... under room temperature, which is convenient, stable and economical Oxygen Making Machine Specification Model NoBGPOCapacity2~240Nm3/hPurity93±3%Initial Pressure0. ... Ferrous metallurgy: For electric furnace steel making ,blast furnace iron making,cupola oxygen blasting and heating and cutting, etc2. Non-ferrous metal ... extra purifying device for removing bacteria, dust and odor. Oxygen making machine