Carbon in pulp

carbon-in-pulpgold purification
Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process.wikipedia
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Activated carbon

activated charcoalactive carbonactive charcoal
Activated carbon acts like a sponge to aurocyanide and other complex ions in solution.
Activated carbon is used in methane and hydrogen storage, air purification, solvent recovery, decaffeination, gold purification, metal extraction, water purification, medicine, sewage treatment, air filters in gas masks and respirators, filters in compressed air, teeth whitening, production of hydrogen chloride in dark and many other applications.

Gold cyanidation

cyanide processcyanide plantcyaniding
Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process.

Gold

Aunative goldgold dust
Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process.

Cyanide

cyanocyanogenicCN
Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process. Hard carbon particles (much larger than the ore particle sizes) can be mixed with the ore and cyanide solution mixture.

Solution

solutesolutessolutions
Activated carbon acts like a sponge to aurocyanide and other complex ions in solution. Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process.

Silver

Agsilver orenative silver
As such it is used in most industrial applications where the presence of competing silver or copper does not prohibit its use.

Copper

CuCu 2+ cupric
As such it is used in most industrial applications where the presence of competing silver or copper does not prohibit its use.

Carbon

Ccarbonaceouscarbon atom
Hard carbon particles (much larger than the ore particle sizes) can be mixed with the ore and cyanide solution mixture.

Adsorption

adsorbedadsorbadsorbent
The gold cyanide complex is adsorbed onto the carbon until it comes to an equilibrium with the gold in solution.

Slurry

slurrieshydraulic transportcement slurry
Because the carbon particles are much larger than the ore particles, the coarse carbon can then be separated from the slurry by screening using a wire mesh.

Tailings

mine tailingstailings pondtailing
In the final tank, fresh or barren carbon is put in contact with low grade or tailings solution.

Gram

ggramsgr
Typically concentrations as high as 4000 to 8000 grams of gold per tonne of carbon (g/t Au) can be achieved on the final loaded carbon, as it comes in contact with freshly leached ore and pregnant leach solution (PLS).

Tonne

ttonnesmetric ton
Typically concentrations as high as 4000 to 8000 grams of gold per tonne of carbon (g/t Au) can be achieved on the final loaded carbon, as it comes in contact with freshly leached ore and pregnant leach solution (PLS).

Tank leaching

leachingVat leachingleached
Typically concentrations as high as 4000 to 8000 grams of gold per tonne of carbon (g/t Au) can be achieved on the final loaded carbon, as it comes in contact with freshly leached ore and pregnant leach solution (PLS).

Pregnant leach solution

pregnant solution
Typically concentrations as high as 4000 to 8000 grams of gold per tonne of carbon (g/t Au) can be achieved on the final loaded carbon, as it comes in contact with freshly leached ore and pregnant leach solution (PLS).

Elution

mobile phaseeluteeluted
The final loaded carbon then is removed and washed before undergoing "elution" or desorption of gold cyanide at high temperature and pH.

Temperature

temperaturesair temperaturewarm
The final loaded carbon then is removed and washed before undergoing "elution" or desorption of gold cyanide at high temperature and pH.

PH

pH levelneutralpH value
The final loaded carbon then is removed and washed before undergoing "elution" or desorption of gold cyanide at high temperature and pH.

Ethanol

alcoholbioethanolethyl alcohol
Ethanol can also be used to desorb gold from activated carbon, but safety concerns have slowed its acceptance in the gold extraction industry.

Desorption

desorbeddesorbdesorbs
The final loaded carbon then is removed and washed before undergoing "elution" or desorption of gold cyanide at high temperature and pH. Ethanol can also be used to desorb gold from activated carbon, but safety concerns have slowed its acceptance in the gold extraction industry.

Gold extraction

digextract goldextracting gold
Ethanol can also be used to desorb gold from activated carbon, but safety concerns have slowed its acceptance in the gold extraction industry.

Musselwhite mine

Musselwhite mine uses a gold cyanidation and CIP (carbon in pulp) extraction process.

Homeward Bound Battery and Dam

An open cut mine and carbon-in-pulp treatment plant operated from 1988 to 1990 near the Homeward Bound mining area and surface evidence from earlier workings was lost in the more recent operations.