煤泥磨矿分级浮选及高岭土回收试验研究

为提高浮选精煤质量和产率,充分利用煤系伴生矿物,通过对林西矿选煤厂浮选入料进行磨矿解离和浮选试验研究,制定了"浮选入料磨矿+旋流器分级脱泥+旋流器底流浮选+旋流器溢流磁选"提纯回收高岭土工艺流程.该工艺控制浮选入料磨矿细度为＞0.037 4 mm占60％,对解离后的浮选入料依次采用φ150、φ75、φ50、φ10 mm...

Experimental study on flotation of milled and classified fine slime and recovery of kaolinite

For enhancing flotation concentrate quality and yield,and making full use of associated coal-measure mineral,a study is made by Linxi Coal Preparation Plant on flotation of fine coal after it is liberated through grinding.Based on study result,a combined process of flotation of milled feed+classification and desliming with cyclone+cyclone underflow flotation+magnetic separation of cyclone overflow for purification and recovery of kaolinite,is proposed.The milled flotation feed with the 0.0374 mm size accounting for 60%of the total is sent sequentially to theФ150,Ф75,Ф50 andФ10 mm small-conical-angle cyclones for classification and desliming.The underflow materials of the cyclones are then treated through flotation.The overflow of theФ10 mm cyclone is purified through high-gradient magnetic separation.The refined material is finally caleinated at a temperature of 980℃.Test result shows the use of the proposed process makes it possible to create not only a favorable flotation condition,improved flotation efficiency and concentrate quality because of the effective separation of fine clay,but also a possibility to recover kaolinite.The application of the combined process proves to be a new approach for comprehensive utilization of ultrafine high-ash coal.