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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/6961

Title: Dynamic simulation of the carbon-inpulp and carbon-in- leach processes
Other Titles: Brazilian Journal of Chemical Engineering
Authors: Lima, Luiz Rogério Pinho de Andrade
Keywords: Activated carbon;Adsorption;Gold;Leaching;Modeling;Optimization
Issue Date: 2007
Publisher: Brazilian Journal of Chemical Engineering
Abstract: Carbon-in-leach and carbon-in-pulp are continuous processes that use activated carbon in a cascade of large agitated tanks, which have been widely used to recover or concentrate precious metals in gold extraction plants. In the carbon-in-pulp process adsorption occurs after the leaching cascade section of the plant, and in the carbon-in-leach process leaching and adsorption occur simultaneously. In both processes the activated carbon is moved from one tank to another in countercurrent with the ore pulp until the recovery of the loaded carbon in the first tank. This paper presents a dynamic model that describes, with minor changes, the carbon-in-leach, the carbon-in-pulp, and the gold leaching processes. The model is numerically solved and calibrated with experimental data from a plant and used to perform a study of the effect of the activated carbon transfer strategy on the performance of the adsorption section of the plant. Based on the calculated values of the gold loss in the liquid and of the gold recovered in the loaded activated carbon that leaves the circuit, the results indicate that strategies in which a significant amount of activated carbon is held in the first tank and the contact time between the carbon and the pulp is longer are the best carbon transfer strategies for these processes.
Description: p. 623 - 635
URI: http://www.repositorio.ufba.br/ri/handle/ri/6961
ISSN: 0104-6632
Appears in Collections:Artigos Publicados em Periódicos (PEI)

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