USE OF THIOURACILS AS SELECTIVE DEPRESSANTS FOR THE FLOTATION SEPARATION OF COPPER AND NICKEL SULPHIDE MINERALS

摘要

CIL 580 FOR THE DISCLOSURE A process is disclosed for separating nickel sulphide minerals from copper sulphide minerals with which they are associated in a metallurgical concentrate through use, as nickel sulphide depressant, 2-thiouracil or 6methyl-2-thiouracil. As compared with conventionally used sodium cyanide, the new proposed depressants provide equal or superior metallurgy, are less pH dependent and allow greater flexibility in floatation circuit conditions.