Aluminum Melting Furnace Types and Their Features

Release time:

Mar 16,2023

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The aluminum melting furnace is a new type of high-efficiency energy-saving furnace developed according to the aluminum smelting process and there are lots of aluminum melting furnaces types. It can well meet the requirements of the aluminum smelting process: strict alloy composition requirements, discontinuous production, and large single furnace capacity. , Reduce burning loss, improve product quality, reduce labor intensity, improve working conditions, and increase production efficiency. It is suitable for intermittent operations, smelting with a lot of alloys and recycled materials.

Aluminum Melting Furnace Types

Common Types of Aluminum Melting Furnace

According to the furnace structure, the common aluminum melting furnaces are mostly rectangular or circular. A reasonable furnace structure design can significantly improve the heat transfer effect of the aluminum melting furnace, increase the melting capacity, and reduce energy consumption.

Round Aluminum Melting Furnace

Under the premise of the same capacity, the inner volume of the circular aluminum melting furnace is larger than that of the rectangular furnace, and the heat intensity of the furnace volume is larger than that of the rectangular furnace, which can achieve a greater melting rate; at the same time, the circular structure is also convenient for the burner. The installation is conducive to organizing a reasonable airflow in the furnace, improving heat exchange efficiency, and reducing energy consumption for melting aluminum. In addition, the round aluminum melting furnace top opening and the charging operation mode are conducive to realizing fast furnace charging operation in a short period, shortening the charging time, and improving the charging operation rate. The sealing between them is also relatively easy to solve. Therefore, most of the large-scale aluminum melting furnaces newly built in China in recent years adopt circular structures.

Rectangular Aluminum Melting Furnace

When the circular furnace structure is used for production, the height of the workshop is significantly increased due to the need for opening the cover and slag removal operations, and it also occupies 2 to 3 furnace positions. Therefore, the utilization rate of the circular aluminum melting furnace workshop is relatively low, and the investment in plant infrastructure is also much higher than the rectangular furnace. For this reason, many manufacturers choose rectangular aluminum melting furnaces.

Vertical Aluminum Melting Furnace

The aluminum melting furnace with a vertical structure is widely used in some small and medium-sized enterprises and the die-casting industry. In this type of furnace, a vertical flue with a large cross-section is installed at the rear of the furnace, and a high-speed burner is installed at the bottom of the flue, the aluminum ingots and charge are added from the top of the flue and are quickly melted at the bottom of the flue by the impact of the flame. At the same time, the flue gas can fully exchange heat with the added cold charge during the discharge process, so the thermal efficiency of the shaft furnace is very high. , usually can reach more than 50%, the energy consumption index is relatively good.

According to the energy consumed by heating the aluminum melting furnace, the types of aluminum melting furnaces include reverberatory furnaces, resistance furnaces, and induction furnaces.

Reverberatory Furnace

The fuel used in the reverberatory furnace mainly includes natural gas, coal gas, heavy oil, etc. The air content of the fuel combustion has a great influence on the thermal efficiency of the reverberatory furnace. If the air content is too much, a large amount of air that does not participate in combustion in the exhaust smoke will take away a large amount of heat, resulting in low thermal efficiency. If the air content is too small, it will cause incomplete combustion of fuel and reduce thermal efficiency, and a large amount of polluting exhaust gas will be emitted.

Aluminum Melting Furnaces Types

Resistance Furnace

A resistance furnace is an industrial furnace that uses electric current to heat the electric heating element or heating medium in the furnace to heat the workpiece or material. It is divided into the direct heating furnace and the indirect heating furnace. It is a heating furnace that uses electric current to generate heat through resistive materials and can heat the charge to a very high temperature. For example, a carbon material graphitization electric furnace can heat materials to over 2500°C.

The direct heating furnace applies electric power directly to the material itself. Because the resistivity of the material itself is very small, a large current is usually required to meet the heating demand.

The indirect heating furnace is to connect the power supply to the heating element or other conductive medium so that the heating element or conductive medium generates heat. And the furnace material is heated indirectly through heat conduction, convection, and radiation. Most of the resistance furnaces currently on the market are indirect heating furnaces.

Aluminum Melting Furnaces Types

Induction Furnace

An induction furnace is an electric furnace that uses the induction electrothermal effect of materials to heat or melt materials. The main components of an induction furnace include an inductor, a furnace body, a power supply, a capacitor, and a control system.

Under the action of the alternating electromagnetic field in the induction furnace, eddy currents are generated inside the material to achieve the effect of heating or melting. Under the stirring effect of this alternating magnetic field, the composition and temperature of the material in the furnace are relatively uniform, the forging heating temperature can reach 1250°C, and the melting temperature can reach 1650°C.

Three Advantages of Induction Furnace

  • Fast heating speed, high production efficiency, less oxidation, and decarburization, saving material and forging die costs;
  • Superior working environment, improve the working environment of workers, no pollution, low energy consumption;
  • Small temperature difference between the core and surface, high temperature control accuracy.

Luoyang HTGP is a professional manufacturer of intermediate frequency induction aluminum melting furnaces. If you have related needs, please contact us, we will do our best to solve the problems in production for you.

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