DIFFERENTIAL FLOTATION OF COMPLICATED SULFIDE ORE

摘要

PURPOSE:To separate a copper concentrate and a zinc concentrate excellent in a grate at good yield by flotation, by selectively controlling zinc sulfide mineral and iron sulfide mineral while floating copper sulfide mineral in a complicated sulfide ore containing sulfide minerals. CONSTITUTION:In separating a copper concentrate and a zinc concentrate from a complicated sulfide ore by differential flotation, the solid concn. of an ore solution consisting of a raw ore after grinding and water or that of an ore solution of a bulk concentrate obtained by perfoming bulk-differential flotation to the aforementioned ore solution is adjusted to 45-80wt%. Subsequently, sodium sulfide is added to said ore solution in an amount of 0.2-3kg per a ton of the ore to perform conditioning and, thereafter, zinc sulfate 1.5-3.5wt. times sodium sulfide and 1.5-10kg/ton of the ore of sulfur dioxide gas are added to said ore solution while 50Z-200m3 per a ton of the ore of air is blown thereinto to further perform conditioning. Thereafter, flotation agents such as a collector and a frother are added to the ore solution to separate a copper concentrate and a zinc concentrate by flotation.