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Overview of pretreatment technique of refractory gold ores

Wang Lijun Liu Chunqian (Beijing General Research Institute of Non Ferrous Metals) (Changchun Gold Research Institute,M.M.I.)  
The characteristics of refractory gold ores and the principles of selecting pretreatment program are introduced.The development and new trends of the methods of roast,pressure oxidation and bio oxidation in recent years are summarized.
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