Coal slime flotation process capable of realizing cyclic utilization of flotation agent

Abstract

The invention provides a coal slime flotation process capable of realizing cyclic utilization of a flotation agent. The coal slime flotation process mainly relates to a coal slime flotation device, apressure filter, an air flotation device, a flotation agent barrel and the like and mainly comprises the following steps that flotation clean coal enters a flotation clean coal barrel; a material obtained after the flotation clean coal is dewatered through the pressure filter is used as a final clean coal product, and filtrate enters the air flotation device; froth on the upper layer of the air flotation device is transferred and then fed into a flotation feeding pulping device; and residual filtrate in the air flotation device enters a circulating water pool. The coal slime flotation processcapable of realizing cyclic utilization of the flotation agent has the advantages that the flotation agent distributed in the filtrate of the flotation clean coal is concentrated and recovered throughmicro bubbles and is then returned into a flotation system so as to be reused, the process is simple and easy to implement, and the adaptability is high. By adoption of the coal slime flotation process capable of realizing cyclic utilization of the flotation agent, agent consumption in the coal slime flotation process can be effectively reduced by 10% or over, the content of residual fine coal slime in circulating water can be reduced, and the quality of the circulating water is improved.

Description

technical field [0001] The invention belongs to the field of flotation coal preparation, and relates to a chemical agent recycling process in the flotation coal preparation process, in particular to a coal slime flotation process based on the recovery and recycling of the flotation agent. Background technique [0002] Flotation is the most effective, economical and mature method for -0.5mm coal slime. In the future, with the improvement of fully mechanized coal mining and the deterioration of coal quality, the production of fine coal slime will further increase. The importance of flotation Sex will also be further highlighted. [0003] Flotation agent is the key factor to improve the buoyancy of combustible body and adjust the stability of bubbles. However, on the one hand, the consumption of flotation reagents has significantly increased the cost of flotation operations. At present, the cost of flotation is more than three times that of gravity operations, which is mainly ...

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Problems solved by technology

[0005] In actual production, some coal preparation plants return the flotation clean coal press filter filtrate to the flotation feed link, and indirectly use the residual flotation agent in the filtrate. However, due to the large flow rate of the filtrate, it is easy to cause the concentration of the flotation feed to decrease. Deterioration of flotation effect

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