Welding

Smoke is a very small solid particle suspended in the air by melting and condensing after high temperature melting and gasification of metal or plastic, often less than 1 micron, commonly used in welding, casting and other operations, the composition of welding smoke is often a variety of metal oxides. The smoke generated by welding contains some suspended particles, toxic gases such as ozone, etc., and some metal suspended particles, which reach the alveoli through the bronchi and can cause diseases such as bronchitis, pulmonary edema and even pneumoconiosis.

Painting

Fog is tiny liquid particles suspended in the air, condensed by sprays and vapors. Commonly found in painting, mixing and cleaning operations. The painting environment is very harmful to the human body and can damage various systems of the body. Paint contains formaldehyde, benzene and other harmful substances, inhalation of too much paint volatiles, obvious irritation to the respiratory tract, can cause cough, shortness of breath, dyspnea. The nervous system can have dizziness, headaches, nausea, memory loss, etc. It also has a stimulating effect on the skin and eyes. For the gastrointestinal tract and circulatory system, there is some damage.

Chemical

Chemical plants can produce a lot of respiratory hazards and cause great harm to the human body. For example, toxic vapors, toxic gases. Inhalation can cause depression of the person's central nervous system and respiratory system. The main manifestations are limb weakness, dizziness, nausea and vomiting, and chest tightness. In severe cases, it can cause confusion, a faltering gait, convulsions, or coma.