Progress of master of chemistry

Hazard of fluorine: There are hydrogen fluoride gas and fluorine-containing dust in the workplace, which can invade the human body through the respiratory tract and esophagus. Inhalation of high concentration of hydrogen fluoride can cause acute poisoning, irritate eyes and respiratory mucosa, and in severe cases, bronchitis, pneumonia or pulmonary edema may occur, and even reflex asphyxia may occur. 50% of fluoride invading human body is deposited in human bones and teeth, and long-term contact will cause damage to bones and teeth. Hydrogen fluoride is extremely corrosive.

Measures:

Preventive measures for fluorine hazard and dust poison hazard. Sulfuric acid decomposes phosphate rock powder to release hydrogen fluoride gas, and hydrogen fluoride reacts with silicon dioxide in phosphate rock to release silicon tetrafluoride gas. Generally, escaping silicon tetrafluoride is absorbed by water, and there are two kinds of absorption equipment: absorption chamber and absorption tower. The maximum allowable concentration of hydrogen fluoride in the workshop is 1mg/m3. When the concentration exceeds this level, you should wear a self-priming filter gas mask (full face mask) or air respirator. It is recommended to wear oxygen or air respirator in case of emergency or evacuation. Also pay attention to skin protection. Special masks should be worn in posts that produce fluorine-containing dust. In order to prevent the accumulation of fluorine-containing gas or dust, ventilation should be strengthened and the equipment should be sealed. Workers exposed to dust should have regular physical examinations and establish health monitoring files.