Gold adsorption mechanism of activated carbon (4)

After the long-term intense wear and wash of the activated carbon in the carbon slurry process, the anti-wear ability of the carbon is obviously increased, and the activity is significantly reduced. After regeneration, the activity is significantly restored, while the abrasion resistance is reduced. The reason for the above phenomenon is that the difference between the strength and activity of different activated carbons is due to the difference in the microporous structure of carbon and the degree of development of the surface active center, while the strength and activity of the same kind of activated carbon move with the movement of carbon in the process. The change is mainly due to the change in the microporous structure of the charcoal due to wear. Due to the non-uniformity of its structure, activated carbon is first lost in its active components during use. The activity of charcoal is reduced by physical loss (not including the activity caused by pollution factors). After being regenerated, the activated carbon produced a new microporous structure and the activity was significantly restored. Thus use of activated carbon - Wear - regeneration - abrasion is then extracting gold CIP process in the main contradiction. The activity changes of the new activated carbon before and after grinding are shown in Table 6.