The results indicated that the separation between copper and zinc was actualized through which first selecting copper by controlling zinc through rational combination of Na2S,ZnSO4 and Na2SO3,at last selecting zinc from copper tailing using preferential flotation flowsheet.

Some copper is preferentially floated firstly with ERAZII as capture agent, then the copper and lead co-preferential flotation is conducted, and finally the copper concentrate and lead concentrate are separated from the mixed concentrate.

The small and pilot scale tests of separating lead,Zinc from cyanide tail are described,Adopting preferential flotation method to recover lead, zinc from cyanide tail open vast vista in the similar mines.

Enhancement of copper and gold concentrates indexes by using selective flotation process;

Experimental results showed that applying selective flotation process and optimum reagent condition can efficiently separate the lead-zinc minerals and obtain lead concentrate of 63.

In view of the characteristics of the PbZn sulphide ore of fine dissemination size and complicated intergrowth relations,a flotation flowsheet was put forward,which consists of selective flotation of lead minerals with Na_2CO_3 and ZnSO_4 as regulators,DZ as zinc depressant,ammonium dibutyl dithiophosphate as collector,and zinc flotation using CuSO_4 as activator,butyl xanthate as collector.

Through experimentation and research in this ore,we use flotation and magnetic dressing, and part of amalgamate flotation,and chose amalgamate concentrate of copper and lead, then asunder copper and lead,and flotation zinc and sulphur,and flotation rejection,and magnetic dressin.

Based on the mineral characteristics and our experience on recovering copper minerals, by using new technological flowsheet of Cu-preferential flotation, ZM as Cu collector, starch as depressant of Pb minerals, the problem on separating Cu-minerals from Pb-minerals has been solved.