Medium frequency melting furnace

Medium Frequency Induction Furnace

In the modern metal processing industry, the medium frequency induction furnace, as a highly efficient and energy-saving melting equipment, plays a pivotal role. It is not only widely used in the smelting of ferrous and non-ferrous metals, but also demonstrates strong application potential in casting, forging, and scrap metal recycling. This article will provide a detailed explanation of the working principle, equipment structure, technical characteristics, application fields, and development trends of the medium frequency induction furnace.

I. Working Principle of Medium Frequency Induction Furnace

The working principle of the medium frequency induction furnace is based on electromagnetic induction heating technology. When alternating current passes through the induction coil, it generates a variable magnetic field around it. When this variable magnetic field acts on the metal workpiece placed inside, it generates eddy currents inside the metal. As the eddy currents flow inside the metal, due to the metal's own resistance, a large amount of heat is generated, causing the metal to heat up to a molten state. The current frequency used in medium frequency induction furnaces is typically between 1000Hz and 10000Hz. This frequency range makes electromagnetic induction heating more efficient and more uniform.

II. Equipment Structure

The medium frequency induction furnace is mainly composed of several major parts: power supply system, induction coil, furnace body, cooling system, and control system.

1. Power Supply System: Provides medium-frequency alternating current, usually including rectifiers, filters, inverters, and load matching networks. The performance of the power supply system directly affects the heating efficiency and stability of the melting furnace.

2. Induction Coil: The core component of electromagnetic induction heating, usually made of copper tubing, with cooling water inside to prevent overheating. The design of the induction coil is directly related to the heating efficiency and uniformity of the metal melt pool.

3. Furnace Body: Used to contain the metal to be melted, usually made of refractory materials, capable of withstanding high temperatures and maintaining the stability of the melt pool. The design of the furnace body needs to consider the thermal expansion, thermal shock resistance, and corrosion resistance of the materials.

4. Cooling System: Mainly used to cool the induction coil and some components of the power supply system to ensure the long-term stable operation of the equipment. The cooling medium is usually water or oil.

5. Control System: Achieves automated control of the melting process, including temperature control, power adjustment, and fault diagnosis. Modern medium frequency induction furnaces generally use PLC or DCS control systems, greatly improving the ease of operation and stability of the melting process.

III. Technical Characteristics

Compared with traditional resistance furnaces and fuel furnaces, medium frequency induction furnaces have the following significant characteristics:

High Efficiency and Energy Saving: Electromagnetic induction heating directly acts on the inside of the metal, resulting in high thermal efficiency and low energy loss.

Uniform Heating: Induction heating makes the eddy current distribution inside the metal uniform, resulting in good heating uniformity, which helps improve the performance of the metal material.

Easy to Control: By adjusting the power supply frequency and power, the heating speed and temperature can be precisely controlled to meet the needs of different melting processes.

Environmentally Friendly and Clean: No fuel combustion is required, reducing the emission of harmful gases and meeting the requirements of modern green production.

Strong Flexibility: Suitable for melting various metal materials, and the melting capacity is adjustable, making it highly adaptable.

IV. Application Fields

Medium frequency induction furnaces are widely used in the metal processing industry, including but not limited to:

Iron and Steel Smelting: Used for iron preheating and alloy steel smelting.

Non-ferrous Metal Smelting: Such as the smelting and alloy preparation of copper, aluminum, zinc, and magnesium.

Casting Industry: Provides high-quality molten metal liquid for casting.

Forging Industry: Preheating and melting metal billets to meet the requirements of forging processes.

Scrap Metal Recycling: Efficiently processes scrap metal to achieve resource recycling.

V. Development Trends

With the advent of Industry 4.0, medium frequency induction furnaces are rapidly developing towards intelligence and automation. In the future, medium frequency induction furnaces will pay more attention to energy efficiency improvement, adopt more advanced control algorithms, and achieve precise control of the melting process. At the same time, miniaturization and modular design of equipment will also become a trend to adapt to users of different scales and needs. In addition, the research and development and promotion of environmentally friendly and energy-saving medium frequency induction furnaces will help the metal processing industry achieve green development.

In summary, medium frequency induction furnaces, with their high efficiency, energy saving, and environmentally friendly technical characteristics, play an irreplaceable role in the metal processing industry. With continuous technological advancements and the expansion of application fields, medium frequency induction furnaces will usher in a broader development prospect.

Xi'an Aobang Technology Co., Ltd. is one of the earliest manufacturers in China to mass-produce medium-frequency furnaces. Main products include medium-frequency power supplies, IGBT power supplies, melting furnaces, heating furnaces, and a full range of induction heating equipment. Focusing on Induction Heating Equipment Research and Manufacturing Based in Xi'an, Aobang Technology, with its mission of "Technology Drives Industrial Heating Innovation," leverages core technologies accumulated from early mass production to provide customers with full-cycle services from equipment selection and installation and commissioning to process optimization.

Ancient City Welcomes Guests, Sharing Aobang's Feelings We look forward to collaborating with more industry partners to expand the innovative boundaries of induction heating technology. 13891865812 　Luo, General Manager