SX Kinetics, Inc. - Specialists in Solvent Extraction: Electrowinning Pilot Plants

HOME SITE MAP PRODUCTS SX PLANTS EW PLANTS LEACHING HYDROMET COALESCER SERVICES PROJECTS TECHNOLOGY DOWNLOAD CONTACT	SX Kinetics has the expertise to design and manufacture gold electrowinning plants for the recovery of gold from sodium cyanide solutions.
		Schematic diagram of a process to recover gold from cyanide solutions by carbon adsorption and electrowinning onto steel wool cathodes.
	Description of 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. For more details: EW Pilot Plant 12
	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.
	0 to 800 A and 0 to 4 V rectifier	EW cell with 15 cathode boxes and 16 anodes
	For more details: EW Pilot Plant 11
	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.
	For more details: EW Pilot Plant 13

	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.

	Gold Electrowinning