Abstract：Wood dust samples with different particle size distribution coming from poplar dust, masson pine dust and camphor dust, commonly utilized in medium density fiberboard production, and sanding dust were used to investigate the minimum ignition energy (Emin) . The results show that the Emin increase with increase of particle size. The Eminof sanding dust is significantly lower than those of poplar dust, masson pine dust and camphor dust due to its light weight, large specific surface area and high nitrogen content. Analysis of variance show that the particle size distribution of dust has a significant effect on the Emin of wood dust, while the effect of dust species on the minimum ignition energy is insignificant.

Keywords：sanding dust; poplar dust; masson pine dust; camphor dust; minimum ignition energy; particle size distribution