Process flow for using coconut shell activated carbon in gold refining

Gold-adsorbing activated carbon is made from high-quality coconut shells using physical methods and high-temperature steam activation processes. The activated carbon for gold has uniform particle size, high mechanical strength, and strong adsorption capacity. Manufactured through special processes such as water milling, it features good wear resistance and high adsorption performance, making it suitable for modern gold mining production. It is mainly used for the separation and extraction of precious metals in the gold metallurgical industry using heap leaching or carbon-in-pulp processes.

Gold-adsorbing activated carbon is made from high-quality coconut shells using physical methods and high-temperature steam activation processes. The activated carbon for gold has uniform particle size, high mechanical strength, and strong adsorption capacity. Manufactured through special processes such as water milling, it features good wear resistance and high adsorption performance, making it suitable for modern gold mining production. It is mainly used for the separation and extraction of precious metals in the gold metallurgical industry using heap leaching or carbon-in-pulp processes.

I. Raw Material Preparation and Ore Processing

Ore Crushing:First, the gold-bearing ore is mechanically crushed to an appropriate particle size (e.g., a few millimeters to tens of millimeters) to facilitate subsequent processing and adsorption.

Slurry Preparation:The crushed ore is mixed with water to prepare a slurry, which is used in preparation for subsequent chemical reactions and adsorption processes.

II. Cyanide Leaching

Addition of Cyanide: Cyanide (such as potassium cyanide or sodium cyanide) is added to the slurry, causing the gold to react with the cyanide to form a water-soluble gold cyanide complex. This step is crucial for gold extraction because it makes the originally water-insoluble gold soluble and easily adsorbed.

III. Activated Carbon Adsorption

Adding Coconut Shell Gold Extraction Activated Carbon: Pretreated coconut shell gold extraction activated carbon is added to the slurry containing cyanide complexes. Due to its well-developed pore structure and large specific surface area, coconut shell activated carbon can effectively adsorb cyanide complexes in the solution.

Thorough stirring and adsorption: The slurry is thoroughly stirred in the activated carbon adsorption tank to ensure that most of the cyanide complex ions can be adsorbed into the pores of the activated carbon.

IV. Separation and Regeneration

Gold-loaded activated carbon: The gold-adsorbed activated carbon is separated from the slurry, forming "gold-loaded activated carbon".

Desorption and Regeneration: Gold is desorbed from the activated carbon using specific methods (such as high-temperature roasting or the use of a desorption solution), restoring the activated carbon's adsorption capacity for reuse. This step not only recovers the gold but also achieves the recycling of activated carbon.

V. Gold Recovery

Electrolysis or other chemical methods: Gold is recovered from the desorbed solution, usually through electrolysis or other chemical methods. Electrolysis is a commonly used technique that uses an electric current to reduce metal ions in the solution to pure metal.

Safety and environmental protection issues during the refining process cannot be ignored; appropriate measures must be taken to prevent the leakage and emission of harmful substances. The gold refining process using coconut shell activated carbon is complex and delicate, involving multiple stages and key technologies. Through reasonable operating procedures and control conditions, the adsorption capacity of coconut shell activated carbon can be fully utilized, improving the efficiency and quality of gold refining.

· Fujian Guangyuan Carbon Products Co.,Ltd.