Injection type flotation machine for coal

Abstract

The invention relates to the field of coal slime flotation devices, and concretely relates to an injection type flotation machine for coal. The machine comprises a sorting groove, a feeding pipe and lower guide pipes, an air supply distribution pipe is arranged at the top of the feeding pipe, branch pipes extend out of the air supply distribution pipe, air inlet pipes are arranged on the air supply distribution pipe, nozzles are arranged in the lower guide pipes at air outlets of the corresponding branch pipes, and throat pipes are arranged in the lower guide pipes below the corresponding nozzles; and a false bottom is supported above the bottom face of the sorting groove, an inner groove is formed in the edge of the false bottom in an upward surrounding mode, a turbulent flow grid is horizontally arranged on the inner wall of the inner groove, and the bottom end of each lower guide pipe extends into the space between the turbulent flow grid and the false bottom. Efficient rotary jet flow inflation mixing is reserved, high turbulent flow is limited in the lower guide pipes, the function of the separation groove is converted into the single mineralized bubble and ore pulp separation function, it is guaranteed that the working conditions in the lower guide pipes are the same, and the separation efficiency of the whole flotation unit is improved.

Description

technical field [0001] The invention relates to the field of coal slime flotation devices, in particular to a jet flotation machine for coal. Background technique [0002] Flotation is a widely used technology for sorting fine-grained coal slime, among which jet flotation machine is a kind of flotation machine that is widely used. Chinese utility model CN92229333.3 discloses a jet flotation machine, the working principle of which is as follows: the flotation machine uses the principle of jet suction and micro-bubble precipitation to realize aeration stirring and coal slime separation. After the pretreated coal slurry enters the feeding box at the end of the first tank of the flotation machine, part of it flows directly into the tank of the flotation machine, and the other part enters the circulating pump through the circulating coal slurry port at the lower part of the false bottom. The circulating coal slurry pressurized by the circulating pump enters the mixing chamber of...

AI Technical Summary

Problems solved by technology

[0005] 1. Although the rotary jet aeration mixing efficiency is high, the collision mineralization efficiency in the sorting tank is low

[0006] 2. The highly turbulent flow in the sorting tank may increase the shedding rate, affecting the flotation effect and the stability of the foam layer

[0007] 3. The gas inflation volume of the four mineralizers set in each sorting chamber is adjusted separately, resulting in inconsistent working conditions of the four mineralizers, resulting in that the pulp entering the sorting chamber cannot obtain equal mineralization intensity

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