Danger of dust explosion. Dust explosion means that the dust meets a heat source (open flame or high temperature) within the explosion limit, and the flame instantly spreads to the whole mixed dust space. The chemical reaction is very fast, and a lot of heat is released at the same time, resulting in high temperature and great pressure. The energy of the system is converted into mechanical energy and radiation of light and heat, which has strong destructive power.

Every cubic meter of air contains 9.7g flour, which will burn instantly in case of fire, Mars, electric arc or proper temperature, forming a violent explosion with the power equivalent to a bomb.