Comparison of Pin Mill and Hammer Mill in the Fine Grinding of Sphagnum Moss

Dried sphagnum moss was ground using a pin mill and hammer under various operating conditions, i.e., changes in the rotor frequency feed rate. The specific energy consumption of size reduction recorded. powder characterized by median particle size, width distribution (span), loose tapped bulk densities, Hausner ratio. Pin milling used less for than milling, especially when target below 100 μm. In both methods, mainly caused used. However, also dependent on production rate: higher rate, consumption. No such dependence observed with mill. span wider intermediate product range although difference decreased at fine coarse ends. A similar pattern found densities. flowability powder, as ratio, comparable between grinding methods.