Oct 27, 2021 · The e xisting processing plant which has a capacity of Mt/y consists of crushing, grinding, flotation, thickening and filtration producing a saleable nickel concentrate, with % Ni, 4. 57 % Cu, 0. 25 % Co and 1. 17g/t Au. Flotation tailings are pumped to a ta ilings storage facility constructed via downstream raises.