... oxygen, petrochemical industry, papermaking, ozone producing, aquaculture, aerospace, welding and so on. oxygen generator4. The package and delivery timeIt ... Uses for Oxygen:Oxygen is used with fuel gases in gas welding, gas cutting, oxygen scarfing, flame cleaning, flame hardening, and ... oxygen are also used to make other metals, such as copper, lead, and zinc.Oxygen enrichment of combustion air, ...