A study on recovery of gold from decopperized anode slime

A study was performed on the chlorination and cementation of gold from an a node slime. The gold from decopperized anode slime first was dissolved with chlorine gas in aqueous medium later the dissolved gold was precipitated b y using a rotational copper disc, The effects of reaction temperature, reac tion period, stirring speed, solid-liquid ratio and Cl-2 gas flow rate on t he dissolution of gold were investigated. Increasing the solid-liquid ratio decreases the dissolution, the solubility increases with increasing reacti on temperature, reaction period and stirring speed. It was observed that th e Cl-2 gas flow rate hasn't a significant effect on the dissolution. As to the precipitation of the gold in the solution, the effects of temperature a nd rotational speed were sought for. The experimental results showed that t he gold recovery could be over 90 %. For the kinetics analysis of the cemen tation, the activation energy value was found to be 19.51 kJ.mol(-1).