Cil Gold Processing Plant

The production process of the CIL carbon leaching method for gold extraction in the gold mine production line mainly includes stages such as impurity removal, pre-leaching concentration, leaching and adsorption, elution & electrolysis, wet smelting, activated carbon regeneration, tailings filtration, and sewage treatment.

1. Pulp impurity removal: Before adsorption, it should remove impurities in cyanide pulp like sawdust to prevent sawdust from adsorbing gold in the pulp and mixing into the rich carbon. At the same time, it should prevent sawdust from blocking the charcoal screen.

2. Pre-leaching concentration: The slurry will be dehydrated by a thickener before leaching to achieve the appropriate leaching concentration. The concentration not only affects the leaching time but also affects the suspended state of activated carbon.

3. Leaching and adsorption: The impurity-removed and concentrated pulp will be pumped into a high-efficiency leaching tank in a ladder-like distribution, generally arranged in series with 5-8 tanks. Cyanide is added to the first two tanks, and activated carbon in the last five tanks. The slurry and activated carbon are countercurrent adsorbed. Activated carbon becomes gold-loaded carbon due to the adsorption of gold in the slurry. After activated adsorption, the gold-loaded carbon slurry will go to the carbon extraction screen, and the carbon extraction screen separates the activated carbon and the slurry.

4. Gold-loaded carbon desorption and electrolytic: The desorption of gold-loaded carbon and the electrolytic deposition of liquid gold are completed in a closed system. Under high temperatures and pressure, gold-loaded carbon will quickly absorb and electrodeposit into gold mud and poor carbon. The processing equipment includes desorption columns, pickling tanks, heaters, filters, desorption liquid tanks, electrolytic tanks, etc.