Activated carbon adsorption is a method that utilizes the characteristics of micropores and mesopores as adsorbents, playing a central role in gold extraction. According to this method, the solution containing gold flowing through the activated carbon adsorption bed can adhere and precipitate on the surface of the activated carbon pores. Then, after a series of processes, it is finally refined into gold.
Selection and preparation of activated carbon
Choose high-quality activated carbon with stable adsorption performance, such as Chengze's specialized gold refining activated carbon, which is made of imported coconut shell material and has a thick and wear-resistant wall, resulting in a high gold extraction rate.
The prepared activated carbon can undergo permeability and apparent density tests. Of course, it is best to prepare activated carbon according to European standards for smelting. In addition, the adsorption performance of activated carbon can be improved by the combination of metal catalytic additives.
Step 1: Chemical leaching
Firstly, it is necessary to convert the ore or waste containing gold into a leaching solution containing gold ions through modern chemical leaching methods.
Step 2: Filtering
Impurities and solid particles can be purified and separated through a filter or other equipment, leaving only a solution of gold.
Step 3: Adsorption
In this step, activated carbon will be used to adsorb gold ions from the leachate. It is precisely because activated carbon has highly microporous and mesoporous properties that gold can form stable chemical anchor points on its surface.
Step 4: Detachment
Desorption is the step of separating gold from the surface of activated carbon. In this step, activated carbon will be washed to remove adsorbed impurities and carbon. Gold can be desorbed by heating, dissolving, or blowing dust. This will produce sediment containing gold.
Step 5: Roasting and Electrolysis
The final step is to extract the gold from the sediment. Roasting can convert sediment into solid material, which is convenient for subsequent processing. Electrolysis, on the other hand, uses the refined gold powder to filter impurities through the process of electrolytic polishing.
The above steps and processes can be manually completed or processed from the perspective of modern chemistry or process automation to improve production efficiency and control processes - this is an extremely important link.
