Advantages of extracting gold from coconut shell activated carbon

1.Coconut Shell Activated Carbon

Coconut shell activated carbon plays a vital role in gold smelting, and with its unique adsorption properties, it has become an indispensable material in the gold extraction process. Coconut shell activated carbon has a large specific surface area, large micropore volume, fast adsorption speed, large adsorption capacity for gold, better wear resistance, and is easy to reactivate and use. The commonly used particle size of activated carbon used for gold extraction is 6-16 mesh ≥90%.

2. Advantages of activated carbon

a. Good adsorption performance

Coconut shell activated carbon has a well-developed pore structure and a large specific surface area. It can efficiently adsorb gold ions in the solution and improve the gold recovery rate. According to data, the surface area of 1 gram of activated carbon is equivalent to the surface area of a football field. Such a large surface area makes activated carbon an ideal adsorbent. Its rich microporous structure is suitable for the adsorption of gold cyanide complex ions. Since the cross-section of the carbon micropores is similar to the diameter of the gold cyanide complex ions, the gold cyanide complex ions need to undergo a slow diffusion process before they can be adsorbed. In order to enhance the diffusion process, the slurry is fully stirred during the carbon slurry gold extraction process to facilitate the adsorption of gold by activated carbon. This unique structure enables activated carbon to have good adsorption performance for gold and can effectively extract gold, playing a key role in the gold extraction process.

b. High mechanical strength

Coconut shell activated carbon has high hardness and good wear resistance, which makes it suitable for long-term use. It is not easy to break in a stirring or flowing environment, reducing losses. Activated carbon with higher strength can maintain lower losses under strong impact and grinding. For example, the strength of commonly used gold extraction activated carbon is ≥97%, which ensures the stability of activated carbon in the process and reduces the loss of gold.

c. Renewability

After adsorbing gold, the activated carbon can be recovered through acid washing, thermal regeneration and other methods. Generally, the deactivated activated carbon is regenerated after 3 to 5 acid washings, and returned to the activated carbon adsorption section after removing organic matter. This not only reduces the loss of carbon, but also saves electricity, and has no effect on the adsorption rate. Through these methods, the activated carbon can be recycled, thereby reducing the cost of gold extraction.

3. Principle of gold extraction by activated carbon

When selecting activated carbon for gold recovery, key properties such as strength, saturated gold loading capacity, adsorption rate and separation rate need to be considered. Activated carbon with higher strength can show greater wear resistance in the carbon slurry process and reduce gold loss. Activated carbon with high adsorption rate, high saturated gold loading capacity and high separation rate can improve the efficiency and yield of gold extraction.In general, the principle of activated carbon for gold extraction is to achieve effective adsorption and extraction of gold through its unique porous structure and chemical properties. This principle provides an efficient, economical and environmentally friendly method for gold smelting.

With the development of the global economy and people's demand for wealth preservation, the demand for gold as an important precious metal continues to grow. Activated carbon used for gold extraction plays a key role in the gold extraction process. Guangyuan Carbon insists on coconut shell activated carbon all year round, and the spot of gold carbon is abundant, providing a stable supply channel for the market.

· Fujian Guangyuan Carbon Products Co.,Ltd.