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Effect of Particle Size and Grinding Time on Gold Dissolution in Cyanide Solution
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Effect of Particle Size and Grinding Time on Gold Dissolution in Cyanide Solution
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Journal Article
Effect of Particle Size and Grinding Time on Gold Dissolution in Cyanide Solution
2016
Overview
The recovery of gold by ore leaching is influenced by the size of the particles and the chemical environment. The effect of particle size on the dissolution of gold is usually studied using mono-size particles as the gold in solution comes from the ore of a unique leached particle size. This paper proposes a method to estimate the gold dissolution as a function of particle size using a bulk ore sample, i.e., with the dissolved gold coming from the various sizes of particles carried by the ore. The results are consistent with the fact that gold dissolution increases with the decreasing particle size but results also indicate that gold dissolution of the ore within a size interval is not significantly affected by the grinding time used for the ore size reduction. Results also show a good dissolution of the gold contained in the fine-size fractions without oxidation and lead nitrate pre-treatment for an ore that is known to require such pre-treatment.
