Reverberatory furnaces are widely used to melt secondary aluminium scrap for eventual use by die-casting industries.The reverberatory furnaces has a deep bottom portion,side walls,front and rear walls and ceiling.Reverberatory furnaces is shaped like a rectangular prism.Disposed on the front wall works with burners.Long flame fuels(gas,oil or pulverized coal)is used.The material charging of flames desirable licking.Ceiling, is heated by heat supplied by the flame and the charge is heated by radiation.There is very little reaction during the charge in the furnace with fuel and combustion products.Fuel is used to provide the heat required in the oven and it passes through the heat procured charge more radiation.