Jun 23 2013 nbsp 0183 32Effective costs of Copper Processing Example of porphyry copper mine processing costs Assuming a freight cost of 163 20 ton of concentrate The total deduction are 163 0 61 0 56 0 41 163 1 58 The NSR per tonne of ore treated is thus As mining milling and other costs must be deducted from thisfigure it is apparent that this mine with