The speed of the hammer mill also affects particle size. Particle size increases as rpm is decreased and as the flow of grain into the mill increases. Roll steamed or high moisture grains. Crumble pelleted feeds to improve intake in certain instances. Processing grains with a roller mill may produce a product similar to grinding but results in a more uniform final product.
Roller mills are generally more expensive than hammer mills but cost less to operate.
Rolling is the best processing for wheat and oats under most situations. Rolled oats are desirable in some baby pig diets. Roasting And Extruding Roasting and extruding are used primarily to process soybeans. Raw soybeans contain toxic compounds that reduce pig performance. Soybeans must be heated to destroy these compounds.