Engineering economyhipolita st maria 3rd ed solution
Nov 15 2015· A cement grinding mill "A" with a capacity of 50 tons per hour utilizes forged steel grinding balls costing P12000 per ton which have a wear rate of 100 grams per ton cement milled Another cement mill "B" of the same capacity uses high chrome steel grinding balls costing P50000 per ton with a wear rate of 20 grams per ton cement milled