STUDY ON FLOTATION OF THE OXIDE ORE IN TONGLUSHAN MINE WITH MIXED XANTHATES

The oxide ore containing An (Ag),Cu (Fe)in Tonglushan Mine Field belongs to the refractory ore with high oxidation rate and high slime content. When mixed xanthate CES formed by the combination of variotls xanthates is applied in the flotation of the oxide ore,it has the advantages of high collection Power and fast flotation speed.Compared with isobutyl xanthate applied in the mineral processing mill, on the basis of the same grade of the concentrate(containing Cu18%, An10g/t and Ag90 g/t),the reco-very of Cu can be increased by 6.70%,that of An by 9.33% and Ag by 5.67;the corresponding recovery has reached 81. 28% for Cu,84.00% for An and 66.83% for Ag,respectively. The reason lies in the fact that mixed xanthate CES not only maintains the original characteristics of each xanthate constituent but also gives full play to the synergistic effect among various xanthates.Our study has provided a new mixed collector for the same category of ores in flotation of copper minerals and recovery of the associated gold and silver.