Mechanism of wolframite and combined collectors was disscussed as functions of surface wettability measurements and Zeta potential measurements and interaction between particles.

According to the mineral characteristics,the copper concentrate with grade above 19% and recovery of 70% are obtained by using a new type of highly efficient assembled collector and the process flows with one rough and one cleaning and three sweeps.

While copper-sulphur separation is rather difficult in strong alkaline pulps conditioned by lime,the experiments prove that their separation becomes effective by dereagentization and aeration agitation with the addition of extremely small amount of mixed collectors-butyl xanthate and diethyldithiocarbamate.

Synthesis and application of a fatty acid compound collector;

Three kind of compound collectors named MR 1,MR 2 and MR 3 are made on the base of kerosene.