Study on Separation of Sulfur and Arsenic from a Gold-bearing High Arsenic Sulfur Concentrate
Aiming at the problems that the arsenic content of a gold-bearing sulfur concentrate in An-hui is too high(up to 5.05%)to be sold,an arsenic-sulfur separation test was carried out.The results show that pyrite is preferentially floated with activated carbon as de-reagent,lime as pH regulator,ZJY-7 as in-hibitor,butyl xanthate as collector and 2#oil as foaming agent.The flotation tailings were ground to-0.074 mm accounting for 82.37%.After one roughing and one scavenging magnetic separation of arsenopyrite and pyrrhotite,a marketable sulfur concentrate with sulfur content of 52.16%,arsenic content of 0.48%,gold content of 1.86 g/t,sulfur recovery rate of 14.32%,sulfur and iron concentrate with sulfur content of 35.81%,arsenic content of 0.63%,gold content of 0.61 g/t,sulfur recovery rate of 64.08%,and gold-bearing arsenic concentrate with arsenic content of 16.46%,gold content of 8.14 g/t,arsenic recovery rate of 91.25%,gold recovery rate of 80.22%,and total sulfur recovery rate of 78.40%were obtained.The test results can provide reference for the treatment of high arsenic gold-bearing sulfur concentrate in similar mines.
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