Abstract
A representative Pb-Zn-CaF2 ore sample subjected to this experimental study was taken from Niujie lead-zinc complex, Honghe municipality, Yunnan province, China. The ore sample assays 2.49% Pb, 1.05% Zn, 43.20% CaF2 and 136g/t Ag. In this paper, process mineralogy, Pb-Zn minerals separation and fluorite flotation were investigated, and the optimum reagent dosages for the differential flotation were determined. Three concentrates can be obtained, i.e., the lead and zinc concentrates containing 71.10% Pb (3389.65g/t Ag) and 50.06% Zn (301.23g/t Ag) at the recoveries of 89.02% and 84.20%, respectively; and a fluorite concentrate assaying 97.22% CaF2 with 93.76% recovery. Total Ag recovery in lead and zinc concentrates is as high as 91.55%.
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