Grading method for recovering refined coal from coal slime

A classification method and clean coal technology, applied in the processing of peat, solid separation, wet separation, etc., can solve the problem of limited market sales, difficulty in adjusting the ash content of clean coal products, and non-adjustable ash content of fine-grained filter slime products and other issues to achieve the effect of improving product quality and reducing ash
CN101757974AInactive Publication Date: 2010-06-30ZIBO WANGZHUANG COAL MINE
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
ZIBO WANGZHUANG COAL MINE
Publication Date
2010-06-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a method for recovering refined coal from coal slime, in particular to a grading method for recovering the refined coal from the coal slime. The method has the technical key points that by using a spiral classifier and the principle that 'sedimentation velocity in the liquid is different due to different particle sizes and specific gravities' of solid particles, the method realizes the separation between relatively high ash component and relatively low ash component by gravity classification; and 25-35% of plus sieve low ash refined coal with larger particle size can be recovered from the relatively high ash component, and 30-40% of minus sieve high ash coal slime with smaller particle size can be removed from the relatively low ash component. Through twice classification, the aim of 'removing the relatively high ash component in the coal slime' can be achieved. The embodiment of the invention can be used for recovering the refined coal from the coal slime, thus achieving the aim of reducing the ash content of the refined coal and meeting the demand of the user.
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Description

technical field

[0001] The invention relates to a method for recovering clean coal from coal slime, in particular to a method for recovering clean coal in coal slime by a classification method. Background technique

[0002] Such as figure 1 As shown, the original production process of the coal washing plant is as follows: the raw coal mined in the mine is lifted by the mine car and poured into the raw coal feeder by the dumper, fed into the raw coal belt by the coal feeder, screened by the raw coal vibrating screen, and the product on the screen After entering the raw coal hand selection belt, the selected lump coal is crushed by a crusher and mixed with the product under the raw coal vibrating screen, and then transferred to the raw coal mine bin; during coal washing production, the raw coal is fed into the belt by the coal feeder under the raw coal bin Transfer to the jig machine for sorting, the selected medium coal and gangue are mixed and transferred to the medium coal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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