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Optimization of thickening process in coal slime treatment
Author(s): 
Pages: 899-904
Year: Issue:  5
Journal: Journal of China University of Mining & Technology

Keyword:  coal slimehydro-cycloneclassified thickeningtwo-stage thickening;
Abstract: Because of the poor thickening efficiency of coal slime,high concentration of effluent water and accumulation of fine slime in the coal preparation system in China,a novel coal slime treatment process was proposed.A hydro-cyclone was added before thickener to pretreat coal slime.The classified thickening or two--stage thickening was selected according to the concentration of hydro-cyclone underflow.Experimental results show that the thickening efficiency and solid recovery of underflow for the two-stage thickening are 68.23%and 82.98%,respectively.The counterparts for classified thickening are 66.32%and 81.74%,respectively.The counterparts for conventional thickening are 63.92%and 79.39%,respectively.Both the twostage and classified thickening perform better than conventional thickening in coal slime treatment.Especially,the two-stage thickening process achieves the best performance.
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