2011•Multipurpose Utilization of Mineral ResourcesRequires access
Research on Mineral Processing and Metallurgical Technology for a Refractory Gold Ore
Mao Yi-lin
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Abstract
A low-grade gold ore in Gansu was oxidized seriously,the gold minerals of which were mainly disseminated among the limonite particles and in the cracks and holes filled with clay minerals,in the form of micro-particles and submicro-particles.Therefore,it belongs to a refractory ore.Aimed at the ore properties,the two kinds of technological flowsheets of all-slime cyanidation leaching of gold and flotation concentration-cyanidation leaching of gold were carried out.The results show that when the technological flowsheet of all-slime cyanidation leaching of gold was adopted,the leaching rate of gold was 94.19%,and when flotation concentration-cyanidation leaching of gold was adopted,the leaching rate of gold and silver was 97.62% and 90.80% respectively.Because the technology of discarding tailings via flotation can increase the efficiency of the leaching equipments and the economic benefits,the technological flowsheet of flotation concentration-cyanidation leaching of gold was recommended for the gold ore.