Effects of moisture on grinding of natural calcite by a
Jan 01, 1993#0183;#32;The grinding experiments were conducted up to250 h using a tumbling ball mill made of alumina. Forty per cent of the mill volume ( dM3) was filled with 115 s 312 balls (20 mm in diameter) and g of calcite powder dried in an oven at 383 K for about24 h.