Effect of two-stage stirred pulp-mixing on coal flotation
,
 
,
 
,
 
 
 
 
More details
Hide details
1
China University of Mining & Technology
 
2
Chinese National Engineering Research Center of Coal Preparation and Purification
 
 
Publication date: 2014-01-01
 
 
Corresponding author
Xiahui Gui   

School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
 
 
Physicochem. Probl. Miner. Process. 2014;50(1):299-310
 
KEYWORDS
ABSTRACT
Stirred pulp-mixing is performed before coal flotation. In this study, a two-stage stirred pulp-mixing tank was designed based on the single-stirred process to intensify the mixing effect of pulp and flotation reagents. A tank has a pitched-impeller opening-type turbine. Stirred pulp-mixing and flotation experiments were conducted on a sample of anthracite fine coal (-0.5mm) from the Xuehu Coal Preparation Plant in Henan Province, China. The results of the two-stage stirred pulp-mixing were compared with those of a single-stage stirred pulp-mixing in terms of flotation performance. Compared with the single-stage stirred pulp-mixing, two mixing areas and double-layer impeller were able to strengthen the energy input to the stirred system, thereby improving the mixing efficiency of flotation reagents and coal particles in the pulp. The two-stage stirred pulp-mixing significantly increased the flotation feed rate of the cyclone-static micro-bubble flotation column and concentrate yield, enhanced the combustible matter recovery effect of coarse particles at a suitable flotation feed rate, and ensured the recovery effect of fine particles at high flotation feed rate.
eISSN:2084-4735
ISSN:1643-1049
Journals System - logo
Scroll to top