Size Reduction
Whether the raw material is wood, grass, straw or any other type of biomass, it must be reduced to a
sufficient uniform size for the pellet mill. The general rule of thumb is the milled material going into the
pellet mill must be smaller than the die holes in the pellet mill. For example to produce 6mm pellets the
milled material must be smaller than 6mm. There are various types of equipment to conduct size
reduction; each has different abilities and strengths. In some cases one piece of equipment is
required, in other cases two are needed. For instance, to reduce logs down to size.