Gold Refining

Our gold activated carbon is made of high quality coconut shell, which has thicker carbon wall and complete and uniform particles, which makes the activated carbon product has higher abrasion resistance and washing resistance. It has strong adsorption of precious metals, is easy to resolve, and can be regenerated many times. The appearance of the product is indeterminate black particles, uniform particle size, pore development, large specific surface area, strong adsorption, high mechanical strength, low bedding resistance, good chemical stability, easy to regenerate and wear-resistant.

Gold carbon provided by Qizhong Chemicals is mainly used in metallurgical industry for gold extraction by heap leaching method or carbon slurry method, which is suitable for gold mining production in modern gold mines. Its high adsorption capacity and fast adsorption characteristics are its distinctive features, while its high strength and abrasion resistance are its advantages. Used in gold and precious metal mining, it not only has high adsorption capacity and fast recovery, but also significantly improves the gold recovery rate and efficiency of production equipment, and can be reused three to four times.

1. In the cyanide solution, gold adsorbs on the inner surface of the activated carbon as ionic couples or neutral molecules, or the bonded ions combine with metal ions to precipitate in the voids of the activated carbon, where the metal ions come from the solution or from the activated carbon ash (which may have calcium, potassium, sodium, etc.).
2. Au(CN)₂-chemically decomposes to form insoluble AuCN, which remains in the carbon voids.
3. Some of the AuCN is reduced to certain compounds containing gold atoms with oxidation states of valence 0 and 1.
4. Au(CN)₂- or AuCN is reduced to Au metal.