... melting, paper making, chemical industry and medical usage. This plant is widely used in the fields of steel melting, ... to use PSA (pressure Swing Absorber) Oxygen Genoration plant. This plant is also widely used in the fields of electric ... gas, Industry heater combustion-supporting, Casting cupola, Rich oxygen iron-smelting, Oxygen evaporating-bleaching-block liquid oxygenation in papermaking ...