SciELO - Scientific Electronic Library Online

 
vol.112 issue4Precipitation of rhodium from a copper sulphate leach solution in the selenium/tellurium removal section of a base metal refineryEconomic modelling of a ferrochrome furnace author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717

Abstract

RADEMAN, L  and  GROOT, D.R. Cyanidation of reef and surface gold ores. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.4, pp. 295-300. ISSN 2411-9717.

The kinetic leaching behaviour of a low-grade surface gold ore and a high-grade reef ore were evaluated to determine the achievable gold recovery from these ores and particularly mixtures of these ores. The reef ore material has a head grade of 13.40 g/t with a relative standard deviation of 3%, and the unprocessed surface ore material a head grade of 0.43 g/t with a relative standard deviation of 15.6%. It is concluded that the kinetic leaching behaviour of these free milling gold ores during cyanidation, is not influenced by mixing of reef and surface ore material. No statistically significant relationship exists between the achievable recovery by direct cyanidation and the head grade of the material fed. No ideal ratio of surface ore to reef ore could be established. It is recommended that these materials should be processed simultaneously to minimize the costs, security risks, and losses incurred in transportation.

Keywords : leaching kinetics; gold; types of gold ores; cyanidation; Witwatersrand gold ores.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License