(a) a method of extracting gold and silver from ores by treatment with a dilute solution of sodium or calcium cyanide (or, formerly, potassium…
单词 | θ209346 |
释义 | society > occupation and work > industry > working with specific materials > working with metal > [noun] > extraction from ore > extraction of silver or gold (3) cyanide process1890 (a) a method of extracting gold and silver from ores by treatment with a dilute solution of sodium or calcium cyanide (or, formerly, potassium… cyaniding1894 cyanidation1896 The process of cyaniding gold or silver ores; the extraction of these metals from their ores by means of the cyanide process. |
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