The first stage of wood pellet production line is raw material preprocess, in this stage, the raw material, such as wood chips or tree branches, need to be crushed, you can choose hammer mill, chipper or wood waste shredder in accord with your raw material.
Based our comparison tests to different pellet mill and common wood & biomass materials, the pellet produced from crushed raw material has better and consistent quality than that produced from rough raw material.
If your raw material is sawdust, or similar wood & biomass materials, you can skip this section in the process of wood pellet production line.
Whether the raw material is wood, grass, straw or any other type of biomass, it must be reduced to a sufficient uniform size at the stage of wood pellet production line. 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.
