METALS RECOVERY FROM MOLYBDENITE CONCENTRATE BY ELECTROOXIDATION AND LEACHING

Abstract

Abstract Mineral resources today are increasingly determined by the concept of “persistent”. The reason for their difficult opening is in the composition of sulfide nature, leading to passivation of the surface and inhibition of hydrometallurgical processes. The way out in practice was found in oxidative firing and some other technologies. The work compares the results of leaching of molybdenite concentrate of Almalyk MMC JSC according to the schemes: the existing calcining-ammonia and non-calcining with nitric acid, hypochlorite opening and leaching. Non-calcining with hypochlorite opening and leaching scheme is not only ecologically cleaner in compare with pyro-metallurgy, but it relocates quantitatively to the solution not only molybdenum, rhenium, but gold and silver as well.