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Lime-Assisted Cyanide Leaching of Refractory Gold Ores from Ajialongwa Mine

Fu, Kaibin ; Chen, Shu ; Wang, Zhen ; Xiao, Junhui ; Luo, Deqiang

Proceedings of the 11th International Congress for Applied Mineralogy (ICAM), p.107-113

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Título:
Lime-Assisted Cyanide Leaching of Refractory Gold Ores from Ajialongwa Mine
Autor: Fu, Kaibin ; Chen, Shu ; Wang, Zhen ; Xiao, Junhui ; Luo, Deqiang
Assuntos: Column leaching ; Gold ores ; Heap leaching ; Lime
É parte de: Proceedings of the 11th International Congress for Applied Mineralogy (ICAM), p.107-113
Descrição: Heap leaching is a promising, less expensive, alternative technology for processing low-grade gold ores compared with traditional, energy-intensive processes (e.g., autoclave/tank leaching). The effects of lime on the heap leaching of gold ores from Ajialongwa gold mine in China were investigated. Leach tests included column leach tests, the pilot plant tests, and the commercial plant. The leach experiments were performed using cyanide leaching solutions at pH = 10–11. The results show that the presence of lime greatly increased gold leaching rates. Column leaching experiments show that there was 35.2 % of gold leached without the addition of lime. When 4 % lime was added to gold ores, Au extraction reached 50.56 %. Lime-assisted cyanide of refractory gold was also proved by the pilot plant tests and the commercial plant.
Títulos relacionados: Springer Geochemistry/Mineralogy
Editor: Cham: Springer International Publishing
Idioma: Inglês

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