泉店选煤厂浮选系统改造

Transformation of flotation system in Quandian coal preparation plant

通过分析泉店选煤厂原浮选系统工艺流程,提出了选煤厂主要存在浮选尾煤灰分低,浮选药耗高,浮选系统处理能力偏低,浮选床效率低,浮选精矿池泡沫量大等问题。针对选煤厂存在的问题,提出2种改造方案,并最终确定采用新建浮选车间并安装2台浮选机替换原有浮选床的改造方案。改造完成后,泉店选煤厂浮选尾煤灰分、精煤产率和可燃体回收率分别提高了55.61%,43.86%和44.51%,精煤灰分降低了0.29%,药剂用量减少了0.22 kg/t;浮选精矿池泡沫量明显降低,加压过滤机上料情况明显好转,处理量增大,且减少了1台空压机的使用;选煤厂每年增加精煤收益,节省电费和药剂费用总计12770.74万元。

Before transformation,there were lots of problems existed in flotation system of Quandian coal preparation plant,such as low ash in tailings,large flotation reagents consumption,low processing capacity and a large number of mineral bearing froth in concentrates pool.The better transformation method is to build a new flotation workshop and replace flotation bed with two flotation machines.The results show that,the ash in tailings,clean coal yield,combustible material recovery increase by 55.61 percent,43.86 percent,44.51 percent respectively,the clean coal ash,flotation reagents consumption decrease by 0.29 percent,0.22 kg/t.The mineral bearing froth reduce remarkably.The increase processing capacity of pressure filter leads to one air compressor application.The incremental clean coal,saving electrical charge and flotation reagents amounts for 127.7074 million yuan.