Uses of the potassium permanganate to eliminate copper cyanide from waste water resulting from a lixiviation plant in a gold mine (II): Pilot plant experiences


  • J. P. Sancho E.T.S.I.M.O.
  • B. Fernández E.T.S.I.M.O.
  • J. Ayala E.T.S.I.M.O.
  • M. P. García E.T.S.I.M.O.
  • A. Lavandeira Río Narcea Gold Mines, S.A.



Cyanide, Hydrometallurgy, Gold, Potassium permanganate, Copper cyanide


The search for a detoxification treatment of the wastewater generated during industrial processes, has been a constant for all companies in general and for gold mining in particular, whose wastewater generally contains high concentrations of cyanide compounds with high toxicity. In the previous research work, developed in the laboratory, the efficacy of potassium permanganate as an oxidizing agent for cyanidic wastewater, from a gold hydrometallurgical plant, has been demonstrated, achieving the destruction of copper cyanide complexes present in solution and the subsequent metal removal by precipitation as hydroxide. This paper presents the conclusions obtained after the implementation of the process developed in the laboratory, at pilot-plant scale.


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How to Cite

Sancho, J. P., Fernández, B., Ayala, J., García, M. P., & Lavandeira, A. (2011). Uses of the potassium permanganate to eliminate copper cyanide from waste water resulting from a lixiviation plant in a gold mine (II): Pilot plant experiences. Revista De Metalurgia, 47(3), 224–233.