Abstract
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.
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References
Yang YP, Yang LY (2007) Geological features and prospecting potential of the Ajialongwa-Yahuo Au-(Cu) Ore Zone, Litang, Sichuan. Acta Geol Sichuan 27(3):0–176
Zhu HP (2007) Geological characteristics and genesis of Ajialongwa gold deposit, Sichuan province. Gold 28(6):18–20
Xia TG, Sun CM, Li L, Wang YZ, Liu C, Yang YP (2006) Geological features and prospecting criteria of the Ajialongwa gold deposit, Sichuan. Geol Prospect 42(3):53–55
Huan WJ, Yuan WM, Li N (2011) Study on the mineral electron microprobe evidence of the formation conditions and fission track of gold deposits in Ganzi-Litang gold belt, Western Sichuan Province. Geoscience 25(2):261–270
Padilla GA, Cisternas LA, Cueto JY (2008) On the optimization of heap leaching. Miner Eng 21(9):673–678
Dai XW, Simons A, Breuer P (2012) A review of copper cyanide recovery technologies for the cyanidation of copper containing gold ores. Miner Eng 25(1):1–13
Valencia JA, Mendez DA, Cueto JY, Cisternas LA (2008) Saltpeter extraction and modelling of caliche mineral heap leaching. Hydrometallurgy 90(2–4):103–114
Hanson AT, Dwyer B, Samani ZA, York D (1993) Remediation of chromium-containing soils by heap leaching: column study. J Environ Eng 199(5):825–841
Karimi P, Abdollahi H, Amini A, Noaparast M, Shafaei SZ, Habashi F (2010) Cyanidation of gold ores containing copper, silver, lead, arsenic and antimony. Int J Miner Process 95(1–4):68–77
Bodlander G (1896) Die chemie des cyanidverfahrens. Angew Chem 9(19):583–587
Elsner L (1846) Uber das verhalten verschiedener metalle in einer wassrigen losung von zyankalium. J Prakt Chem 37(2):441–446
Acknowledgment
The authors would like to thank the support for this research of research fund for the development and construction plans of Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education (Grant No. 13zxgk07)
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Fu, K., Chen, S., Wang, Z., Xiao, J., Luo, D. (2015). Lime-Assisted Cyanide Leaching of Refractory Gold Ores from Ajialongwa Mine. In: Dong, F. (eds) Proceedings of the 11th International Congress for Applied Mineralogy (ICAM). Springer Geochemistry/Mineralogy. Springer, Cham. https://doi.org/10.1007/978-3-319-13948-7_12
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DOI: https://doi.org/10.1007/978-3-319-13948-7_12
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-13947-0
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