The chemical manufacturing is the process to deal with organic or inorganic raw materials, carrying out chemical conversion or processing into finished products. Some of the typical chemical processes include weighing, ingredients, mixing, drying, burning, calcination, moisturizing, classification, filtering and packaging. The chemical dusts are of high temperature and high pressure, inflammable, explosive, easy to poisoning, etc. For long-term work stations, the environment must be clean sanitation, to avoid hazard to workers and the surrounding environment