Replacing mercury use and improving gold recovery in artisanal operations

This study aims to improve a process to recover gold in artisanal mining operations by treating a gravity concentrate with cyanide in a closed circuit in a ball mill, trapping gold particles in a capsule of activated carbon in the mill. The main innovation of this process is the use of the activated carbon inside the mill, with no need to remove the balls. Cyanide is safely degraded when the process is complete, with no residual damage to the environment, when the process is carefully applied.