Name: 25KW Low-Frequency Induction Melting Furnace 1-20KHz
SKU: IHL25K
Price: 9490.50 USD
Availability: InStock

<h2>What Are Induction Furnaces?</h2>
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An induction furnace generates heat within a conductive metal charge through electromagnetic induction: alternating current flowing through a water-cooled copper coil creates a rapidly oscillating magnetic field that induces circulating eddy currents (Foucault currents) inside the metal. The electrical resistance of the metal converts these currents to Joule (I2R) heat, raising the metal temperature to its melting point without external combustion or contact with a radiant heat source. The same Lorentz force (J x B) that induces eddy currents also creates electromagnetic stirring (EMS) in the molten bath, a bulk fluid motion that homogenizes alloy additions, dissolves inclusions, and floats slag to the surface without mechanical stirring. Induction furnaces can melt virtually all conductive metals: steel, iron, copper, aluminum, gold, silver, platinum-group metals, and many alloys. Choose induction furnaces when combustion-free, precisely controlled, and self-stirring metal melting is required, particularly for precious metals, high-purity alloys, and laboratory research applications.
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<h2 dir="ltr">What You Will Find:</h2>
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Low-Frequency Induction Heaters provide deep heat penetration for hardening and melting both ferromagnetic and nonferrous metals.
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Tilt-Pour Melting Furnaces feature specialized melters that make handling and pouring molten metal batches safer and much easier.
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Auto-Feeding Rod Furnaces streamline forging workflows by automating the heating of steel rods for consistent production speeds.
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Integrated Safety Systems protect your gear with automatic shutdowns for overvoltage, overheating, and low water pressure.
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Digital Control Displays show real-time frequency and current data so you can monitor your thermal cycles at a glance.
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<h2>How to Choose an Induction Furnace</h2>
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Operating frequency
Induction furnace operating frequency determines the depth of electromagnetic penetration (skin depth) into the metal charge. High-frequency systems (50-500 kHz, used in IGBT-based laboratory units) have shallow skin depth, ideal for small charges and rapid heating of laboratory quantities (1 g-5 kg). Medium-frequency systems (1-10 kHz) penetrate deeper and are suited for larger heats (100 kg-100 tonnes) in industrial foundries. For laboratory melting of precious metals and small research heats, high-frequency IGBT power supplies are the standard choice.
Crucible material
The crucible holds the molten metal and must withstand both the operating temperature and the electromagnetic environment. Graphite crucibles are standard for most metals, including steel, iron, copper, and aluminum, but are not suitable for oxidizing atmospheres. Alumina (Al2O3) crucibles are used for non-ferrous metals and precious metals requiring higher purity. Silicon carbide-graphite (SiC-graphite) composite crucibles offer improved thermal shock resistance. Silicon carbide crucibles are preferred for aluminum alloys. Crucible selection must match the alloy composition and the maximum melt temperature.
Capacity and power
Laboratory induction furnaces for research and precious metal work are available with melting capacities from 1 kg to approximately 100 kg metal equivalent. Portable mini induction furnaces (IGBT high-frequency, 1-10 kHz, 1-3 kW power supply) melt 1-5 kg of gold, silver, or copper for jewellery, dental, or small research applications. Larger bench-top units (5-50 kW) melt 5-100 kg of steel or copper. Match the power supply wattage to the melting capacity: insufficient power extends heat time and reduces energy efficiency; excessive power can cause over-temperature and crucible damage.
Atmosphere control
Standard coreless induction furnaces operate in ambient air, which limits their use to metals not sensitive to oxidation at melt temperature. Vacuum induction melting (VIM) furnaces enclose the induction coil and crucible in a vacuum chamber (below 10-3 Pa), enabling the melting of reactive metals (titanium, nickel superalloys, rare earth alloys) and semiconductor-grade silicon without oxidation or nitrogen pick-up. Controlled atmosphere induction furnaces use an inert gas (argon, nitrogen) purge rather than a full vacuum, suitable for less reactive materials.
Energy efficiency
Induction furnaces save 20-30% energy compared to conventional resistive or combustion furnaces for equivalent metal melting tasks, because heat is generated inside the metal rather than conducted through a refractory layer.&nbsp;
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<h2>Specifications Context</h2>
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Induction furnaces with IGBT (insulated gate bipolar transistor) solid-state power supplies provide digital frequency control, precise power modulation, and energy efficiency above 90% at rated load, significantly improving on older SCR (silicon controlled rectifier) based systems. Electromagnetic stirring intensity increases with power level and frequency; excessive stirring at high power can splash molten metal out of shallow crucibles, requiring appropriate crucible geometry and fill level management. Skin depth in steel at 1,000 Hz is approximately 11 mm, concentrating heating near the surface; at 100 kHz, skin depth is approximately 1.1 mm, meaning high-frequency heating is efficient only for thin or small charges.&nbsp;
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Ready to upgrade your heating capacity? Explore our induction furnace range and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a friendly quote today.

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25KW Low-Frequency Induction Melting Furnace 1-20KHz

SKU : IHL25K