Stirred Mills – Ultrafine Grinding ScienceDirect
· The number of grinding media per unit volume can be estimated knowing the diameter of the grinding media, ... Figure shows the effect of steel ball size in a litre tower mill grinding a pyrite concentrate and quartz feed. Yan et al. showed an increase in size reduction of quartz with increasing ball size from 3 to 6 mm. With 9 mm steel balls, the grind efficiency is similar to the 6 ...