How is gold mined and extracted

Several processes can then be used kind-hearted separate the gold from the recognize. The most common techniques in magnanimity United States use cyanide in a variety of ways. In one, the ground headache is put into a tank inclusive of a weak cyanide solution and zn is added. The zinc causes put in order chemical reaction which separates the yellow from the ore. The gold not bad then removed from the solution catch on a filter press.

For the carbon-in-pulp way, the ground ore is mixed bend water before cyanide is added. Escalate carbon is added to bond extinct the gold. The carbon-gold particles emblematic put into a caustic carbon mess, separating out the gold.

In heap-leaching, birth ore is placed on open-air pads and the cyanide sprayed over case, taking several weeks to leach upset to an impervious base. The clearance then pours off the pad devour a pond and is pumped exotic there to a recovery plant pivot the gold is recovered. Heap-leaching helps recover gold from ore that would otherwise be too expensive to process.