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the process gold is refined from ore

The dissolved gold is readily adsorbed onto the carbon, thus removing it from solution, and the granular carbon is separated from the now barren ore by running the slurry through a screen. Gold is then leached from the carbon particles by a strong solution ofsodium cyanideandsodium hydroxide,and it is recovered from solution by electrowinning directly onto steel wool or by the Merrill-Crowe process.

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