The unique grinding action of the XRDMill McCrone rapidly reduces troublesome particles to submicrometer sizes required for quantitative and qualitative analytical methods. Fortyeight cylindrical grinding elements produce both line contact blows and planar shearing, in contrast to the random contact blows of a conventional ball mill.
HP Marcy ball mill. The ball mill, with 40% of mill filling and 70% of its critical speed, is fitted with steel liners. It uses steel balls in a ratio of 70% of mm (3 inches) and 30% of mm (2 inches) as grinding media. The pulp density in the ball mill is maintained at 76% solids, and lime and cyanide are added to the mill feed.