Gold cyanidation is a hydrometallurgical technique for extracting gold from low grade ore by converting the gold to a water soluble coordination complex. It is the most commonly used leaching process for gold extraction.
Gold mining can be extremely dangerous and one of the most harmful practices is the use of cyanide to extract the precious metal from the rock. Fortunately, there are a range of innovators trying to eliminate this notorious poison from the mining process. Since the mid 1800s, cyanide has been considered a cheap and effective way to separate ...
In recent years the use of cyanide in gold mining has become the dominant means by which gold is extracted from a body of ore. The mercury amalgamation process had previously been used but recovered only about 60 per cent of an ore bodys gold. In contrast, leaching finely ground ore with cyanide can recover up to 97 per cent of the ore body ...
of cyanide containing effluents from a gold mining operation . 3 Legal framework for mines using cyanide Many jurisdictions, including Canada and Australia, recommend that mines that use cyanide do so in a manner consistent with the International Cyanide Management Code, which involves minimizing the
Cyanide extraction of gold through milling of high grade ores and heap leaching of low grade ores requires cycling of millions of liters of alkaline water containing high concentrations of potentially toxic sodium cyanide , free cyanide, and metal cyanide complexes.