Steam coal separation method

Abstract

The invention provides a steam coal separation method, and belongs to the technical field of coarse coal slime separation. The steam coal separation method comprises the following steps that (1), rawsteam coal is classified through a classifying screen, and classifying screen oversize products are obtained; (2), the classifying screen oversize products obtained in the step (1) are de-slimed through a de-sliming classifying screen, and de-sliming classifying screen oversize products and coal slime are obtained; (3), the de-sliming classifying screen oversize products obtained the step (2) areseparated through a dense-medium separator, and coarse clean coal is obtained; (4), the coarse clean coal obtained in the step (3) sequentially passes through a fixed screen and a medium removing screen, and clean coal I is obtained; and (5), the coal slime obtained in the step (2) is separated through a tri-cone angular cyclone, obtained overflow sequentially passes through an arc-shaped screen and a high-frequency screen, and clean coal II is obtained. According to the steam coal separation method, the coal slime is separated again through the tri-cone angular cyclone to produce the clean coal, the problem that the clean coal is mixed in de-sliming classifying screen undersize coal slime is solved, the recovery rate of the steam coal clean coal is increased, and meanwhile the separationprecision and the hour treatment capability are improved.

Description

Technical field [0001] The invention relates to the technical field of coarse coal slime separation, in particular to a steam coal separation method. Background technique [0002] In order to reduce the amount of coal slime and improve the economic benefits of the enterprise, the current steam coal separation process tends to use 3mm or 6mm grading sieve for dry classification of raw coal, and the materials under the grading sieve are directly sold as fine coal products; After desliming, the desliming grading sieve (sieve hole 2mm) enters the heavy medium shallow trough separator to separate clean coal and gangue products for sale; the coal slime less than 2mm under the desliming sieving sieve is directly dewatered by grading, and finally mixed with powder The sale of coal has caused part of the refined coal to enter the fine coal, and the resources have not been effectively used, resulting in waste of resources and affecting the economic benefits of enterprises. Summary of the ...

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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a kind of thermal coal separation method, the thermal coal separation method provided by the present invention solves the problem of desliming, grading and sieve coal The problem of doping clean coal in the mud improves the recovery rate of steam coal and clean coal. At the same time, it improves the separation conditions of the dense medium separator, and improves its separation accuracy and hourly processing capacity.

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