A low-grade high-sulfur copper ore from Anhui Province has a sulfur grade of 41.30％and a copper grade of 0.53％.It is difficult to control the flotation index of this easy-to-oxidize ore.To improve the Cu/S separation effect,the influence of grinding fineness,reagent type and reagent dosage on copper flotation index was investigated.A closed-circuitflotation process including one stage of roughing,two stages of cleaning and two stages of scavenging was adopted to treat the ore with a grinding fineness of 83.88％-0.074 mum,with CaO and Na2S as a combined depressant,Z-200 as the collector and terpenic oil as the frother.It is found that a copper concentrate grading 15.27％Cu at 80.96％recovery can be obtained.This experimental study can provide a reference for flotation separation of copper from low-grade high-sulfur copper ore.
维普
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