These dusts are complex in composition, which will not only cause great harm to respiratory tract and eyes, but also have a short residence time in the air when the particle size is larger than 10 micron, so they can effectively stay in the respiratory tract and not enter alveoli during breathing. However, because wood dust contains wood tar, which is composed of various phenols and hydrocarbons and contains strong carcinogens, in the long run, some workers will suffer from bronchitis, asthma, emphysema and other diseases. Wood powder with particle size less than 10 micron will directly enter human lung tissue and precipitate in alveoli, which may cause chronic fibrosis of lung tissue and even lead to a series of pathological changes such as cor pulmonale and cardiovascular diseases. Moreover, these inhalable substances will also bring a variety of pollutants or germs into the lungs, which is very harmful to the human body. If dust bounces or flies into people's eyes, it will cause injury and affect normal operation. In addition, sawdust is one of the most dangerous flammable materials, which is easy to cause fire. In addition, suspended dust will increase the abnormal wear and tear of production equipment, shorten the service life of equipment and increase the maintenance cost, thus having an inestimable impact on the output and economic benefits of enterprises.
Therefore, staff should do personal protection, such as wearing professional dust masks at ordinary times, paying attention to cleaning hair, face and nostrils after work, and eating more lung-clearing foods, such as pig blood and fungus.