade and fine-grained minerals is becoming more and more important. The small amount of fine minerals and large specific surface area lead to a low probability of particle-bubble collision mineralization, serious entrainment of gangue particles in water flow, and poor selectivity of conventional flotation separation, making it difficult to obtain ideal indicators. According to the particle-bubble collision probability theory, reducing the bubble diameter or increasing the apparent particle size is an effective measure to increase the collision probability between fine particl...

AI Technical Summary

Problems solved by technology

The coarse-grained minerals in the carrier flotation process generally need to be recycled. After a long time of interaction with the fine-grained pulp, its surface is easily covered by fine gangue minerals and loses its "activity", which eventually leads to the loss of carrier particles in the flotation tailings. , deteriorating carrier flotation efficiency

In the conventional carrier flotation process, fine particles have large specific surface area and high apparent energy, and will reduce their own surface energy through adsorption with target minerals, gangue minerals, and pharmaceuticals, resulting in a large number of gangue particles mixed in the carrier-fine particle aggregates In this way, the quality of the concentrate will be deteriorated and the dosage of flotation agents will be increased

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