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Carbon-in-leach and carbon-in-pulp are continuous processes that use activated carbon in a cascade of large agitated tanks, which have been widely used to The process design of gold leaching and carbon-in-pulp circuits. carbon-in-pulp circuit CIP. The carbon-in-leach CIL process, illustrated in Figure 3 is a variation of the CIP ...
Keywords adsorption, carbon-in-leach, carbon-in-pulp CIP circuits, CIP process design, CIPCIL processes, Computer-Aided Process Engineering CAPE, elution, gold leaching, gold recovery and regeneration Accreditation SciELO SA
These methods are Carbon-in-Leach CIL and Carbon-in-Pulp CIP. CIL and CIP operations involve several adsorption tanks placed in a series. Pulp flows continuously from the first tank to the last, while carbon is pumped countercurrent from the last tank to the first. The main difference between CIL and CIP lies in the extent to which gold is ...
Corpus ID 32370569. The process design of gold leaching and carbon-in-pulp circuits inproceedingsStange1999ThePD, titleThe process design of gold leaching and carbon-in-pulp circuits, authorW. C. Stange, year1999
Figure 4Influence of grind size on leach recovery - The process design of gold leaching and carbon-in-pulp circuits
The carbon in pulp CIP and carbon in leach CIL processes became firmly established in the gold mining industry in the 1980s, initially in South Africa and Australia, from where they spread ...
These methods are Carbon-in-Leach CIL and Carbon-in-Pulp CIP. CIL and CIP operations have a number of adsorption tanks placed in series. Pulp flows continuously from the first tank to the last, while carbon is pumped counter current from the last to the first tank. The main difference between CIL and CIP lies in the extent to which gold is ...
adsorption onto activated carbon, these effects include competing metal-cyanide complexes, preg-robbing and the mineralogy of the ore. This thesis considers these areas from an experimental and modelling viewpoint. In this research it is shown that a variety of metal-cyanide species can be used to leach gold from certain refractory ores.
A major use of activated carbon in mining is in gold recovery , where granular activated carbon GAC is used for adsorption of the gold-cyanide complex in carbon-in-pulp CIP and carbon-in-leach CIL systems, or in carbon-in-column CIC systems after a heap leach operation carbon.
Carbon-in-Pulp CIP and Carbon-in-Leach CIL processes have surface areas of about 1000 m g i.e. one gram of activated carbon the amount of which will occupy the same space as the end of a persons thumb has the same surface area as two football fields.
3. Carbon-In-Leach CIL The carbon-in-leach process integrates leaching and carbon-in-pulp into a single unit process operation. Leach tanks are fitted with carbon retention screens and the CIP tanks are eliminated. Carbon is added in leach so that the gold is adsorbed onto carbon almost as soon as it is dissolved by the cyanide solution.
The dissolution of gold through cyanidation, either Carbon in Pulp CIP or Carbon in Leach CIL, is an oxidizing reaction. Generally added oxygen, in the form of dissolved oxygen in solution, improves the process as the rate of gold dissolution is directly proportional to the amount of
Each carbon leach tank has a interstage screen in it for carbon retention. Slurry can gravity flow between tanks or be pumped. Typically there are 4 to 6 tanks in series. From the first tank, the loaded carbon is pumped using a recessed impeller pump to not degrade the carbon, or another suitable type of pump, to a loaded carbon screen, where ...
carbon and gold in carbon in pulp CIP and carbon in leach CIL applications. However, this reactor design also has some drawbacks. The strong correlation between solids particle size and the required mixing power for solids suspension makes it difficult to achieve a
These carbon recovery techniques include Carbon-in-pulp The ore is crushed, finely ground and mixed with the cyanide leach solution to form a slurry in an agitation tank. The activated carbon is introduced into the slurry and then removed by screening once it is fully loaded or pregnant with gold. Carbon-in-leach
pulp in either a carbon-in-leach CIL, or a carbon-in-pulp CIP plant. In both these cases, the coarse granules of activated carbon are mechanically mixed with the pulp in an adsorption tank, and gold-loaded carbon granules are separated from gold-depleted pulps by screening.
In the gold industry, the use of activated carbon to separate gold from cyanide leaching solutions has become an industry standard for efficient gold recovery in Carbon-in-Leach CIL, Carbon-in-Pulp CIP and Carbon-in-Column CIC operations.
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