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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/6362

Title: Simulation study of the optimal distribution of cyanide in a gold leaching circuit
Other Titles: Minerals Engineering
Authors: Lima, Luiz Rogério Pinho de Andrade
Hodouin, D.
Keywords: Cyanidation;Gold ores;Leaching;Modelling;Process optimization;Process synthesis
Issue Date: 2006
Publisher: Minerals Engineering
Abstract: The mineral industry has been using cyanidation to recover gold from ores for more than a century; however, a systematic study of the best reactant addition strategy in a cascade of agitated leaching tanks is not available in the open literature. A phenomenological mathematical model of the gold cyanidation process, calibrated with a set of industrial data from an Australian plant, together with an economic performance index is used to analyze this problem. The simulated results show that the best compromise between the two antagonistic effects, cyanide consumption and gold recovery, which are both function of cyanide concentrations, leads to a reagent distribution that depends on the leaching and cyanide consumption kinetics, pulp feed characteristics, and economic factors such as the gold market value. For the specific studied plant, in the operating range of low cyanide consumption and fast gold dissolution, all the cyanide must be added in the first tank; however, in the operating conditions of high cyanide consumption, cyanide has to be distributed in the first, second and third tanks.
Description: RESTRITO
URI: http://www.repositorio.ufba.br/ri/handle/ri/6362
ISSN: 0892-6875
Appears in Collections:Artigos Publicados em Periódicos (PEI)

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