Assuming that a gold ore has been effectively ground to ensure maximum economic liberation of gold, the circuits that will have the most effect on the successful operation of a gold plant will be that of the leaching and carbon-in-pulp circuit (CIP).
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The process design of gold leaching and carbon-in-pulp ... A block-flow diagram of a typical CIP for a non-refractory ore is shown in Figure 2. Table I and Table II illustrate the capital and operating cost breakdowns for a typical African .
Carbon-in-pulp (CIP) is the sequential leach then absorption of gold from ore. During the CIP stage, pulp flows through several agitated tanks where sodium cyanide and oxygen have been added to dissolve gold into solution. In the absorption stage, this solution flows through several agitated tanks containing activated carbon.
The process design of gold leaching and carbon-in-pulp ... Before leaching the pH of the pulp is normally adjusted to a value of around to ensure minimum loss of cyanide as hydrogen cyanide. The leaching of gold can be conveniently represented by the Elsener equation:  Although air agitated leach tanks were commonly used in the industry ...
1990. Towards more effective simulation of CIP and CIL processes. 1. The modelling of adsorption and leaching. R. P. Woollacott, Stange, W. King. Engineering. 1990. To date developments in the simulation of carbon-in-pulp (CIP) adsorption circuits have focused primarily on the modelling of adsorption.
Gold Cyanide Leaching Process, Gold Cyanidation Process. All-slime cyanidation technology is a technology which put activated carbon into pulp and leaching with absorbing at the same time. It includes the stages such as leaching pulp preparation, leaching and adsorbing, removal carbon recycling, pulp agitation, and …
The process design of gold leaching and carbon-in-pulp ... The ore is first reduced in size typ to ensure that all non- refractory gold is readily accessible for cyanide leaching. There are several variations of comminution circuits used in the gold industry, such as: Multi-stage crushing and pebble and/or ball … Leave Us Now
The process design of gold leaching and carbon-in-pulp ... concentration of in the aqueous phase is typically between 0.001 and 0.02 ppm with a value of 0.01–0.005 ppm regarded as a practically achievable value for most well-designed and operated plants. This represents a of 90–99% depending on the tenor of the feed solution.
The process design of gold leaching and carbon-in-pulp ... African plant. These figures are not a standard but reflect the nature of the ore and the design basis for a particular situation. The ore is first reduced in size typically 80% passing 75µm to ensure that all non-refractory is readily accessible for cyanide leaching.
The process design of gold leaching and carbon-in-pulp circuits contaminants. These are removed by thermal regeneration of the eluted carbon, typically in a rotary kiln at temperatures of 650–750°C. Regeneration is carried out in a steam atmosphere to minimize carbon degradation due to oxidation. The eluted and regenerated carbon is screened ...
CIL stands for carbon-in-leach. This is a gold extraction process called cyanidation where carbon is added to the leach tanks (or reaction vessel) so that leaching and adsorption take place in the same tanks. CIL is slightly different from another gold extraction process called CIP or carbon-in-pulp process.