A process for re-lifting coal in coking coal

Abstract

The present invention relates to a coking coal middle coal re-extraction process, comprising: step S1, using the middle coal grading screen to classify the middle coal in the main system to a particle size of 25 mm, and washing the middle coal and the middle coal; and step S2, sorting the middle coal to obtain The re-lifted medium-ash clean coal and the re-lift medium coal are obtained; step S3, the re-lift medium-ash clean coal is dehydrated and dewatered and then put into the re-lift clean coal bin; the re-lift medium coal is dehydrated and de-medium treated and then returned to the original owner Coal in the system; step S4, the coal slime water obtained after the dehydration and mediation treatment of the medium gray clean coal is sorted through the coal slime heavy medium treatment system, and the obtained underflow enters the coal slime treatment system in the main system, and the obtained overflow passes through The magnetic separator conducts deintermediation, and after deintermediation, it enters the flotation machine for flotation, and then dehydrates through the clean coal filter press and then enters the re-extraction clean coal bunker. Therefore, the feeding pressure and centrifugation time can be accurately determined before medium coal sorting and set in advance through the first control valve and time regulator, effectively improving the extraction rate of clean coal.

Description

technical field [0001] The invention relates to the field of secondary washing of clean coal in the coal washing industry, in particular to a coal re-extraction process from coking coal. Background technique [0002] Coal is a non-renewable resource. To maximize the utilization of coal is not only to fully utilize energy, but also to protect environmental protection and energy conservation. How to make full use of the physical and chemical properties of coal, research and invent high-efficiency and high-recovery extraction methods for coal, and have a great impact on mining It is the future development trend of coal washing to eat dry coal and make reasonable use of it. Especially with the development of technology, the application field and scope of coal have begun to undergo fundamental changes, and more and more applications are being applied to fine chemicals and materials. , This requires coal sorting to be more detailed and specialized to meet the different requirement...

AI Technical Summary

Problems solved by technology

[0006] For this reason, the present invention provides a coking coal middle coal re-extraction process, which can effectively solve the problem that the feeding pressure and centrifugation time cannot be accurately determined through the suspension concentration and fluid viscosity in the prior art to advance the parameters of the middle coal centrifugal separation. Set up technical issues to improve the extraction rate of clean coal

Images