Sludge content and pulp concentration will directly affect the dissolution rate of gold . The concentration of the slime and ore in the slurry is large, which will affect the contact between the gold particles and the solution and the diffusion rate of the effective components in the solution, and the dissolution rate of gold is lowered. Under normal circumstances, the concentration of granular ore in cyanide pulp should be no more than 30% to 33%. When the slurry contains more slime, the concentration of solid materials in the cyanide slurry should be less than 22% to 25%.
The hazard of the slime is mainly to increase the viscosity of the slurry. Whether it is the primary slime brought by the ore, or the secondary slime produced by the grinding, they all enter the slurry with highly dispersed fine particle size, and the gel which is extremely difficult to precipitate is suspended for a long time, and is reduced. The dissolution rate of gold, and the washing and filtration of the slurry is difficult, so that the dissolved gold is lost in the tailings slurry.
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