Table of Contents
What is gold floatation?
The flotation method is a widely used technique for the recovery of gold from gold-containing copper ores, base metal ores, copper-nickel ores, platinum group ores and many other ores where other processes are not applicable. Flotation process maximizes the enrichment of gold into sulfide minerals.
What is gold concentrate used for?
A concentrate containing more than 20g/t of gold, a gold concentrate becomes gold after going through the refining and smelting processes. The resulting gold is mainly used for making jewelry and electronic devices, as well as investment goods.
How do you extract gold from cyanide?
Cyanide can be used to extract gold, either in a controlled mill environment, or more crudely on rock piles in the open. Cyanide “vat leaching” mixes finely crushed ore with a cyanide salt in water. The cyanide binds to the gold ions, and makes them soluble in water, thereby allowing separation from the rock.
How is gold concentrated?
Gold concentrates tend to be mostly iron, so they are also known as “black sands.” Gold concentrates are also made by grinding down ore, quartz, or other productive rock types into sand. This procedure is much faster and easier than panning, but the tradeoff is a final product that has less gold “concentrated” within.
Is thiosulfate more expensive than cyanide?
Thiosulfate leaching appears to be an innovative and eco-friendly alternative for the upcoming replacement of cyanidation; besides, thiosulfate is cheaper than cyanide.
How gold is recovered from its ore by cyanidation process?
Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) 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.
Can cyanide dissolve gold?
A sodium cyanide solution is commonly used to leach gold from ore. Heap leaching: In the open, cyanide solution is sprayed over huge heaps of crushed ore spread atop giant collection pads. The cyanide dissolves the gold from the ore into the solution as it trickles through the heap.