摘要:
Silver and/or gold (12) are recovered from ores or concentrates (1) by forming a mixture of the ore or concentrate (1) with electrolyte containing chloride ions (2) and maintaining the mixture at a temperature up to the boiling point of the electrolyte (2) whereby the silver and/or gold (12) is taken into solution (4). The gold and/or silver (12) is precipitated from the solution (4) by contacting the same with a metal having a potential higher than gold or silver in the electrochemical series. If gold is required the pH of the solution is adjusted to greater than 4.