BEHAVIOUR OF ELEMENTAL SULPHUR IN BIOOXIDATION OF GOLD-BEARING SULPHIDE ORES
(1.Institute of Chemical Metallurg; Chinese Academy of Sciences; Beijing 100080；
2.Institute of Microbiology; Chinese Academy of Sciences; Beijing 100080)
2.Institute of Microbiology; Chinese Academy of Sciences; Beijing 100080)
Abstract: The behaviour of elemental sulphur in the biooxidatior process of arsenopyrite and pyrite has been investigated it was found that the α-S0 produced in the bioleaching residue of arsenopyrite was formed by the process of chemical oxidation,while little sulphur was detected in the bioleaching residut of pyrite. The reason of the high consumption of cyanide for the bioleaching residue of Banbishan gold concentrate has been studied and a pretreatment method has been suggested to improve the cyanidation process.
Key words: removing of arsenic by bacteria sulphur cyanidation of gold