Sorting device and method for aerating cyclonic micro-bubble flotation column

Abstract

The invention relates to a sorting device and method for an aerating cyclonic micro-bubble flotation column. The device comprises a foam enriching chamber, a foam ore concentrate collecting tank which is arranged on the upper part of the foam enriching chamber, and a shower pipe which is arranged on the top of the foam ore concentrate collecting tank, wherein the cyclonic micro-bubble flotation column is arranged on the lower part of the foam enriching chamber; an aerating sorting chamber is arranged between the foam enriching chamber and the cyclonic micro-bubble flotation column; a conical net is arranged in the aerating sorting chamber; and a plurality of air inlets which are vertical to the conical net side are uniformly distributed on the outer wall of the aerating sorting chamber. By arranging the aerating sorting chamber between the foam enriching chamber and column sorting chamber of the cyclonic micro-bubble flotation column, the high-concentration aerating floatation for theupper easily-floating mine, the middle-concentration column floatation for the middle floatable mine and the pipe-flow turbulence mineralization and cyclonic low-concentration flotation for the difficulty-floating mine are formed. By using the device, the gradient optimizing sorting of earlier aerating flotation for high-concentration easily-floating mine and later cyclonic flotation for difficulty-floating mine are realized, the processing capacity of the flotation column is greatly increased, the chemical consumption is reduced, and the contradiction between the sorting efficiency and the energy consumption is solved.

Description

technical field [0001] The invention relates to a sorting device and method of an air-filled cyclone micro-bubble flotation column, which is especially suitable for sorting coal slime, metal ore and non-metal ore. Background technique [0002] With the improvement of mechanized coal mining, the deepening of mining depth, the deterioration of raw coal quality, and the reform of gravity separation process, the content of primary and secondary fine-grained pulverized coal in raw coal is increasing. Sorting is directly related to the economic benefit of the coal preparation plant. Flotation is currently the most effective method for separating coal slime, but its production cost is the highest link in a coal preparation plant. One of the main reasons is that the flotation concentration is low, the processing capacity is small, and the electricity consumption per ton of coal is high. The commonly used flotation equipment is flotation machine and flotation column. The flotation ...

AI Technical Summary

Problems solved by technology

However, when it is used in easy-to-float coal, flotation with lower concentration requires an increase in the number of flotation columns and equipment investment. If a large-diameter flotation column is used, it will be difficult to transport

When the flotation column is flotation at a high concentration, it is difficult to balance the selectivity and clean coal recovery rate at the same time, which will easily cause low ash content in the flotation tailings, resulting in waste of resources and economic losses

Another kind of inflatable flotation column, its main advantage is that the compressed air generated by the air compressor is fed into the flotation column to realize flotation, and the power consumption is low, but its main problem is the low recovery rate

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