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Coal Hardgrove Plate Mill

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Jan 01, 2012nbsp018332the hgi of the four coals were measured as 72, 57, 46 and 36, respectively, covering a wide range from medium soft coal to very hard coal. 2.3. modified hardgrove mill test. the modified hardgrove mill is composed of a driving system, grinding components from standard hardgrove mill and a t20wn torque meter.

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