Experimental Study on the Cyanidation of a Low-Grade Gold with High Content of Arsenic in Myanmar

Abstract:

The content of gold ore in Wa region of Myanmar is 3.52 g/t ~5.87g/t, and it contains 9.32% arsenic, it belongs to awkward gold ore with gold embeds in pyrite as fine granular. so the drawbacks of low leaching rate and wasting of resources existed in the early cyanide production. A technology of adjusting pH in lime water and further leaching after regrinding was confirmed by contrasting the mixing effect in different reagent. The experiment results showed that a leaching rate of 81.63% has been obtained by adopting the conditions which pulp density is 40%, the pH of pulp adjusted in lime water is 10, the total NaCN dosage of three additions is 3 and the material is reground before third addition.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 1041-1044
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.1041
• Online since: August 2013
• Authors: Peng Yang, Gui Fang Zhang, Qing Rong Yang
• Keywords: Cyanidation Experiment, Further Leaching after Regrinding, Low-Grade Gold Ore with High Arsenic Content, Size Mixing in Lime

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