高气泡表面积通量浮选柱浮选硫化铜矿参数的研究

Flotation Parameter Investigation of Copper Sulfide Ore by Flotation Column with High Bubble Surface Area Flux

通过浮选硫化铜矿的研究,检验高气泡表面积通量浮选柱的浮选性能,优化主要结构参数和操作参数。研究表明,高气泡表面积通量浮选柱采用多段相互独立的发泡器,可以在表观充气速率较高的情况下,不增大气泡直径,而增加气泡数量,从而有效地增大气泡表面积通量,并且减少了气泡在浮升过程中兼并的可能性,避免了疏水颗粒的脱落和因气泡携带能力不足导致的回收率损失,对分选效率的提高有着十分显著的效果。高气泡表面积通量浮选柱浮选硫化铜矿,在精矿品位下降不大的情况下,回收率可提高10个百分点以上。

The flotation performance of the flotation column with high bubble surface area flux is verified and the main structural and operation parameters of the column are optimized by investigation of the copper sulfide ore floatation. The results show that the column with independent muhi-spargers generates sufficient and very fine bubbles, that is, increase the numbers of the bubble without the change of the average diameter of the bubble, at high superficial gas velocity. Consequently, the independent muhi-spargers increase the bubble surface area flux of the column effectively. The column flotation with high bubble surface area flux can also decrease the possibility of bubble coalescence and avoid the loss of recovery of hydrophobic particles due to the insufficient carrying capability of bubbles, which often occure in traditional column flotation. It is concluded that the column flotation with high bubble surface area flux can upgrade the flotation efficiency, which can be attributed to the exploitation of independent multi-spargers. The over 10 percentage of copper recovery is increased for copper sulfide ore floatation by using the flotation column with high bubble surface area flux at similar concentrate grade.