The harm and influencing factors of sanding and polishing dust on human body. The harm of dust to human health is related to the nature of the dust, the size of the dust and the amount of dust entering the human body.
(1) The chemical nature of the dust that causes poisoning is the main factor that harms the human body. Because chemical properties determine the extent and speed at which it participates and interferes with biochemical processes in the body, and thus determines the nature and magnitude of the hazard. Some highly toxic metal dust (chromium, manganese, cadmium, lead, nickel, etc.) can cause poisoning and even death after entering the human body. For example, lead causes anemia, damages the brain, manganese, cadmium damages the nerves, kidneys, nickel can cause cancer, chromium can cause nasal septum ulcers and perforations, and increased incidence of lung cancer. In addition, they can directly cause harm to the lungs. Such as inhalation of manganese dust can cause toxic pneumonia, inhalation of cadmium dust can cause heart and lung insufficiency. Some heavy metal elements in the dust are very harmful to the human body.
(2) Causes of various pneumoconiosis After the general dust enters the lungs of the human body, it may cause various pneumoconiosis. Some non-metallic dust such as silicon, asbestos, carbon black, etc., cannot be ruled out after inhaling the human body, and will become silicosis and asbestos lung. Or pneumoconiosis. For example, dust containing free silica components can cause fibrous lesions when deposited in the alveoli, sclerosis of lung tissue and loss of respiratory function, and "silicon (silicon) lung" disease occurs.