Double tail-removing gravity-flotation combined sorting method and device

Abstract

The invention relates to a double-tailing discharging gravity-floating combined separation method and a device thereof, and belongs to a double-tailing discharging gravity-floating combined separation method aiming at slime and a device thereof. The aim of the invention is to solve the technical problems existing in the prior flotation machine that the separation effect of ultrafine grains is low and the upper limit of the column flotation is difficult to be effectively related with the lower limit of the heavy medium separation. The method comprises three steps of crude ore flotation and rough separation and graded tailing discharging, gravity scavenging tailing discharging and gravity separation finished ore reflotation. The double-tailing discharging gravity-floating combined separation machine comprises a jet flow flotation column, a first tailing discharging graded device and a secondary tailing discharging graded device; the first tailing discharging graded device is arranged below the jet flow flotation column, a cyclical middling underflow opening of the first tailing discharging graded device is connected with the secondary tailing discharging graded device, and a central ore feeding pipe of the secondary tailing discharging graded device is connected with the jet flow flotation column. The method and the device have multiple effects of coarse slime separation and highly selective floatation of fine coal and ultrafine coal, thereby improving the efficiency of the gravity-floating combined separation.

Description

technical field [0001] The invention relates to a double-row tail heavy-float combined separation method and device, which belongs to a double-row tail heavy-float combined separation method and device for coal slime. Background technique [0002] With the improvement of coal mechanized mining, the content of fine particles in raw coal gradually increases, and more problems arise in the separation of fine coal. Flotation is still the preferred method for fine-grained coal separation, but it is difficult for the commonly used mechanically agitated flotation machines and flotation columns to show consistent advantages in terms of processing capacity, selectivity, and adaptability to particle size. Gravity separation does not need to add reagents, is environmentally friendly, and has low separation cost, but the separation effect on -0.1mm coal particles is poor. The combination of flotation column design concept and multi-force field is an important breakthrough in the histor...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems that the existing flotation machine has low fine particle separation effect, and the flotation upper limit of the flotation column is difficult to effectively connect the lower limit of dense medium separation, and to provide a kind of high-efficiency separation of coal slime with double Double-row tail-heavy-float joint sorting method and device for row-tail characteristics

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