Experimental Study on the Combination Depressant in the Flotation Separation of Copper and Zinc Minerals

It is a complex polymetallic ore with the recoverable minerals of copper,zinc,tin and sulphur,and the minerals is extremely fine-grain disseminated.Test results show that without changing the grinding condition and reagent regime,by adopting the combination depressant of ZnSO4+Na2SO3+Na2S,through the open-circuit test of once roughing,triple cleaning and once scavenging,the copper concentrate grading 16.5% Cu is obtained,at the recovery of 60.29% Cu,and 6.2% Zn in the copper concentrate.The problem of copper concentrate with low grade and high content of zinc is solved.