Kalbon GAU – Gold Recovery
Kalbon GAU

Gold Recovery

Kalpaka Chemicals Private Limited manufactures KALBON GAU range of Activated Carbon, favoured as an adsorbent in the recovery of gold from mining operations. Due to its hardness, high gold adsorption kinetics, micro- pore favouring structure, coconut shell GAC is the heart of CIL (Carbon in Leach), CIP (Carbon in Pulp) and CIC (Carbon in Column) Operating systems for gold recovery.

KALBON GAU has been attentively and systematically processed taking into consideration, the factors influencing Gold adsorption like , Mixing efficiency, particle size of carbon, elution grade, temperature, pH, quality of carbon regeneration etc.,

Remarkably high Abrasion resistance and Impact hardness characterizing KALBON GAU, has offered the Gold Mining Industry, a high carbon activity profile and cost effective Adsorbent.

Revolutionary development in the gold mining process, optimization of the technology, and the search for Activated carbon which aids high gold yield has encouraged us to constantly review KALBON GAU Quality to keep pace with the requirements of our customers

CIP and CIL Plants are known to be harsh on Activated Carbon and therefore it is significant to choose the best Adsorption Media (Activated Carbon) that has the highest abrasion resistance, is highly active and possess right particle size with minimal fines and platelets. KALBON GAU has been particularity processed taking into consideration all the above factors and features that offer the highest recovery yield of gold.

Gold Recovery Process

Activated Carbon finds its best use in the process of recovery of gold from a gold cyanide complex form (dicyanoaurate). The processes that are dedicated to this mechanism of Gold Adsorption is the CIL (Carbon in Leach) and CIP (Carbon in Pulp) process.

Cyanide is a reagent that is used to leach gold from its ore and form a gold cyanide complex, a solution form, gold is then adsorbed onto the Activated carbon which is a renowned adsorbent that has a highly porous structure, and an appreciable kinetic adsorption characteristics.

CIL process is where, the Activated Carbon is added to leach tanks and the process of leaching and adsorption takes place in the same tank. CIP process differs from the CIL process in a way that, it is a sequential process, where, there are tanks that are dedicated separately for each of the leaching process and the adsorption process.

The Activated Carbon that is loaded with gold and some organic and inorganic impurities is transferred to elution where is it subjected to sequence of cold wash to remove the impurities, followed by washing with solvent to extract the gold from the adsorbed media.

Studies have confirmed that extraction of gold cyanide complex is strongly enhanced by the presence of KCl (Potassium Chloride) and CaCl2 (Calcium Chloride) electrolytes in the adsorption medium (Activated Carbon), furthermore, the recovery rate is increased by increasing the acidity of the Adsorption medium.

Common carbon mesh sizes used for water purification are