禾草沟煤业选煤厂煤泥水系统提质增效改造探讨

The coal slime water treatment system renovated at Hecaogou Coal Company's Coal Washery for improving washing efficiency and upgrading of products

针对干扰床分选机溢流采用弧形筛脱水脱泥效果差、浮选精煤高灰细泥夹带明显的问题,禾草沟煤业选煤厂将采用电磁筛对干扰床分选机溢流精矿进行脱泥,采用螺旋分选机对干扰床分选机尾矿进行扫选,并采用一段粗选、二段精选的两段浮选工艺对浮选系统进行改造。预计改造实施后,粗煤泥分选效果和浮选指标可得到明显改善,总精煤产率可增加1.98个百分点,经济效益显著。

The sieve bend originally used for dewatering and desliming of overflow of tectered-bed separator was poor in efficiency,and the flotation concentrate was found to contain a noticeable amount of fine slime.To address this issue,renovation work is made by the washery through shifting to the use of electromagnetic screen for desliming of overflow of teered-bed separator,the use of spiral separator for scavenging of the separator's tailings product,and the addition of a flotation system consisting of a roughing stage and a cleaning stage.It is predicated that the renovation my lead to noticeable improvement of coarse slime cleaning result and flotation indices,a rise of yield of total clean coal product by 1.98 percentage points and a favorable economic result.