公开(公告)号：US20210094045A1

公开(公告)日：2021-04-01

申请号：US15733895

申请日：2019-04-22

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Xiahui GUI ,  Min LIU ,  Yaowen XING ,  Yangchao XIA ,  Yijun CAO ,  Jiaqian LUO ,  Peikun LIU ,  Zhigang WANG

IPC: B03B9/00 ,  B03B7/00

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding raw coal into a special underground compact jigging machine to discharge overflow clean coal being dewatered through a φ1 mm fixed screen and screened through a φ13 mm classifying screen, and dewatering powder clean coal with a particle size less than 13 mm to obtain powder clean coal and a centrifugate; grading jigging middling coal by means of a φ13 mm classifying screen into block middling coal and powder middling coal, and dewatering the powder middling coal to obtain powder middling coal and a centrifugal liquid; and sending produced coal slime water to a water medium classifying and separation cyclone, and the obtained coarse middling coal slime and coarse clean coal slime respectively passing through a coarse middling and clean coal slime sieve bends, and then being dewatered.

公开(公告)号：US20210162427A1

公开(公告)日：2021-06-03

申请号：US17059476

申请日：2019-04-22

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Xiahui GUI ,  Min LIU ,  Yaowen XING ,  Yangchao XIA ,  Yijun CAO ,  Jiaqian LUO ,  Peikun LIU ,  Zhigang WANG

IPC: B03B9/00 ,  B03B7/00

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding exploited raw coal into a Φ25 mm raw coal classifying screen for screening; performing dry coal preparation on a classifying screen oversize product with a particle size greater than 25 mm and feeding a classifying screen undersize product with a particle size less than 25 mm into a special underground compact jigging machine for sorting to obtain jigging machine overflow clean coal, jigging middling coal and jigging gangue; screening and dewatering the jigging machine overflow clean coal to obtain a clean coal product, and screening and dewatering the jigging middling coal to obtain a middling coal product, sorting slime water to be sorted and generated during sorting to obtain coarse clean coal slime and coarse middling coal slime, and performing circulating water treatment on a final liquid.