MODELLING OF BINARY MIXTURE COMMINUTION
calcite. Milling times were: 300 s, 900 s, 1800 s, 3600 s and 7200 s. Firstly, all quartz and the calcite samples was pre-viously crushed (separately) below 3.35 mm. Repre-sentative sample mass for grinding tests was calculated according to Gy's method (Wills and Napier-Munn, 2005). Ball diameter was selected with aid of the Bond eq-
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