Gold loaded carbon Desorption Electrolysis machine China Refining Elution system analysis
Gold loaded carbon Desorption Electrolysis sysytem inlcuding two system Desorption system and Electrolysis system
1.Desorption system:
The function of the analytical system is to transfer the gold cyanide complex (Au (CN) ₂⁻) adsorbed on activated carbon back into the solution, producing a high concentration of precious liquid
Main machine:
Analysis column (desorption column)
Material: Usually stainless steel (such as 304 or 316L, resistant to cyanide and alkali corrosion), sometimes carbon steel lined with epoxy resin is used.
·Design pressure: typically 0.3-0.5 MPa (for atmospheric pressure analysis) or higher (for high-pressure analysis).
·Design temperature: Depending on the process, it needs to withstand high temperatures above 100 ° C.
·Height to diameter ratio: usually designed as 3:1 to 6:1 (height to diameter ratio) to ensure sufficient contact between the analytical solution and the carbon bed.
2.Electrolysis system:
The gold (in the form of gold cyanide complex) in the precious liquid produced by analysis is deposited on the cathode by electrochemical method to form gold soil
Main machine:
Electrolytic cell (electrolytic cell)
·Tank material: polypropylene (PP) or high-density polyethylene (HDPE), with good corrosion resistance and insulation properties.
·Cathode: Stainless steel mesh baskets or orifice plates are usually used, filled with steel wool (stainless steel wool) inside. Gold ultimately settles on steel wool.
·Steel wool model: Commonly used is 000 # or 00 # ultra-fine steel wool to provide a large specific surface area.
·Anode: A mesh or plate-shaped anode typically made of 316L stainless steel. Resistant to cyanide and alkali corrosion.
·Power supply: DC rectifier, requiring constant current or constant voltage control function.
Parameter of the Carbon Desorption Electrolysis machine
Operation points
1. Pre treatment:
Gold loaded carbon usually needs to be acid washed (with dilute HCl or HNO 3) before analysis to remove impurities such as calcium carbonate and prevent scaling and blockage in the analysis column.
2. Closed loop cycle:
Modern gold extraction plants typically treat analysis and electrolysis as a closed-loop system. After electrolysis, the lean solution is returned to the analytical column for continued use, which can enrich the gold concentration in the analytical solution, improve electrolysis efficiency, and reduce the consumption of cyanide.
3. Gold mud treatment:
Regularly remove steel wool from the electrolytic cell, undergo a series of treatments such as acid washing (impurity removal), burning (removal of steel wool and organic matter), melting, etc., and finally cast into gold ingots (Dore Bullion).
4. Carbon regeneration:
The analyzed lean carbon can be returned to the leaching circuit for recycling.
