Method for selecting coal by using water medium swirler

Abstract

The invention relates to a method for selecting coal by using a water medium swirler. Raw coal is classified by a grading sieve, materials above 3 mm are crushed to be less than 3 mm through a crusher, the raw coal is subjected to water injection mixing under the grading sieve of 3 mm or less, and enters a high-frequency linear vibrating screen for desliming and grading, and after grading, materials which are larger than 0.063 mm enter a water medium gangue discharge cyclone to remove gangue, the underflow materials enter the gangue dewatering screen, the oversize products are gangue, are conveyed into a gangue field, and then enter an inner circulating water system to be recycled again, the overflow materials enter a final coal coarse slime grading sorting unit, the separated overflow materials enter a clean coal dewatering screen, the oversize products are refined coal and enter a clean coal field, the sieved water enters the inner circulating water system to be recycled again, the separated overflow materials enter the tail coal coarse coal slime unit to be sorted again, and the overflow materials of the waste rock swirler in the water medium is dehydrated through a middling coal dewatering screen; and the materials on the sieve are middling coal and are sent into a middling coal field, and the sieved water enters an inner circulation water system to be recycled.

Description

technical field [0001] The invention relates to a coal preparation method of an aqueous medium cyclone, in particular to the technical field of coal preparation equipment. Background technique [0002] The original jigging coal preparation method is to carry out the coal preparation process according to the difference in particle density in a vertically pulsating medium. The medium of jigging coal preparation is water or air, and some suspensions are also used. Hydraulic jigging is the most used in coal preparation. The jigging coal preparation method is to use the principle of jigging separation to separate the selected raw materials into clean coal, medium coal and gangue according to their density. Disadvantages: The by-products include medium coal, fine coal and slime tailings with relatively high fineness rate. [0003] The original dense medium coal preparation method is to prepare coal according to the difference in particle density in a medium with a density great...

AI Technical Summary

Problems solved by technology

Disadvantages: the by-products of medium coal, fine coal and slime tailings have a relatively high concentration rate

The disadvantage of dense medium coal preparation is that the production process is complicated, the production cost is high, the equipment wears out quickly, and the maintenance volume is large; the disadvantage: the fineness rate of the fine coal and slime tailings in the by-products is relatively high

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