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Gold CIP processing may be considered when gold can be economically leached and recovered through activated-carbon adsorption after leaching.
CIP is not a fixed solution for every gold ore. Ore mineralogy, gold occurrence, leachability, reagent consumption, preg-robbing behavior, grind size, slurry conditions, and environmental requirements should be reviewed before selecting the route.
LIPU helps organize the relevant process stages around available project information, providing a practical basis for further engineering and equipment selection.
A typical gold CIP plant may include the following connected stages:
Crushing and Screening
Run-of-mine ore is reduced to a suitable size for grinding. The crushing circuit may include primary crushing, secondary crushing, screening, and fine ore storage, depending on feed size and capacity.
Grinding and Classification
The crushed ore is ground to release gold-bearing minerals from gangue material. A grinding and classification circuit prepares slurry at the required particle size for downstream leaching.
Leaching
Ground slurry enters the leaching stage, where gold is dissolved under the selected operating conditions before carbon adsorption begins.
CIP Carbon Adsorption
Leached slurry then enters a separate sequence of adsorption tanks. Activated carbon contacts the slurry and adsorbs dissolved gold as the circuit operates.
Loaded Carbon Recovery
Loaded carbon is separated from the slurry and transferred to the selected downstream recovery arrangement.
Gold Recovery and Tailings Handling
The downstream section may include carbon treatment, gold recovery, tailings dewatering, solution management, and water return stages according to project requirements.
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.
After adsorption, loaded carbon is separated from the slurry using carbon recovery equipment and transferred to the selected downstream recovery arrangement. This prevents activated carbon from entering the tailings stream and keeps the carbon handling stage connected to the overall CIP circuit.
Depending on the project scope, the recovery section may include loaded-carbon transfer, acid washing, elution, electrowinning, and smelting arrangements. LIPU configures this section around the selected recovery method, capacity, site utilities, and downstream handling requirements.
Both CIP and CIL use activated carbon to recover dissolved gold from slurry. The key difference is the sequence of leaching and carbon adsorption.
| Process | Leaching Stage | Carbon Adsorption Stage |
|---|---|---|
| CIP | Completed before adsorption | Takes place in separate adsorption tanks |
| CIL | Takes place in the CIL tank sequence | Takes place at the same time as leaching |
CIP may be considered where a separate leaching stage and a dedicated adsorption circuit suit the ore and the overall processing objective. The final route should be selected according to ore behavior and project requirements.
Ore preparation
Consistent feed size and suitable grinding conditions help create a stable slurry for downstream leaching and adsorption.
Separate leaching stage
The slurry is leached before it enters the carbon adsorption circuit. This separate arrangement is the defining process difference between CIP and CIL.
Carbon adsorption and handling
Activated carbon is used in the adsorption circuit to recover dissolved gold from leached slurry. Carbon movement, screening, recovery, and transfer should be arranged to suit plant capacity and operating conditions.
Loaded carbon and downstream recovery
After separation, loaded carbon is transferred to the selected downstream recovery arrangement.
Tailings and water management
After carbon separation, carbon-free slurry is routed to the selected tailings-handling and water-return stages.
A practical CIP plant is configured around project-specific conditions, including:
The final process route should be confirmed through appropriate metallurgical evaluation and project-specific engineering.
A gold CIP plant is not simply a group of leaching tanks and carbon tanks. It is a connected system that begins with ore preparation and continues through grinding, leaching, carbon adsorption, carbon handling, downstream gold recovery, and tailings management.
LIPU helps organize these stages into a practical plant configuration based on available project information. For an initial review, please provide:
What is a gold CIP processing plant?
A gold CIP processing plant is a leaching and carbon-adsorption route in which gold is leached from slurry before the slurry enters separate activated-carbon adsorption tanks.
What is the difference between CIP and CIL?
In CIP, leaching is completed before carbon adsorption begins. In CIL, leaching and carbon adsorption occur together in the same sequence of agitated tanks.
Is CIP suitable for every gold ore?
No. CIP suitability depends on ore mineralogy, gold occurrence, leach response, reagent consumption, carbon behavior, processing capacity, and local project requirements.
Can gravity recovery be used before CIP?
In some projects, gravity recovery may be considered before leaching to recover suitable liberated coarse gold. Whether this arrangement is appropriate depends on ore characteristics and the selected recovery objective.
What information is needed for a CIP plant inquiry?
Useful information includes ore type, gold grade, assay or mineralogical data, feed size, target capacity, available test results, site conditions, and downstream product requirements.
We provide a variety of mining and processing equipment, including feeders, rock crushers, grinders, classifying and screening machines, washing machines, gravity separators, flotation machines, magnetic separators, electric separators, dewatering equipment and laboratory mineral processing equipment.
