Скачать или смотреть Necessary Gold Cyanidation Equipment--Desorption Electrolysis System|Xinhai

The desorption electrolysis system represents a critical component in the hydrometallurgical extraction of gold, specifically designed to recover gold from loaded activated carbon through an integrated process of desorption and electrowinning. This system operates with an adsorption capacity of not less than 3.5 kilograms per tonne, demonstrating high efficiency in gold recovery operations.

The fundamental principle of gold electrowinning involves the introduction of anions that possess higher adsorption affinity to activated carbon than the gold-cyanide complex Au(CN)₂⁻. When these competing anions are introduced into the electrolysis system, they displace the gold-cyanide complexes from the carbon surface. This displacement reaction initiates the desorption process, whereby gold is transferred from the solid carbon phase into the aqueous solution.

Following successful desorption, the gold-bearing pregnant solution undergoes electrolysis. The electrolysis equipment facilitates the ionization process, during which gold ions migrate toward the cathode under the influence of an applied electric field. This migration results in the deposition of solid gold onto the cathode surface. The electrochemical reactions are carefully controlled to optimize gold recovery efficiency while minimizing energy consumption.

The operational sequence begins with the preparation of the electrolyte solution containing the specific anions selected for their superior adsorption characteristics. The loaded carbon is immersed in this solution within the desorption column, where temperature, pressure, and chemical conditions are maintained to maximize desorption efficiency. The resulting pregnant solution, now rich in gold, is continuously circulated through the electrolytic cells.

Within the electrowinning cells, the gold deposition process occurs under controlled current density and voltage parameters. The cathode materials are specifically chosen to facilitate easy removal of the deposited gold. The entire process operates as a closed system, allowing for efficient reagent utilization and minimal environmental impact.

System performance is monitored through continuous analysis of key parameters including solution chemistry, temperature profiles, and electrical characteristics. This monitoring ensures optimal operation and enables adjustments to maintain peak efficiency throughout the processing cycle. The integration of desorption and electrolysis in a single system provides significant advantages in terms of operational efficiency, space utilization, and process control compared to separate systems.

The successful application of this technology depends on careful optimization of multiple factors including anion selection, electrolyte composition, temperature control, and electrical parameters. Through precise control of these variables, the desorption electrolysis system achieves high gold recovery rates while maintaining cost-effectiveness and operational reliability. This makes it particularly valuable for modern gold processing operations where efficiency and environmental considerations are paramount.

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