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Induction Furnace Coil and Turns – Technical Specification1. Description

The Induction Furnace Coil is the main component responsible for generating the electromagnetic field required for melting metals. It consists of multiple turns of high-conductivity copper tubing, designed to carry high current at medium or high frequency, inducing heat in the charge material.

2. Function

• Generates alternating magnetic field for induction heating
• Converts electrical energy into heat
• Ensures uniform and efficient melting
• Operates in resonance with capacitor bank

3. Construction & Material

• Material: Electrolytic Copper (ETP Grade, ≥ 99.9%)
• Tube Type: Seamless hollow copper tube (round/rectangular)
• Cooling: Internal water cooling system
• Insulation: Fiber glass tape, mica, refractory coating
• Structure: Helical coil with uniform turn spacing

4. Coil Design Parameters

• Number of Turns: 8 to 25 (as per furnace capacity)
• Tube Size: 10 mm to 40 mm OD
• Coil Diameter: Customized as per furnace size
• Turn Spacing: Uniform for proper magnetic field

5. Technical Specifications

• Electrical Conductivity: ≥ 58 MS/m
• Operating Frequency: 500 Hz – 10 kHz
• Current Rating: Up to 10,000 A
• Cooling Type: Water-cooled
• Water Pressure: 0.2 – 0.4 MPa
• Flow Rate: 20–100 L/min
• Coil Surface Temperature: Up to 200°C

6. Cooling Requirements

• Continuous water circulation mandatory
• Inlet Temperature: ≤ 35°C
• Outlet Temperature: ≤ 55°C
• Use treated, low-conductivity water

7. Performance Features

• High current carrying capacity
• Uniform magnetic field distribution
• Low electrical and thermal losses
• Withstands thermal and mechanical stress
• Suitable for continuous operation

8. Advantages

• High efficiency and fast melting
• Long service life
• Stable operation
• Reduced energy consumption

9. Installation & Maintenance

The coil must be properly aligned inside the furnace shell and insulated from surrounding structures. Regular maintenance includes checking water flow, insulation condition, and scaling inside tubes to ensure reliable performance.

10. Applications

• Induction melting furnaces
• Steel, iron, and non-ferrous metals
• Medium and high-frequency systems

Induction Furnace coil insulation material