Coarse slime separation method and equipment thereof

Abstract

The invention relates to coarse slime separation, in particular to a coarse slime separation method and equipment thereof. The defects and problems existing in an existing coarse slime separation method based on TBS are overcome. The coarse slime separation method is realized by the following steps: 1) sorting coarse slime by TBS; 2) feeding TBS overflow into an electromagnetic high-frequency vibrating screen for pre-dehydration; 3) finally dehydrating the oversize product of the electromagnetic high-frequency vibrating screen by a coal slime centrifuge to obtain a clean coal product, and feeding the undersize products of the electromagnetic high-frequency vibrating screen into a flotation process link or a tailing treatment process link for subsequent treatment. Through combination of theTBS and the electromagnetic high-frequency vibrating screen, the defects in the prior art are overcome, the investment is low, the system is simple, the energy consumption is remarkably reduced, production management is facilitated, the electric energy consumption is reduced by 70%, and the TBS process system is technically innovated and broken through.

Description

technical field [0001] The invention relates to coarse coal slime sorting, in particular to a coarse coal slime sorting method and equipment thereof. Background technique [0002] In my country's coal preparation industry, especially in the field of coking coal preparation, with the maturity and promotion of the three-product full-dense-medium cyclone dense-medium separation technology, coarse coal slime heavy-medium separation has brought a series of problems to coal preparation production, and the long-term Can't solve it well. In recent years, the Teetered Bed Separator (TBS, Teetered Bed Separator), which can effectively supplement the above-mentioned technological deficiencies, has been widely used. mm). TBS overflow means that clean coal products must be further dehydrated to meet the 10-12% moisture quality standard. At present, the TBS overflow dehydration process adopted by various coal preparation plants is as follows: collect it into a TBS product barrel (or poo...

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Problems solved by technology

The process has the following disadvantages: 1. The system is complex and the initial investment cost is high; 2. The maintenance cost and power consumption are high in the later period; 3. The TBS product barrel (or pool) needs a reliable liquid level and concentration stabilization system, otherwise it will easily lead to concentration rotation. The working condition of the flow device is unstable, and the concentration efficiency is poor

4. The curved sieve wears quickly, the dehydration effect is not good before the wear, the feed concentration of the centrifuge is low, and after the curved sieve is used for a period of time, the sieve gap becomes wider, the water running through the sieve is serious, and the product recovery effect is poor

5. A large amount of qualified clean coal enters the flotation system, which increases the flotation pressure

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