Experimental study on value-added utilization of coal slime by deep flotation deashing and upgrading
After deep cleaning and upgrading of coking coal slime,high-quality clean coal products can be used as raw material for preparing coke.Thus,the value-added utilization of coking coal slime can be realized effectively.The flotation test of coking coal slime from a coal washing plant in Inner Mongolia was carried out.The influence of differ-ent grinding fineness,collector and inhibitor on flotation test results were investigated,the flotation test flow was opti-mized.The results showed that the control grinding fineness of＜0.075 mm accounted for 97.12％,the collector M231 was used for collector,the inhibitor D821 1was used for inhibitor,the"one roughing,one scavenging,three cleaning"process test flow with cleaning scavenging separation was adopted.According to the characteristics and properties of slime,the whole process closed-circuit flotation test was carried out to obtain clean coal and tailings products.The ash content of clean coal is less than 12％,and the ash content of tailings is more than 82％.The clean coal products can meet the requirements of coking raw materials,the tailings can be used as building materials,and value-added utilization and efficient recovery of coking coal slime with deep deashing and upgrading can be realized.
万方数据
维普
