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HYDROMETALLURGICAL TECHNOLOGY FOR GOLD RECOVERY FROM REFRACTORY GOLD-BEARING RAW MATERIALS AND THE SOLUTION TO PROBLEMS OF SUBSEQUENT DEHYDRATION PROCESSES

Abstract

Development of the gold mining industry is associated with serious problems caused by deterioration of the quality of gold-bearing ore. Since rich ores are gradually depleted, lowgrade ores as well as those with more complex composition and concentrates come on stream (are used as raw materials). Therefore, the gold recovery from refractory gold-bearing raw materials becomes the most important problem. This article discusses various processing methods of refractory pyrite-arsenopyrite ores and concentrates, considering their advantages and disadvantages. These methods include the conventional technology, bio-oxidation, as well as high-temperature and low-temperature leaching with subsequent cyanide treatment. The drawbacks of these methods include the problems associated with the separation of the solid and liquid phases. Dehydration processes are an integral part of hydrometallurgical technologies. Ineffective phase separation process can lead to performance degradation of equipment and increased power consumption. The authors consider solutions to the problems related with the efficiency improvement of raw materials and the comprehensiveness of their use.

SVETLANA A. IVANIK AND DMITRY A. ILYUKHIN

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