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Common Types of Induction Furnaces for Metal Smelting
2022.09.30
Luoyang Judian – Your Reliable Partner for Industrial Melting Solutions
Induction furnaces are widely used in the metal casting industry for melting, holding, and pouring various metals. Understanding the different types of induction furnaces helps businesses choose the most efficient and cost-effective solution for their production needs.
At Luoyang Judian, we specialize in the design and manufacturing of industrial induction furnaces. In this article, we provide a clear and concise overview of the main classifications and their practical applications.
Classification by Structure
Induction furnaces can be broadly divided into two structural types:
Crucible Type (Coreless Induction Furnace)
Groove Type (Cored Induction Furnace)
1. Crucible (Coreless) Induction Furnace
These are the most commonly used in modern foundries. Based on frequency, they are further divided into:
Power Frequency (50/60 Hz)
Medium Frequency (typically 200–10,000 Hz)
Applications:
Power frequency furnaces are ideal for cast iron and non-ferrous metals, but not suitable for steel, due to excessive electromagnetic stirring that shortens refractory life.
Medium frequency furnaces are preferred for steel, copper, aluminum, and other alloys. They offer high power density, compact size, and fast melting, without needing a three-phase balance.
Advantages:
Simple crucible structure
Easy to install, inspect, and repair
Flexible operation—can be started or stopped at any time
Suitable for switching between different metal types
2. Groove (Cored) Induction Furnace
This type features a channel (groove) connected to the main bath, forming a closed loop. It can be designed as vertical or horizontal based on plant layout.
Applications:
Mainly used for non-ferrous metal smelting, such as copper, aluminum, zinc
Also used for holding and pouring cast iron in continuous casting or pouring lines
Advantages:
Higher electrical efficiency and power factor compared to crucible furnaces
Suitable for large-scale, continuous production
Limitations:
Difficult to inspect or repair refractory lining in the groove
Not ideal for switching between different metals
Requires insulation procedures when idle
Classification by Function
Induction furnaces are also categorized by function in the production process:
Melting Furnace – for fully melting solid metal
Holding Furnace – for maintaining molten metal at a constant temperature
Pouring Furnace – for controlled casting operations
At Judian, we offer all three furnace types to meet the needs of foundries, metal recycling plants, and non-ferrous processing industries.
Why Choose Luoyang Judian?
Extensive range of coreless and cored induction furnaces
Solutions for steel, aluminum, copper, and cast iron
Customizable designs for melting, holding, or pouring operations
Proven performance, high energy efficiency, and expert support
Looking to upgrade your smelting equipment or expand your production line? Luoyang Judian is ready to support your business with reliable, cost-effective induction furnace solutions.
Contact us today to discuss your project and get a custom quotation.
