Oxygen is a common gas in our daily life. It can be said that our breathing is inseparable from oxygen.

Definition of Oxygen

Oxygen, ( the chemical formula is O2) is a colorless and odorless gas, which is the most common elemental form of oxygen. Melting point -218.4 ℃, boiling point -183 ℃. Not easily soluble in water. About 30mL of oxygen is dissolved in 1L of water. Oxygen is about 21% in the air. Liquid oxygen is sky blue. But it is very active at high temperature and can directly combine with various elements.

Use of Oxygen

• Main use

For combustion: The main purpose of oxygen is to support the continued combustion of objects, supply the oxygen needed for combustion, and etc.

For respiration: Oxygen is an essential gas for respiration. Lack of oxygen in the air can easily suffocate?

• Other uses

Iron and steel industry: By blowing high-purity oxygen into the converter to oxidize carbon, sulfur, phosphorus, silicon and other impurities in iron, it can shorten the smelting time and improve the quality of steel.

Non-ferrous metal industry: Smelting with oxygen-enriched air instead of air can reduce energy consumption, reduce the amount of harmful flue gas, and improve equipment production capacity.

Chemical industry: Oxygen is used in the production of chemical fertilizers from synthetic ammonia, which can strengthen the process and increase the output of chemical fertilizers.

Energy industry: coal gasification and coal gasification combined power generation.

Mechanical industry: metal cutting and welding.

National defense industry: liquid oxygen can be used as a combustion accelerant for rockets and supersonic aircraft, and combustibles soaked in liquid oxygen can be used as explosives.

Medical sector: first aid and auxiliary treatment of patients.