Pre-selection efficient size mixing method suitable for wide-size-fraction flotation

Abstract

The invention discloses a pre-selection efficient size mixing method suitable for wide-size-fraction flotation. The pre-selection efficient size mixing method is suitable for peat check. The method includes following steps: firstly, wide-size-fraction ore pulp is fed through ore pulp feeding ports in the two sides of a pulp mixing barrel to form high-speed jet flow, wherein the high-speed jet flowenters from the inlet end of a dosing pipe of a Venturi tube structure to form negative-pressure area ore pulp, a collecting agent and a foaming agent are self-sucked into the negative-pressure areaore pulp in a Venturi vertical pipe structure to be emulsified, and the cavitation phenomenon occurs in the ore pulp; then, ore pulp jet flow openings in the two sides of the ore pulp inverted halfpace structure are tangentially jetted and fed into the bottom of the pulp mixing barrel to form upward strong rotational flow, and the rotating direction of a rotating impeller on a stirring shaft in the pulp mixing barrel is controlled to be always opposite to the strong rotational flow direction to guarantee ore pulp reverse flow; upward strong rotational flow ore pulp and the rotary impeller formcountercurrent pulp mixing in the forced stirring area, stress distribution is reduced through the annular shearing partition plate and the flow guide plate, equipment stability is improved, meanwhile, the auxiliary shearing effect on the strong rotational flow ore pulp moving upwards is achieved, so that the pulp mixing effect is improved. The method is simple, and the size mixing effect is good.

Description

technical field [0001] The invention relates to a pre-selection high-efficiency slurry adjustment method, in particular to a pre-selection high-efficiency slurry adjustment method suitable for wide particle size flotation used in peat re-selection. Background technique [0002] Flotation is the most economical and effective separation method for coal and mineral resources, and it has made outstanding contributions to the large-scale recovery of valuable resources in fine-grained low-grade coal and ores. The flotation process is carried out by using the surface and interface properties of the particles. The particles with good surface hydrophobicity are easy to attach to the air bubbles and float up as concentrates, while the hydrophilic gangue particles are left in the pulp and discharged as tailings. With the widespread application of mechanized mining and dense media beneficiation technology, problems such as large amount of floating coal slime, large content of intergrowt...

AI Technical Summary

Problems solved by technology

The traditional mineral flotation slurry mixing equipment is limited by the internal stirring structure, the mixing property of the slurry is weak, the fine particles have a low probability of collision and adhesion with the chemical molecules with strong water, and the adaptability to the feeding conditions of wide-grained coal slime is poor, and it is difficult to effectively remove coarse particles fine mud

The result of low-level pulping increases the burden of subsequent flotation operations, which makes the mechanical agitation intensity in the flotation machine passively increased, worsens the flow field environment during the flotation process, and increases the desorption probability between particle bubbles, which is not conducive to particle flotation recovery

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