May. 05, 2025
Coreless induction foundry Induction furnace is an industrial furnace that uses the principle of electromagnetic induction to melt metal. Its widely used in casting, metallurgy and other fields.
The core feature of the induction furnaces is the coreless design. The alternating magnetic field generates eddy currents in the metal charge to achieve efficient heating and melting. The following is a detailed introduction to the equipment. Let's explore it together.
Electromagnetic induction: Alternating current passes through the induction coil surrounding the crucible to generate an alternating magnetic field.
Eddy current effect: The magnetic field induces eddy currents in the metal charge (such as iron, steel, copper, aluminum, etc.), and Joule heat is generated due to the resistance of the metal, causing the metal to heat up to melt.
Stirring effect: The alternating magnetic field also promotes the natural flow of molten metal to achieve uniform composition (no additional stirring is required).
Induction coil: wound by a hollow copper tube, cooled by water, carrying medium and high frequency current (50Hz - 10kHz).
Crucible: Made of refractory materials (such as quartz sand, magnesium aluminum spinel, etc.), to hold molten metal.
Furnace frame & tilting system: Mechanical or hydraulic device for pouring molten metal.
Power supply system: IF includes frequency converter, capacitor bank (compensation for reactive power), control system, etc.
High efficiency & energy saving: The thermal efficiency of induction furnace can reach 60%75%, which is more energy-saving than electric arc furnace.
No pollution: No combustion process, reducing oxidation and gas inclusions, suitable for precision casting.
Flexible temperature control: The temperature can be precisely adjusted (±5℃), suitable for a variety of alloys.
Fast melting: IF depends on power supply power, usually several tons of metal can be melted per hour.
Simple maintenance: No electrodes or burners, but the crucible needs to be replaced regularly.
Foundry: Production of cast iron, cast steel, and non-ferrous metal castings.
Alloy preparation: Such as smelting of stainless steel and nickel-based alloys.
Recycled metal: Recycling scrap steel, aluminum chips, etc., environmentally friendly and efficient.
Fast melting speed and uniform metal composition.
Clean operation, suitable for areas with high environmental protection requirements.
High degree of automation, can be integrated with continuous casting system.
High initial investment (especially high-power equipment).
Requirements on charge size and conductivity (requires pretreatment of crushed materials).
High-frequency power supply may generate harmonic interference.
Power selection:
Select a suitable coreless induction furnace according to production capacity requirements (such as 120 tons/hour) and metal type.
Frequency selection:
Low frequency (50-60Hz): suitable for large-capacity smelting (such as cast iron).
Medium & high frequency (100-10kHz): suitable for small batches and high melting point alloys.
Safe operation:
Prevent molten metal leakage (check the crucible regularly).
Failure of the cooling system will damage the coil and requires real-time monitoring.
Crucible maintenance: cracks or erosion need to be replaced in time to avoid furnace penetration.
Coil insulation: avoid metal splashing and short circuit.
Capacitor failure: may cause power drop and requires regular inspection.
Regarding the coreless induction foundry Induction furnace, if you need more specific parameters (such as power configuration, refractory material selection) or specific induction furnaces solutions, please feel free to contact us.
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