Tech Team · Kintek Solution

The working frequency of an induction furnace typically ranges from 50 Hz to 10,000 Hz, with a common operational range of 150 Hz to 8000 Hz, which is categorized as medium frequency. This frequency range is chosen based on the specific requirements of the melting process, such as the type of material being melted, the volume of the melt, and the desired melting speed.

Detailed Explanation:

1. Frequency Range and Its Significance:

   • The frequency of an induction furnace directly influences the efficiency and effectiveness of the melting process. Lower frequencies (50 Hz to 500 Hz) are typically used for larger furnaces and for materials that require deeper heat penetration, such as iron and steel. These lower frequencies have a greater skin depth, allowing the heat to penetrate more deeply into the metal, which is beneficial for larger masses of metal.
   • Higher frequencies (above 1000 Hz to 10,000 Hz) are used for smaller furnaces and for materials that melt at lower temperatures or require less heat penetration. These higher frequencies are more efficient at heating the surface layers of the metal, which is advantageous for smaller volumes or for metals that do not require deep heating.

2. Advantages of Medium Frequency (150 Hz to 8000 Hz):

   • Medium frequency induction furnaces are widely used due to their balance between heat penetration and energy efficiency. They offer high thermal efficiency, short melting times, and precise control over the temperature and composition of the molten metal. This frequency range is particularly effective for melting a wide range of materials, including non-ferrous metals and ferrous metals.
   • The use of medium frequency also reduces the burning loss of alloy elements, minimizes environmental pollution, and provides a clean and well-controlled melting process. These factors make medium frequency induction furnaces a preferred choice in modern foundries.

3. Operational Flexibility:

   • The ability to adjust the frequency within the operational range allows for customization of the melting process to suit specific needs. For instance, increasing the frequency can lead to higher power application for faster melting, while decreasing the frequency can enhance heat penetration for larger melts.

In summary, the working frequency of an induction furnace is a critical parameter that influences the efficiency, speed, and control of the melting process. The choice of frequency depends on the specific requirements of the material being melted and the operational parameters of the furnace, with medium frequencies (150 Hz to 8000 Hz) being commonly used for their balance of efficiency and effectiveness.

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