GOLD ELECTROWINNING

 

 

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SX Kinetics has the expertise to design and manufacture gold electrowinning plants for the recovery of gold from sodium cyanide solutions.

 

Recovery of Gold by Cyanide Leaching, Carbon Adsorption, and Electrowinning:

 

 

Gold electrowinning plant with carbon adsorption.

Description Process:
 

Lean electrolyte containing 10 to 20 g/L sodium cyanide at pH >10.5 (adjusted with sodium hydroxide) is heated to 90°C and pumped up flow at 2 bed volumes perhour through a stationary bed of activated carbon loaded with gold.

 

The gold that was adsorbed on the carbon as a sodium-gold cyanide complex (NaAu(CN)2) will be desorbed (eluted) from the carbon by a reversal of the adsorption mechanism. The solution exiting the top of the column (know as rich electrolyte) will flow by gravity into the electrowinning cell and the gold will be recovered by plating onto steel wool cathodes.

 

The lean electrolyte will flow from the electrowinning cell by gravity into an electrolyte tank where the concentration of sodium cyanide and sodium hydroxide can be adjusted prior to pumping it through the circulation heater (for reheating to up to 90°C) and back to the column for reuse.

   
 

Diagram showing elution of gold from activated carbon followed by gold electrowinning.

Schematic diagram of a process to recover gold from cyanide solutions by carbon adsorption and electrowinning onto steel wool cathodes.

 

For more details: EW Pilot Plant 12

     
 

Gold electrowinning cell with 15 cathodes and 16 anodes.

The following gold electrowinning plant was provided to a gold mining company in Indonesia. It featured 15 cathode boxes contain steel wool and 16 stainless steel anodes. This gold electrowinning plant is able to produce up to 140 kg of gold per day.

 

EW cell with 15 cathode boxes and 16 anodes

For more details: EW Pilot Plant 11

 
     
 

Gold electrowinning pilot plant.

For more details: EW Pilot Plant 13

The following gold electrowinning pilot plant was provided to a gold mining company for a project in Mexico. It featured 2 cathode boxes contain steel wool and 3 stainless steel anodes.

 

This gold electrowinning pilot plant is able to produce up to 20 kg of gold per month.

This electrowinning pilot plant was coupled to a scale scale heap leaching operation and recovered gold directly from the leach solution.

     
  This electrowinning plant was designed and manufactured by SX Kinetics for a gold agitation leaching / electrowinning project in Saudi Arabia. It has the capactiy to produce up to 1 kg of gold per week.

 

 

The gold that is deposited onto steel wool cathodes by our electrowinning plants is further refined by smelting with borax flux. The gold is melting in crucibles and the molten gold is poured and cast into ingots. SX Kinetics can provide all the melting and casting equipment with our electrowinning plants.

 

  SX Kinetics’ designed and manufactured this modular gold electrowinning production plant for a mine in Cuba. The plant has the capactity to produce 100 kg of gold per week. The modular design allowed it to fit inside a standard shipping container. The EW cell and electrolyte tanks are manufactured from fibreglass (FRP).

 

  This gold electrowinning plant has re-usable stainless steel mesh cathodes. The gold is havested from the cathodes by pressure washing the cathodes and recovering the gold particles from the wash water by filtration. The plant included the electrolyte tanks, pumps, circulation heater and heat exchanger.

 

  This compact electrowinning plant can produce up to 2.5 kg of gold per week. It features five anodes and four re-usable stainless steel mesh cathodes. The EW cell and electrolyte tanks are manufactured from polypropylene.
  This compact electrowinning plant can produce up to 2.5 kg of gold per week. It features five anodes and four re-usable stainless steel mesh cathodes. The EW cell is manufactured from fibreglass. This gold EW cell was shipped to Nicarauga.

 

  This compact electrowinning plant can produce up to 2.5 kg of gold per week. It features five anodes and four re-usable stainless steel mesh cathodes. The EW cell is manufactured from fibreglass. This gold EW cell was shipped to  Honduras.

 

  SX Kinetics’ designed and manufactured this modular gold electrowinning cell for a mine in Ghana. The cell has the capacity to produce 50 kg of gold per week. The EW cell and electrolyte tanks are manufactured from polypropylene.

 

     

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This page was last updated on 04/20/17

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