As the name implies, the double-chamber furnace has two furnace chambers, which are divided into a heating chamber and a waste chamber. The advantages of the double-chamber furnace make it widely used in recycled aluminum.
The atmosphere of the heating chamber and the melting chamber is strictly controlled. Using advanced gas monitoring technology, the oxygen concentration in the blast furnace gas is controlled below 1%-2%, which greatly reduces the oxidizability of the metal in the heating chamber. The melting chamber is the main furnace chamber for melting aluminum slag in the two chambers. Due to its unique process design, the melting chamber works in a reducing environment, which can effectively reduce the oxidation of the metal. The burner of the present invention is arranged in the heating chamber, and the combustion flame will not contact the aluminum material in the melting chamber, thereby reducing the burning loss of the aluminum. The SiC air preheater arranged between the heating chamber and the melting chamber keeps it below 700℃, avoiding the melting phenomenon before adding aluminum liquid to the aluminum liquid, ensuring the entire immersion process, and reducing the burning loss. Permanent magnets are used in the double-chamber furnace to stir the aluminum liquid between the two furnace chambers, so that the aluminum liquid temperature is uniform and the temperature difference is small, which prevents the local temperature rise of the aluminum liquid from being too high and reduces the metal burning; the aluminum liquid is stirred evenly, which will not damage the oxide film and reduce the loss of aluminum during melting.
Flue gas classification utilization: The flue gas passes through the heating chamber, silicon carbide air preheater, melting chamber and vertical furnace and other processes, so that the flue gas discharge temperature is about 150℃, so that the flue gas waste heat is fully utilized and the heat loss is minimized. Vertical furnace feeding: Continuous smelting technology is adopted to fill the vertical furnace with liquid, and the flue gas waste heat can be used directly, which reduces the heat loss of flue gas exhaust; the vertical furnace uses the hot blast furnace to further recover the heat of the flue gas. Configure permanent magnetic stirring equipment: By recycling the aluminum liquid, the temperature difference between the aluminum liquids is reduced (no more than 5℃), which prevents the local overheating of the aluminum liquid, achieves the purpose of energy saving and consumption reduction, and ensures the smelting quality. Furnace door closed feeding mode: Compared with the traditional open feeding method, there is no smoke leakage, less heat dissipation, and energy saving. The combustion system is highly automated: the temperature of each furnace chamber is accurately controlled within 20°C, which can effectively and stably control the high temperature in the furnace.
The double-chamber melting furnace solves these problems well, with the advantages of low metal burnout and low energy consumption. It is currently an advanced equipment for smelting and recycling aluminum waste.
