PROCESS FOR LIBERATING AND SEPARATING SLACK MIDDLING OBTAINED FROM COKING

WIPO Patent Application WO/2017/161922

A1

The present invention relates to the technical field of coal liberation and separation. Disclosed is a process for liberating and separating difficult-to-separate high-ash slack middling obtained from a coking process. The technique comprises: crushing a slack middling feed (1) in a crushing apparatus (A); separating the crushed material using a spiral separator (B) which discards part of the material with higher density and feeds a lower density material into a particle mill (C); classifying the ground material with a three-product cyclone classifying screen (D), moving an overflow and an undersized material of the classifying screen (D) to a flotation separation system, and returning an underflow to the spiral separator (B) for another round of separation and liberation. The invention provides higher separation density. Spiral separation and discarding of a tailing prevents a high ash particle from entering the mill, thereby reducing the workload of the mill and preventing contamination of a clean coal caused by pulverization of the high ash particle.

GUI XIAHUI (CN)
CAO YIJUN (CN)
XING YAOWEN (CN)
YANG ZILI (CN)
XU XUEHONG (CN)

PCT/CN2016/109364

September 28, 2017

December 12, 2016

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UNIV CHINA MINING & TECH (CN)

B02C21/00; B02C23/14; B03B9/00

CN105797831A	2016-07-27
CN105728155A	2016-07-06
CN104722390A	2015-06-24
CN102861663A	2013-01-09
CN103623932A	2014-03-12
CN103920582A	2014-07-16
CN103143432A	2013-06-12
US4505435A	1985-03-19

NANJING RUI HONG PATENT AND TRADEMARK OFFICE LLP (CN)

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