The leaching of finely milled materials

Details The leaching of finely milled materials The leaching of finely milled materials

C - Chemistry, Metallurgy

22

B

53/369

C22B 3/04 (2006.01)

Patent

CA 2017079

A process is provided in which fine milling of source material containing leachable values is carried out whilst the source material is in contact with the leach liquor and any necessary oxidants. The leach liquor and source material are preferably fed upwardly, as a slurry, from the bottom of the mill to the top. The mill has grinding media particles therein having a density of at least 1Kg/~ greater than that of the slurry passing through the mill and an impeller having radiating arms operating at an arm tip speed and power density selected to achieve the desired results. The process is especially useful for the milling and leaching of gold bearing materials such as pyrite, pyrrhotite and marcasite.

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