Cyanide Consumption of a Gold-Bearing Pyrite Concentrate, using Ozone as a Pre-Treatment

Authors

  • Carolina Rodriguez-Rodriguez UNIVERSIDAD DE GUANAJUATO
  • Gabriela Salas-Puente Universidad de Guanajuato
  • Juan Carlos Baltazar-Vera Universidad de Guanajuato
  • Joel Everardo Valtierra-Olivares Universidad Autónoma de Zacatecas
  • Omero Alonso-Gonzalez Universidad Autónoma de Zacatecas

DOI:

https://doi.org/10.36790/epistemus.v15i31.194

Keywords:

Gold-bearing pyrite, refractory ores, cyanidation, ozone

Abstract

Pyrite (FeS2), is the second most common host mineral for gold species. This association presents a great complexity, due to the gold can be finely disseminated or included at very fine size (0.1 to 1.0 µm), which requires extreme crushing conditions and strong oxidation in order to, liberate the gold, in a subsequent cyanidation step. In this work, cyanide consumption was evaluated, when a gold-bearing pyrite concentrate is submitted to a pretreatment with ozone prior to the conventional cyanidation.  Tests were carried out at two different cyanide concentrations (1000 and 3000 ppm of CN)-, for a gold pyrite concentrate (67.44% of FeS2), where a significant decrease in cyanide consumption of 54% and 69% was found, when the mineral is submitted to an ozone treatment before cyanidation. These findings suggest that the use of ozone increases silver recovery and generates significant environmental impact.  

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References

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Published

2022-04-01

How to Cite

Rodriguez-Rodriguez, C. de J., Salas-Puente, G., Baltazar-Vera, J. C., Valtierra-Olivares, J. E., & Alonso-Gonzalez, O. (2022). Cyanide Consumption of a Gold-Bearing Pyrite Concentrate, using Ozone as a Pre-Treatment. EPISTEMUS, 15(31), 38–43. https://doi.org/10.36790/epistemus.v15i31.194

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