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Gold extraction by carbon slurry method and carbon leaching method

2023-04-27 Xinhai (170)

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Both the carbon slurry method and the carbon leaching method are gold extraction processes, but there are some differences between them.


The carbon slurry method is a cyanidation method of leaching first and then adsorption. The process includes leaching in one set of equipment first, and then adding activated carbon in another set of equipment for gold adsorption. The carbon leaching method is a process of leaching and adsorption at the same time. In fact, the first two or three tanks do not add activated carbon, which is called pre-cyanidation, while cyanide leaching is carried out in the latter tanks, and activated carbon is added for countercurrent adsorption of gold. Compared with the carbon slurry method, the carbon leaching method has less equipment and workshops, shortens the working time, and improves the leaching rate of gold and silver.


The carbon leaching method is a commonly used gold extraction method. It puts gold-containing materials into a closed lime kiln and heats them through calcination, so that the gold is wrapped by mineral colloids and replaced from the solution. Different from the carbon slurry method, the carbon leaching method is carried out at high temperature, and at the same time releases a large amount of gas, which will release gold into the solution and improve the efficiency of gold extraction.


Generally speaking, the carbon slurry method and the carbon leaching method are both gold extraction processes, but their operation processes and principles are different. The carbon slurry method is a cyanidation method of leaching first and then adsorption, and the process is relatively complicated; while the carbon leaching method is carried out at high temperature and releases a large amount of gas at the same time, which improves the efficiency of gold extraction.


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