cyanide process

noun
a process for extracting gold or silver from ore by dissolving the ore in an alkaline solution of sodium cyanide or potassium cyanide and precipitating the gold or silver from the solution.

Origin:
1885–90

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cyanide process
 
n
Also called: cyaniding a process for recovering gold and silver from ores by treatment with a weak solution of sodium cyanide

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Near the parking area are the remains of tanks used for the cyanide process and fine-grained tailings.
However, the cyanide process was not successful owing to too coarse of material being introduced to the cyanide.
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