新疆某黄铁矿型低品位金矿石浮选试验

新疆某低品位黄铁矿型金矿石中，脉石矿物蚀变严重，矿泥含量较高，对载金矿物的上浮影响较大。通过强化对矿泥的分散和脉石矿物的抑制，以及对载金矿物的活化和捕收研究，确定了碳酸钠+水玻璃作调整剂、硫酸铜作活化剂、异戊基黄药+丁铵黑药作组合捕收剂、RB-3作起泡剂的药剂制度，采用现场2粗2精3扫流程处理金、银品位分别为1.49 g/t和6.11 g/t的试样，可获得金品位为20.07 g/t、金回收率为67.49%、银品位为42.45 g/t、银回收率为34.81%的金精矿。

Flotation Experimental Research on a Low-grade Pyritic Gold in Xinjiang

Due to serious alteration of gangue mineral in a low-grade pyritic gold in Xinjiang province，and the high content of gangue slime has strong impacts on the flotability of gold-carrier mineral. This problem could be properly solved by adopting methods as strengthening the dispersion of the slime and inhibition on gangue，and reinforcing the activation and collection on gold-carrier mineral. By using sodium carbonate and soluble glass as the combined modifier，copper sulfate as activator，isoamyl-xanthate and dithiophosphate BA as the combined collector，the RB-3 as frother，a closed-circuit flotation flowsheet consisting of two roughings，two concentratings and three scavengings has been performed. The original grades of gold and silver are 1.49 g/t and 6.11 g/t separately for the run-of-mine ore，the grade and recovery of gold in the concentrate of closed-circuit test have attained 20.07 g/t and 67.49%，while the grade and recovery of silver have reached 42.45 g/t and 34.81%.