According to the product of 2 tons of melting furnace per hour, 6334 cubic meters of air, the effective air is about 4813 cubic meters.
According to the high calculation: according to the increase of 2.5 points, 4813*0.025=120.325 cubic pure oxygen. 1 cubic meter of pure oxygen is 1429g. 171.94kg is required.
According to the basic calculation: according to the increase of 2.0 points, 4813*0.020=96.26 cubic pure oxygen. 1 cubic meter of pure oxygen is 1429g. 137.556kg is required.
Each ton of product requires oxygen = 48-60NM3/H.