Various usages of gas oxygen in all kinds of industries

• Metal welding, cutting and a variety ofcombustion-supporting gas for combustion systemand some oxidizing gas technical process gas, etc.
• Metallurgical industry, including steel, non-ferrous metal smelting process, all have extensive use of oxygen, it is obviouslystrengthening smelting processand increase energy efficiency.
• Machinery industry: metal welding, cutting can greatly improve the working efficiency
• Chemical industry: manufacturing pharmaceutical, dyestuff, explosives and other chemical products, in addition to strengthen the production (such as the production of yellow phosphorus by oxygen blowing method, spray oxygen carrier coal, etc.)
• Electronic industry: except for combustion-supporting gas or gas oxide semiconductor integrated circuit,oxygenis one of the indispensable high purity gases in the line.Additionally, it is the important raw material of gas optical fiber
• It is used widely in national defense : the largest amount is rocket.
• Other applications: oxygen as oxidant available for MHD power generation oxygen plant ;Use oxygen to purify sewage,  using oxygen in mining for deep well operations;Using oxygen to deep sea fishing, diving;Use oxygen rescue choking patient, dyingpatient;Using oxygen for health care (such as highland mountaineers, geological workers, border patrol soldiers and other special groups’ using and general staff stay in oxygen bar, etc.)

(source:http://www.airseparation-plant.cn/various-usages-of-gas-oxygen-in-all-kinds-of-industries/)