Copper, lead, zinc smelting: oxygen enhanced combustion, reduce exhaust emissions.(2) Glass manufacturing: oxygen fuel combustion, replacing air combustion, reducing nitrogen oxide (NOx) generation, to meet environmental requirements.

In rocket propulsion systems, liquid oxygen (LOX) is used as an oxidizer, mixed with liquid hydrogen (LH₂) or kerosene, for use in rocket engines.

Oxygen top-blown converter steelmaking: pure oxygen injection accelerates the oxidation of carbon impurities and improves the quality of molten steel. arc furnace oxygen rich combustion: reduce electrode consumption, shorten the smelting time. Oxygen rich blast furnace: oxygen is added to