Biomass pellet mill machine can process a variety of agricultural and forestry waste and organic raw materials into pellet fuel or feed, the specific applicable raw materials mainly include the following categories:

1. Wood raw materials
Common types: wood chips, sawdust, branches, bark, shavings, bamboo chips, etc.
Features:
High lignin content, high particle density after molding, high calorific value (about 4000-5000 kcal/kg).
It is necessary to control the moisture content of raw materials (12%-18%), and too high humidity will lead to loose particles.
Application scenario: wood products processing plant, furniture factory, forestry leftovers utilization.

2. Agricultural waste
Straw: corn straw, wheat straw, rice straw, cotton straw and so on.
Shell: rice husk, peanut shell, coconut shell, coffee shell, sunflower seed shell, etc.
Features:
The fiber content is high, but the lignin is low, and it may be necessary to add adhesives (such as starch) to assist the molding.
The calorific value is low (about 3000-4000 kcal/kg), but the cost is low and suitable for rural areas.
Pretreatment: It needs to be crushed to 3-5mm particle size and dried to 10%-15% moisture content.

3. Energy crops
Herbs: reeds, elephant grass, etc.
Woody: fast-growing poplar, eucalyptus, shrubs and other short rotation crops.
Features:
Specially grown for biomass energy production, with high and sustainable yields.
It is necessary to combine harvesting season and storage management to avoid mildew.

Raw material selection precautions
Moisture content: Raw materials need to be dried to 10%-18%, too high will lead to loose particles, too low will increase energy consumption.
Particle size: crushed to 3-5mm to ensure uniform feed and efficient compression.
Impurity control: Remove metal, sand and other hard objects to prevent damage to molds and rollers.
Adhesion: Low viscosity raw materials (such as rice husks) can be added 1%-3% starch to assist molding.
Corrosion: Raw materials with high chlorine or high sulfur (such as some stalks) may corrode the device. Therefore, use them with caution.

Through reasonable selection of raw materials and optimization of the process, biomass pellet mill machine can efficiently transform waste into high value-added products, both environmental protection and economy. In practical application, it is recommended to conduct small-scale test first, and then adjust the formula and parameters according to the results.