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The effect of the collector and its blends on sequential flotation of a complex lead-zinc ore has been investigated. Lead-zinc ore collected from Rajasthan, India showed the presence of PbS-2.21%, ZnS-5.92%, FeS 2 -8.03%, SiO 2 -20.21%, Al 2 O 3 -5.25%, MgO-10.53%, SO 3 -6.48% and CaO-22.16%. The copper and silver were also traced as minor fractions. Xanthates of different alkyl chain lengths as a collector (individual or mixture in various proportions) were used in the lead circuit to evaluate valuables’ performance in the mineralized pulp. The study could enhance the lead and zinc grade up to 27.95% and 22.6% using PEX (potassium ethyl xanthate) and SIPX (sodium isopropyl xanthate) as a blend. The best overall performance in the recovery of lead and zinc was 74.39% and 82.23%, respectively. However, the studies carried out with individual collectors, PEX and SIPX, showed their best result: 22.06% lead and 20.99% zinc grade, 60.54% lead, and 78.73% zinc recovery. The study confirms the synergies between the two alkyl chain length xanthates in the blend.

Flotation behavior of a complex lead-zinc ore using individual collectors and its blends for lead sulfide