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Gold CIP Processing

The gold CIP (Carbon-in-Pulp) processing is widely used to extract gold from ore. It mainly involves using activated carbon to adsorb gold from a cyanide solution, then eluting and regenerating the carbon for reuse.

It is mainly suitable for beneficiating gold-containing oxidized ore with high slime content and containing carbon ore. JXSC equipment has fast absorption, high recovery rate and low consumption cost.

Gold CIP Process

Gold CIP (Carbon-in-Pulp) process uses activated carbon for adsorption based on oxidation leaching, which can increase the gold leaching rate. The main flow including crushing, grinding, leaching pretreatment, leaching, and activated carbon adsorption processing, gold-loaded carbon desorption and electrolytic stage, and tailing water recycle system.

Crushing, grinding: The ore is first crushed and ground to extremely fine particle size to match the size of the subsequent gold extraction process.
Leaching: Usually cyanide is added to the slurry as a leaching agent to help dissolve the gold in the ore.
Adsorption: It involves the introduction of activated carbon into the slurry, capable of selectively adsorbing gold from the slurry.
Carbon separation: A slurry containing gold-loaded carbon particles is passed through screens or filters to separate the carbon from the slurry.
Elution: It involves using chemical cleaning agents to strip the adsorbed gold from the carbon particles. It is primarily done by washing with a hot caustic/cyanide solution.
Electrolysis: An electric current causes gold to be electrochemically deposited on the cathode, forming solid metallic gold.
Smelting: The gold deposited on the cathode is usually melted and refined by smelting to cast it into bullion or other forms.
Regeneration: Spent carbon is heated to high temperatures, usually in a kiln or furnace, to remove impurities and restore its adsorption capacity.
Tailings treatment: Tailings contain various chemical substances or minerals, usually stored in tailings ponds or tailings reprocessing for further management and to reduce environmental impact.

CIP Gold Processing plant

12TPH Gold Cip Process plant flow

This is a complete set of gold carbon in pulp process details, which mainly includes the following steps to maximize the recovery of high-grade gold concentrate. The specific process is as follows:

1. Feeding & crushing system:

The excavator sends the raw ore into the hopper with a trough feeder. It can evenly send the material into the jaw crusher to crush the 210mm material to below 60mm. Then, the output of the jaw crusher is transported to the next fine jaw crusher by the belt conveyor, which crushes to less than 20mm. The output material is transported to the vibrating screen by the belt conveyor, and +20mm material is returned to the fine jaw crusher for further crushing. Finally, less than 20mm material into the hopper with an electromagnetic vibrating feeder and evenly fed into the ball mill.

2. Grinding system:

Ball mills grind fine ore rocks into a fine powder to release the gold in the rocks. Then, the output material enters the spiral classifier for classification. The large-grained minerals are returned to the ball mill for re-grinding to ensure that 80% of the final output is less than 200 mesh (0.074mm).

3. Leaching pretreatment :

After grinding and classification, the fine powder enters the slurry tank and into the thickener by sand pump. Before the pulp enters the thickener, there is a safety screen to pre-screen to prevent coarse particles, and the pulp under the screen directly enters the inside of the thickener. At the same time, add flocculant to accelerate the sedimentation. The overflow water of the thickener enters the sedimentation tank, and the water after sedimentation can be recycled.

4. Leaching

The thickener’s underflow will enter the mixing barrel with the height difference. Then, the stirred pulp is driven into the double impeller leaching tank with a sand pump, and sodium cyanide is added.

5. Activated carbon adsorption treatment:

After the gold is leached and dissolved in the solution, the slurry flows into the double-impeller stirring adsorption tank at the back. Then, activated carbon is added. It adsorbs the gold in the pulp to become gold-loaded carbon, which is extracted with a carbon extractor.

6. Desorption and electrolysis, recycling of gold-loaded carbon:

A vibrating screen removes the gold-loaded carbon, and the gold-loaded carbon enters the normal temperature and pressure desorption electrolysis system, after electrolysis, obtains gold mud. The gold mud is then dried in an oven. Finally, use the gold furnace to smelt the gold bars. After desorption, the gold-loaded carbon is generally reused in a drying oven.

7. Tailings water recovery system:

The tailings of the adsorption stirring tank first enter the vibrating screen to screen the carbon. The material under the screen enters the lower tank/pond and is pumped to the large conical pool or tank by the mud pump. Then, the slurry into the filter press by pump for pressure filtration and recovery of tailings water.

This gold cip plant is using high-temperature, high-pressure, cyanide-free, and automatically controlled for desorption. We support customized full set of gold process and mining equipment according to the actual situation of the customer’s mine.