cyanide concentration in gold leaching


Optimizing and evaluating the operational factors affecting

i Cyanide leaching experiments. The cyanidation experiments were carried out in a tumble bottle at ambient temperature under different conditions including pH of 10–11.5 solids content of 30–45% sodium cyanide concentration of 500–900 ppm particle size of 37–100μm and leaching time of 12–30 h. For each test a 300 g

Cyanide Leaching Chemistry and Gold Cyanidation

The reactions that take place during the dissolution of gold in cyanide solutions under normal conditions have been fairly definitely established. Most agree that the overall cyanide equation for leaching and cyanidation of gold is as follows: 4 Au 8 NaCN O2 2 H20 = 4 NaAu CN 2 4 NaOH

Cyanide Leaching Of Gold - Mine Engineer.Com

Most cyanide leaching is carried out at a alkaline pH of between 10 and 11 depending upon lab testing of individual ores and the optimum leaching/chemical use rates. The cyanide solution strength is also important in leaching gold with the typical range of solution being in the 0.02% -0.05% NaCN.

The Metallurgy of Cyanide Gold Leaching – An Introduction

Liberation: Cyanide leaching will only be effective if the cyanide can come in contact with the gold particle. For this to happen the ore should either be sufficiently porous for cyanide to reach the gold or more usually the ore is crushed and ground to a size at which the surface of the gold is exposed – i.e. the gold is liberated.

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cyanide concentration in gold leaching