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Grinding Of Iron Ore Can Be Done By Dry Grinding

wo2009077940a1 a method of grinding a mineralcontaining,a method of grinding a mineral-containing ore, which includes grinding the mineral-containing ore in a primary milling process and thereafter fine grinding the mineral-containing ore in a secondary ball-mill. a composite grinding medium comprising a mixture of steel balls and pebbles is used in the secondary ball-mill. the pebbles have an average size which is relatively smaller than the.case study of dry hpgr grinding and classification in,closed circuit with dry air classification to produce a 125 m iron ore pre-co ncentrate for final magnetic separation beneficiation. as an alternative, a direct grinding of the 50 mm feed in.

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