| Macarthur and Forest cyanide process [mǝ`kär·thǝr ǝn `fär·ǝst `sī·ǝ´nīd ´präs·ǝs] METALLURGY A process for recovering gold by leaching the pulped gold ore with a solution of 0.2-0.8% potassium cyanide and next with water; the gold is then obtained by precipitation on zinc or aluminum or by electrolysis. |