A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many are many different types of mills and many types of materials processed in them. Historically mills were powered by hand or by animals (, via a hand crank), working animal (, horse mill), wind or water ().
31/05/2013 · "Stone burr mills produce the finest flour possible and are ideal for fine milling of dry, nonoily grains like wheat, corn, rye, oats, etc." "Iron burr mills are widely used for fine or coarse grinding of dry grains as well as a wider range of materials including higheroil substances like soybeans, oilseeds, coffee and spices, among others."