Leach Reactors are used primarily for gold leaching, the recovery and upgrading of gold from gravity concentrate. High concentration cyanide solution is used to dissolve the gold particles into solution. The gold can be recovered from solution by direct electrowinning, carbon adsorption or zinc precipitation as required. This yields a much higher mineral recovery than the conventional shaking table for polishing of gravity concentrates. Leaching kinetics are accelerated by adding oxygen and agitating the solids with a high solidity impeller. This allows high recoveries in a shorter time keeping the footprint small. Different capacities and selectable materials are avaliable.