producing substances which can reduce the efficiency of gold leaching. Minerals that cause excessive consumption of cyanide are called cyanocides. Examples include copper, nickel, iron and sulphide minerals. If they are present in the ore, extra cyanide must be added which can add considerably to the cost of leaching the gold.
The Heap Leach Process Briefly stated, gold heap leaching is a hydrometallurgical process designed to treat amenable low grade gold ores that contain roughly 0.5 gram per metric ton gold to 1.5 g/t gold . The ore
18/2/2021· These materials must possess the following characteristics: Gold and silver values are leachable by cyanidation, size of the gold particles is extremely small, the host rock is porous to cyanide solution, and remains permeable during the relatively long leach cycle, gold particles in ores of low porosity are liberated or exposed by fracturing and crushing, the ore is free ...
Low grade gold and silver ore and tailings low clay content. Ore with deep oxidation and no copper tin and carbonaceous material. Low sulfur content and high mud content Gold mine. Recovery Rate. 65 80%. 50 70%. 90% or more. 90% or more. Cost. lower. lower slightly higher than heap leaching. higher. higher than CIP. Advantages. The cost is
from the dissociation of the complex is used to leach gold from the ore. The stepwise dissociation of cyanide from copper cyanide complexes can also be used to leach gold from a variety of oxide and sulphide ores. The copper cyanide's fourth ligand readily dissociates at low cyanide concentrations for use in gold leaching.