TECHNICAL DESCRIPTION INDUCTION FURNACE COIL & TURNS
1. Overview
The
Induction Furnace Coil is the primary component responsible for generating the electromagnetic field required to melt metal in an induction furnace. It consists of multiple turns of high-conductivity copper tubing, precisely engineered to handle high current and thermal loads while ensuring efficient energy transfer.
2. Construction Details
2.1 Coil Material
- Made from Electrolytic Tough Pitch (ETP) Copper / Oxygen-Free Copper (OFC)
- High electrical conductivity: 99.9%
- Excellent thermal conductivity for efficient heat dissipation
2.2 Tube Type
- Seamless copper tube / rectangular hollow section (RHS) / square section (as per design)
- Internally water-cooled for continuous operation
2.3 Cooling System
- Continuous water cooling system
- Flow rate designed as per furnace capacity (typically 50300 LPM)
- Inlet & outlet manifolds provided with leak-proof joints
3. Coil Turns Specifications
3.1 Number of Turns
- Typically ranges from 3 to 12 turns
- Furnace capacity (e.g., 500 kg to 30 MT)
- Operating frequency (Medium / High Frequency)
3.2 Turn Spacing
- Uniform spacing between turns for optimal magnetic field distribution
- Maintained using high-strength insulating spacers
3.3 Turn Geometry
- Cylindrical helical structure
- Precisely wound to maintain concentric alignment with furnace crucible
4. Insulation & Lining Support
- External refractory support for mechanical strength
- Designed to withstand high temperatures and electrical stress
5. Electrical Parameters
- Designed for high current (kA range)
- Low electrical resistance to minimize losses
- Medium Frequency Induction Furnaces (250 Hz 10 kHz)
- Power ratings from 100 kW to 30 MW
6. Mechanical Features
- Robust structure with strong support brackets
- Thermal expansion allowance incorporated
- Easy installation and maintenance access
7. Safety Features
- Leak detection provision (optional)
- Overheating protection compatibility
- High dielectric strength insulation
8. Performance Characteristics
- Uniform heat distribution
- Long service life under continuous operation
9. Applications
- Steel melting (TMT, billets, ingots)
- Cast iron and alloy steel production
- Non-ferrous metal melting (Aluminum, Copper, Brass)
- Foundries and rolling mill plants
10. Customization Options
- Coil diameter and height as per furnace size
- Number of turns based on frequency and load
- Copper tube size (round / rectangular)
- Water cooling design (single / multi-circuit)
- Insulation grade based on temperature requirements
11. Standards & Quality
- Manufactured as per international standards
- Pressure tested for water leakage
- Electrical insulation tested before dispatch
- Suitable for export-grade applications
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