Particle size reduction by a hammer mill I: Effect of
Particle size reduction by a hammer mill I: Effect of output screen size, feed particle size, and mill speed. A hammer mill is an impact mill commonly used in pharmaceutical manufacturing for reducing particle size for a variety of drugs. Commercial grade ammonium sulfate was milled as a model powder. This salt was sieved to obtain particle size fractions with average diameters of,, and mm whic .