MG-9#捕收剂在极细粒煤泥浮选中的应用

Application of the MG-9#collector in ultrafine coal flotation

为解决柴油对浮选入料中极细粒煤泥的选择性较差,造成浮选精煤灰分高,导致重介主选精煤“背灰”问题,石板选煤发电厂通过小浮选试验、工业性浮选试验,探索了MG-9#捕收剂代替柴油浮选极细粒煤泥的可行性。生产实践表明:应用MG-9#捕收剂后,浮选精煤灰分降低了0.18个百分点,尾煤灰分增加了4.08个百分点,浮选精煤快灰稳定率增加了9.75个百分点,浮选药剂用量下降了16.79%,取得了较好的经济效益和社会效益。

Because of the low selectivity of diesel oil in flotation of ultrafine coal slime contained in the flotation feed,the concentrate product of the plant's flotation system is high in ash,and the heavy medium separation system has to reduce the ash of its clean coal product to an unnecessarily low level.To address this issue,both bench-scale and industrial flotation tests are conducted by the plant to explore the feasibility of using the new-type MG-9#collector for flotation of the ultrafine coal in place of the diesel oil.Practice shows that the use of the new collector has led to a drop of ash of flotation concentrate by 0.18 percentage point,an increase of ash of tailings by 4.08 percentage points,an upsurge of rate of stabilization of concentrate ash by 9.75 percentage points and a reduction of consumption of reagent by 16.79 percentage points,yielding a favorable social and economic result for the plant.