IGoli MINTEK | MINTEK
It consists of leaching the gold concentrate with dilute hydrochloric acid and bleach. After the solids are filtered, the gold is precipitated out with sodium metabisulphate. The iGoli method has been applied by some South African artisanal miners, and has now been incorporated in a small plant suitable for groups of artisanal miners or very small commercial operators. Plants have been set up