(a) the mine are was crushed to 2 inch size by joshua hendy crushers, one 12 by 24 inch and one 9 by 15 inch. (b) . the crusher product was ground to 4 per cent plus 48-mesh in two no. 64t marcy ball mills, each operated in closed circuit with a 4-foot 6-inch by l5-foot 9-inch don classifier,.
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