The gold beneficiation process is a series of steps aimed at removing impurities and improving the quality of gold ore. The process involves crushing and grinding the ore to a fine powder, followed by various separation and purification techniques to isolate and concentrate the gold.
Gold beneficiation process begins with crushing and grinding the ore to a fine powder. This is usually done using a combination of crushers, mills, and grinders. The resulting powder is then treated with chemical reagents to selectively separate the gold from other minerals in the ore.
Gravity separation is carried out which involves the use of gravity to separate gold particles from other heavier minerals in the ore. Gravity separation techniques may include methods such as panning, sluicing, jigging, or shaking tables. These techniques rely on the difference in density between the gold particles and the other minerals in the ore.
Jigging and shaking tables involve the use of a device that agitates the mixture of ore and water, causing the denser gold particles to settle to the bottom while the lighter minerals are carried away by the water.
Gold concentrate can be further refined through processes such as cyanidation or flotation.
Cyanidation involves treating the gold concentrate or gold ore with a solution of sodium cyanide, which dissolves the gold and allows it to be separated from other minerals in the ore. In some cases, the cyanide solution is sprayed onto the gold concentrate, which is then mixed and agitated to allow the cyanide to dissolve the gold. The resulting solution, called a pregnant solution, contains the dissolved gold and is then processed further to isolate the gold and remove any remaining impurities.
Control of the cyanide process and environmental risks are expertise of RMG.
Flotation is another common method used to refine the gold concentrate. This process involves adding chemical reagents to the concentrate, which selectively attach to the gold particles and allow them to be separated from other minerals in the ore. The gold particles are then floated to the top of the solution, where they can be skimmed off and further processed to isolate the gold.