South Africa's Illegal Gold MinesSubmitted by goldenequity on Mon, 08/25/2014 - 11:31
The gold underground is matrixed with quartz inside 'reefs' throughout the Johannesburg area. It is mined, crushed and extracted using sodium cyanide as a leach solution, then precipitated out of solution by various methods. It's a relatively simple process.
The 'process' shown in the film is very crude.. hand crushing, sluice concentrating then capture using mercury to extract (then smelting).
These are the deepest mines in the world.. some miles deep. Workers in active mines wear 'ice jackets' to harvest the ore because of the heat.