3. Reason of improvement
- Products (cast pipes) with diameters ranging from 450mm to 1600mm
are inserted in the annealing furnace with coating material inside the metal frame during casting adhered on the outer surfaces of the pipes. This coating material is an insulating material, thus the thermal efficiency is lowered within the furnace.
- By removing the coating material before inserting the products into the furnace, the furnace temperature is lowered from 1010?C to 950?C and the primary energy unit of kerosene fuel is reduced.
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