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A mathematical model of the leaching of gold in cyanide solutions: Reply to G.T. Lapidus-Lavine We presented results for the leaching of gold from Witwatersrand ores. The experimental technique that we used was unique, in that we automatically maintained the concentration of cyanide throughout the course of the reaction. The leaching extraction was obtained directly from the analysis for gold in solution and the head grade. Ž . The extraction curves that we obtained are characterized by: i three regions to the overall leaching curve: a period of rapid leaching, followed by a period of slow leaching Ž . with a region of change between these two, ii the point at which the leaching curve moves from the lower region to the upper region occurs at about the same time in the Ž . leaching experiment, but at different values of the conversion, iii this point is Ž . dependent on the concentration of cyanide and, lastly, iv the final conversion for different experiments does not seem to have the same value, but seems to be dependent Ž . on the cyanide concentration and oxygen, from MacLauglin and Agar's results . Dr. Lapidus-Lavine has made a number of comments about this work, many of which

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Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-386X)

Published

1999

Language

EN

Field

Engineering (Physical Sciences)