The biomass fuel pellet machine has standard requirements for raw materials in the production process. Too fine raw materials will cause the biomass particle forming rate to be low and more powdery. The quality of the formed pellets also affects the production efficiency and power consumption.

Generally speaking, raw materials with small particle size are easy to compress, and raw materials with large particle size are more difficult to compress. In addition, the impermeability, hygroscopicity and molding density of the raw materials are closely related to the particle size of the particles.

When the same material is at low pressure with different particle sizes, the larger the particle size of the material, the slower the molding density changes, but as the pressure increases, the difference becomes less obvious when the pressure reaches a certain value.

Particles with a small particle size have a large specific surface area, and wood chips are easy to absorb moisture and regain moisture; on the contrary, because the particle size of the particles becomes smaller, the gaps between particles are easily filled, and the compressibility becomes larger, which makes the residual internal content inside the biomass particles. The stress becomes smaller, thereby weakening the hydrophilicity of the formed block and improving the water resistance.

What are the standards for raw materials in the production of biomass fuel pellet machines?

Of course, there must be a small limit to the small size. If the particle size of the wood chips is too small, the mutual inlaying and matching ability of the wood chips will be reduced, resulting in poor molding or reduced resistance to breaking. Therefore, it is better not to be less than 1mm.

The size should not exceed the limit. When the particle size of the wood chips is greater than 5MM, it will increase the friction between the pressing roller and the abrasive tool, increase the extrusion friction of the biomass fuel pellet machine, and waste unnecessary energy consumption.

Therefore, the production of biomass fuel pellet machine generally requires that the particle size of the raw material should be controlled between 1-5mm.