Cutoff grade

Cutoff grade

In mining, the mine cutoff grade is the level of mineral in an ore below which it is not economically feasible to mine it. The mill cutoff grade is the level below which already mined ore is not worth processing.

The mine cut-off grade is estimated or chosen during a mining feasibility study.

The cut off grade for different elements is: Iron - 55% Aluminium - 30% Copper - 5% Gold - 0.0001% Uranium - 0.0003%



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