SlideShare
• Typical rolls are 600 mm (24 in.) in diameter with a 300mm (12in.) face to 2000 mm (78 in.) in diameter with a 914mm (36in.) face. ... (1 in.) to 20mesh in particle size. • In hammer mills for fine reduction the peripheral speed of the hammer tips may reach 110 m/s (360 ft/s); they reduce to 15 ton/h to sizes finer than 200mesh ...