Roasting of refractory gold and silver concentrate
DOI:
https://doi.org/10.3989/revmetalm.1102Keywords:
Roasting, Refractory minerals, CyanidationAbstract
In processing of precious metal ores with high pyrite content, refractory concentrates are obtained, which are difficult to process. A refractory gold and silver concentrate was leached with sodium cyanide. Results show low extraction percentages, being 34 % of gold and 40 % of silver. A roasting method to oxidize the concentrate was used, making it more susceptible to cyanidation, hence a more efficient way to extract precious metals. The variables include roasting temperature and roasting and cyanidation time. In addition, the hot calcine was added to the leaching solution at room temperature to analyze the effect on particle size and recovery. The best results, although not entirely satisfactory (50 % of gold and 61 % of silver) were obtained by roasting the concentrate for 4 h at 600 °C, followed by cyanidation for 20 h. The lime consumption to raise the pH to about 11.3 was increased markedly to 25 kg/m3.
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[1] E. Salinas, I. Rivera, F. R. Carrillo, F. Patiño, J. Hernández y L. E. Hernández. Rev. Soc. Quím. Méx. 48 (2004) 315-320.
[2] J. R. Parga y F. R. Carrillo. Rev. Metal. Madrid, 32 (1996) 254-261.
[3] V. Arias-Arce, R. Coronado-Falcón, L. Puente Santibáñez y D. Lovera-Dávila. Revista del Instituto de Investigación FIGMMG, 8 (2005) 5-16.
[4] O. Celep, I. Alp, H. Deveci y M. Vicil. Met. China 19 (2009) 707-713.
[5] J. H. Coronado, Tesis de Maestría, Departamento de Ingeniería Química y Metalurgia, Universidad de Sonora, 1997.
[6] J. R. Goode. TMS, EPD Congress, 1993, pp. 291-317.
[7] J. C. Yannopoulus. The extractive metallurgy of gold, Van Nostrand Reinhold, 1991 pp. 79-98. http://dx.doi.org/10.1007/978-1-4684-8425-0_5
[8] D. C. Harris. Mineral. Deposita 25 (1990) 3-7. http://dx.doi.org/10.1007/BF00205243
[9] R. B. Coleman. Proceedings of Gold. Symposum, 1990, pp. 381-388.
[10] A. Vladimir, R. C. Falcon, L. Puente y D. Lovera. Rev. Inst. Inv. FIGMMG, 16 (2005) 5-7.
[11] P. R. Taylor, Z. B. Yin y R. W. Barlett. Gold 90, SME, 1990, pp. 411-419.
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