The ideal moisture content of the raw materials should be controlled between 13% and 18%. This range effectively balances the formability, mechanical strength, and calorific value of the particles. Too high or too low a moisture content will lead to problems such as poor discharge, loose particles, and increased energy consumption.
Moisture compatibility reference for different raw materials：
| Raw material type | recommended moisture content | characteristic description |
| Hardwoods (such as cedar and cedar) | 13%–16% | Easy to soften, good binding properties |
| Hard mixed wood | 14%–18% | High fiber density requires slightly higher moisture content for effective shaping |
| Straw materials | 12%–15% | High silicon content, high friction, prone to die blockage if moisture is too high |
| Bamboo shavings | 13%–15% | Fibers are long, with strong compression resilience, requiring precise moisture control |