Flotation column pulp quadric mineralising method

Abstract

The invention discloses a method for secondary mineralization of flotation column pulp. The method comprises the following steps: (1) an external microporous bubble generator outside a flotation column is utilized to ensure the forced mixing of pulp and bubbles so as to realize the forced mineralization of the pulp in advance in the compressed air pressure of 0.2MPa to 0.6MPa; and (2) after the forced mineralization, the pulp enters the flotation column and produces countercurrent secondary mineralization with bubbles which are generated from the efflux in the compressed air pressure of 0.4MPa to 1.0MPa at the bottom of the flotation column during the process in which the downward current is formed in the flotation column. The mineralization of the pulp in advance and the countercurrent secondary mineralization in bubble column bodies generated from the efflux in the compressed air at the lower part of the flotation column result in the increase of the recovery rate of targeted minerals; simultaneously, secondary formation or multiple formation of bubbles ensures the multiple mineralization of the pulp so that the air content in a capture zone of the flotation column as well as the flotation rate constant are increased and the effective recovery of micronic minerals is realized. The industrial experiment proves that micronic scheelite in flotation tailings which can not be recovered by an agitation impeller flotator can be recovered by using horizontally filled flotation columns obtained by using the method for secondary mineralization of pulp.

Description

technical field [0001] The patent of the present invention relates to a method for flotation of microfine minerals, in particular to a method for effective mineralization of mineral particles and air bubbles. Background technique [0002] In the early 1960s, Canadians Butin and Trebor invented the flotation column, and the flotation column technology has developed rapidly. Such as Canada's CPT flotation column, Australia's Jameson TM Jet flotation column, Microcel, USA TM Micro-bubble flotation column, cyclone-static micro-bubble flotation column and packed flotation column of China University of Mining and Technology. The main structural features of the above-mentioned flotation column are as follows: [0003] The CPT flotation column adopts Slamjet gas generator, which uses 0.5-0.7MPa compressed air, which is fed into the lower part of the flotation column by means of jet flow, and dispersed into air bubbles in the column, and mineralization is formed by the countercurre...

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Problems solved by technology

[0007] The packed flotation column invented by Professor Yang Jinlong uses the corrugated plate to fill the medium, divides the compressed air to form bubbles, and the size of the bubbles generated by it is not uniform; the existence of the stage filling medium increases the resistance of the bubble rising process, and the filling medium reduces The effective volume of the flotation column reduces the slurry throughput of the packed flotation column; in the slurry system, the gap between the corrugated plates is easy to foul and block, which affects the popularization and application of this type of filled flotation column

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