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Industry Gases The Nature Of The Gas
Sep 26, 2017

Industry Gases The nature of the gas

The nature and protection of oxygen, nitrogen and argon for industrial gases

Common industrial gases are oxygen, nitrogen, argon and carbon dioxide, etc., today we introduce three of them, for oxygen, nitrogen and argon, introduced about the nature of these three gases, hazards and protection, as follows.

1. Oxygen

Oxygen in the steel industry is the main purpose of strengthening the smelting process, it has become a leap in the development of the metallurgical industry an important way.

Oxygen nature: oxygen is a colorless, tasteless, odorless gas. Molecular weight 31.998. In the standard state, the density is 1.4289kg / m3, the gas specific gravity is 1.105 (with air 1), the melting point is -218.4 ℃, the boiling point is -182.97 ℃, the critical temperature is -118.4 ℃ and the critical pressure is 5.97MPa. Liquid oxygen (specific gravity of 1.13) is light blue, transparent and easy to flow.

Oxygen hazards and protection: Although oxygen is a necessity for human survival, but human inhalation of pure oxygen will get oxygen-rich disease. Liquid oxygen is not liquefied gas, but very combustion, spill liquid oxygen in case of combustible material, will cause burning and explosion. The fire extinguishing agent is mist water and carbon dioxide. Liquid oxygen contact with the skin can cause severe frostbite, the cell tissue has a serious damage.

Nitrogen gas

Nitrogen is the main raw material of nitrogen fertilizer industry. Nitrogen in the metallurgical industry is mainly used as a protective gas, such as rolling, galvanizing, chrome, heat treatment, continuous casting and so on to use it as a protective gas. In addition, blowing nitrogen into the blast furnace can improve the quality of iron. Nitrogen is widely used in the electronics industry, chemical industry, oil industry and glass industry.

Nitrogen properties: nitrogen is a colorless, odorless, odorless gas. Molecular weight 28.013. In the standard state, its density is 1.02506kg / m3, the gas specific gravity is 0.9674 (with air 1), the melting point is -210.5 ℃, the boiling point is -195.8 ℃, the critical temperature is -147.05 ℃, the critical pressure is 3.39MPa. Liquid nitrogen colorless and transparent and easy to flow, the specific gravity of 0.804 (water 1).

Nitrogen hazards and protection: Although nitrogen is non-toxic, tasteless, but it is a gas can make people or animals choking. Long-term in the nitrogen content of more than 82% of the environment, due to severe hypoxia in a few minutes asphyxia death. Once you inhale nitrogen, you should move it to fresh air. If you have stopped breathing, should be mouth to mouth artificial respiration; if breathing difficulties, should be timely oxygen, and asked the doctor to deal with.

3. argon

Argon nature and use: argon is an inert gas, people use the inert gas in the metal welding and cutting operations, as a protective gas, to avoid oxidation. The chemical inertness of argon is also used for the smelting of special metals. Argon blowing and protection is to improve the quality of steel an important way.

Hazard and protection: the same as nitrogen, can cause rapid suffocation, are choking gas. When stored and used, there should be enough ventilation. Once the existing choking symptoms are found, the initial ambulance treatment and nitrogen treatment are the same.