The smelting equipment of the molten pool furnace is called a reverberatory furnace. The original reverberatory furnace is coal-fired and has a combustion chamber. The flame is reflected to the smelting chamber through the arched furnace roof. With the development of recycled aluminum technology, a large number of modern reverberatory furnaces no longer use coal as fuel, but more use oil and gas. The reverberatory furnace heated by fuel mainly consists of the furnace bottom, furnace wall and furnace roof to form a smelting chamber. A shallow and wide molten pool is formed to hold the metal charge and molten liquid metal.

There is a furnace door for charging and operation on the front of the furnace wall. Regular smelting furnaces are equipped with chimneys, which can effectively change the operating environment, save energy and facilitate the treatment of flue gas pollution. However, in reality, many factories do not have chimneys in their furnaces. Some are open, and some have smoke hoods on the furnace doors. During the smelting process of coal-fired furnaces, the high-temperature furnace gas from the combustion chamber rushes into the smelting chamber from the side windows, while the flames of oil and gas furnaces are directly sprayed into the furnace, heating the furnace roof and furnace walls, and also heating the furnace charge. The metal charge is heated and melted by the radiation of the high-temperature furnace gas and the heated furnace roof and furnace walls.

The structure of the reverberatory furnace varies greatly due to the different fuels used. Due to the large volume of the reverberatory furnace, its capacity can reach dozens of tons. At present, the largest furnace for smelting aluminum alloys can reach more than 50 tons. Therefore, it can melt various furnace materials and is very suitable for recycled aluminum enterprises with large production volumes. At present, the reverberatory furnace is the main equipment for smelting aluminum alloys. Reverberatory furnaces are rectangular and circular, and most of them are rectangular. This type of furnace is easier to build and has a lower cost. The circular reverberatory furnace has a high cost and is inconvenient to maintain, but the thermal energy utilization rate is higher.