High-efficiency coconut shell gold extraction charcoal uses high-quality coconut shells as raw materials, and is refined through converter activation technology and air separation, crushing, screening and other treatments. It has high strength, uniform particle size, developed microporous structure, and selection of gold cyanide complexes.
Coconut shell gold adsorption carbon is currently a very widely used activated carbon in the gold industry. This activity is also called silver-loaded activated carbon. This kind of activated carbon usually uses granular activated carbon. Granular activated carbon uses coconut shell activated carbon. Nut shell activated carbon with high iodine value is used for gold adsorption.
High-efficiency coconut shell gold extraction charcoal uses high-quality coconut shells as raw materials, and is refined through converter activation technology and air separation, crushing, screening and other treatments. It has high strength, uniform particle size, developed microporous structure, and selection of gold cyanide complexes. It has strong adsorption, easy analysis and can be regenerated multiple times and used repeatedly.
High-efficiency coconut shell gold extraction charcoal has special adsorption properties for precious metals. It is mainly used for gold extraction by carbon slurry method and heap leaching method and for the separation and extraction of precious metals in the metallurgical industry. For example, in gold smelting, especially the carbon slurry method, it has an excellent effect on the gold extraction process by leaching. Mainly used for the extraction of gold and other precious metals using carbon slurry method.
Coconut shell gold activated carbon technical parameters
items | test data | items | test data |
partical size | 0.4-3mm | Density | 2-2.2g/cm3 |
Benzene powder adsorption rate | ≥450mg/g | Bulk density | 0.45-0.55g/cm3 |
strength | ≥80-95% | total pore volume | 0.7-1cm3/g |
iodine value | 1000-1100mg/g | specific surface area | 590-1500m2/g |
Methylene blue value | 100-150mg/cm3 | PH | 8-10 |
Half dechlorination value | ≤5cm | Ash | ≤8-12% |
moisture | ≤3% | specific heat | -1.00J/g.℃ |
Gold adsorption activated carbon generally includes powdered activated carbon and granular activated carbon. The activated carbon used in the carbon slurry gold extraction process is granular activated carbon. Since the gold-loaded carbon with adsorbed gold is filtered from the slurry using a sieve, in order to ensure effective screening of activated carbon in the slurry, there are certain requirements for the particle size of the carbon. Currently, most of the activated carbon used in carbon slurry plants has a particle size of 0.8mm or more (i.e. 20 mesh). Generally, the surface area of activated carbon is 600 ~ 1500m2/g. The larger the area, the higher the porosity, and certain molecules and molecules will be adsorbed on the surface of the carbon. ions are easier to produce. It can be said that the activity of activated carbon mainly depends on its porosity, internal surface area and the nature of functional groups.
The appropriate hardness index of activated carbon not only ensures that the carbon can withstand strong friction during the adsorption process, but is also the basis for maintaining high activity. A lot of practice shows that the higher the activity of carbon, the softer it is and therefore the easier it is to wear. This is mainly because during the activation process, more of the carbon structural skeleton is burned away, making it less dense and more durable. Research has proven that by screening, shape-separating and then density-separating activated carbon particles, light-component carbon particles and heavy-component carbon particles can be obtained. Activated carbon that is easy to wear has higher activity. Different activated carbons have different degrees of performance degradation after wear, especially the change in gold absorption speed is greater. Therefore, when choosing activated carbon, it is important to choose carbon with good wear resistance and high activity after wear.