The primary hydrometallurgical method for recovering precious metals from crushed ore. The rock is exposed to a dilute sodium cyanide solution, which dissolves the gold or silver into a water-soluble coordination complex. The pregnant solution is then separated from the barren tailings, and the gold is recovered using activated carbon or zinc precipitation.
Heard on the job
We need to optimize the grind size before sending the feed to the cyanidation tanks to improve our recovery rate.