US 12,115,539 B2
Wide-size-fraction flotation system and process
Yaowen Xing, Jiangsu (CN); Xiahui Gui, Jiangsu (CN); Shihao Ding, Jiangsu (CN); Mengdi Xu, Jiangsu (CN); Yijun Cao, Jiangsu (CN); Youfei Zhang, Jiangsu (CN); and Yangchao Xia, Jiangsu (CN)
Assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY, (CN)
Appl. No. 17/043,600
Filed by CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Jiangsu (CN)
PCT Filed Sep. 24, 2019, PCT No. PCT/CN2019/107441
§ 371(c)(1), (2) Date Sep. 29, 2020,
PCT Pub. No. WO2020/181758, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 201910195192.9 (CN), filed on Mar. 14, 2019.
Prior Publication US 2021/0402414 A1, Dec. 30, 2021
Int. Cl. B03D 1/02 (2006.01); B03B 5/28 (2006.01); B03B 7/00 (2006.01); B03B 9/00 (2006.01); B03D 1/14 (2006.01); B03D 1/24 (2006.01)
CPC B03D 1/028 (2013.01) [B03B 5/28 (2013.01); B03B 7/00 (2013.01); B03B 9/005 (2013.01); B03D 1/1418 (2013.01); B03D 1/24 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A wide size fraction flotation process for coal washing and ash removal, comprising the following steps:
in step 1: feeding coal slime to be floated into an agitator, adding water into the agitator, agitating and mixing the floating coal slime with the water to a homogeneous state, and feeding the mixture into a classifying cyclone by a first feeding pump for pre-classifying;
in step 2: after the coal slime is classified in the classifying cyclone, feeding the overflow from the classifying cyclone into a flotation column by a second feeding pump for flotation, discharging the flotation tailings through an underflow port of the flotation column, while collecting the flotation concentrate through an overflow port of the flotation column and feeding the collected flotation concentrate into a bubble generator by a fourth feeding pump, and feeding the flotation concentrate into a hydraulic flotation machine through the bottom of the hydraulic flotation machine via the bubble generator; and
in step 3: after the coal slime is classified in the classifying cyclone, feeding the underflow in the classifying cyclone into a hydraulic flotation machine by a third feeding pump for recovery by flotation.