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Updated: May 28, 2025
The pulp is now washed with clean water, which leaches all the gold and silver out, and leaves the tailings ready for discharge, either in cars or sluiced away by water, if it is plentiful. "The chemical reaction of cyanide of potassium with gold is as follows, according to Elsner: 2Au + 4KCy + O + H2O = 2KAuCy2 + 2KHO. "That is, a double cyanide of gold and potassium is formed.
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