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Gold-extracting activated carbon
Author:Biyuan Activated carbon Update time:2016-10-29

Brief Introduction of gold-extracting activated carbon

use coconut shell as raw materials, prepared through water mill,etc a special process, with properties of good wear resistance, high adsorption. Mainly used for gold extraction of carbon slurry,heap leaching and the separation and extraction of precious metals in metallurgical industry, also can be used for water purification.


Technical Index of gold extracting activated carbon

Project First grade production  Second grade production
Particle size6-12目 % ≥90 ≥90
Wear resistance % ≥95 ≥95
Iodine adsorption value mg/g ≥1000 ≥900
Drying loss % ≤10 ≤10
Filling density g/ml 0.48-0.55 0.48-0.55

Four Kinds of Absorption Methods of Gold Extracting Activated Carbon

(1) desorption of hot caustic soda solution

(2) low concentration caustic soda solution plus alcohol desorption;

(3) desorption with caustic sodium cyanide solution under heating and pressure;

(4) high concentration caustic soda solution desorption.

Gold-extracting activated carbon

Gold-extracting activated carbon

Activated Carbon Extraction Technology

The mercury extraction method is an ancient gold extraction process, which is simple and economical, and is suitable for the recovery of coarse single gold. The key technology is how to take protective measures to eliminate mercury poisoning.

Cyanide method of gold extraction process is the modern ore or concentrate extraction of gold from the main method. Cyanide process gold extraction process includes: cyanide leaching, leaching of pulp washing filtration, cyanide or cyanide pulp slurry extraction of gold and finished the smelting of several basic processes.


Fundamental principles of gold extraction by carbon-in-pulp process

CIP process is one of the methods of gold extraction, which is the process of carbon adsorption of cyanide [KAu (CN) 2] after cyanidation leaching of gold-bearing materials. It has long been found that activated carbon can be adsorbed from the solution of the characteristics of precious metals, began to absorb only from the clear gold, gold-bearing smelting to recover gold. Since the cyanide pulp is subjected to solid-liquid separation to obtain clear liquid and activated carbon can not be returned to use, this method can not compete with the widely used zinc displacement method in industry. Later activated carbon directly from the cyanide pulp absorption of gold, thus eliminating the need for solid-liquid separation operations; gold-loaded activated carbon with sodium hydroxide and sodium cyanide mixture of desorption of gold and silver, activated carbon can be activated after the return to use. So the carbon slurry method has developed into a new technology, China has built production plant to extract gold by CIP method Linhu gold mine in Henan Province and Chiwei ditch Jilin Province.



1, coconut shell activated carbon in the transport process, should prevent mixed with hard material, not step on to prevent carbon particles broken, affecting the quality.

2, the storage should be stored in the porous adsorbent, so in the transport storage and use process, must be absolutely prevent flooding, due to flooding, a large number of water filled with active space, it lost its role.

3, fire protection: activated carbon in storage or transportation, to prevent direct contact with the fire source to prevent fire, activated carbon regeneration and avoid oxygen regeneration completely, after regeneration must be cooled to 80 ℃ with steam cooling, or high temperature, oxygen , Activated carbon will occur spontaneous combustion.

Gold-extracting activated carbon:

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