ইন্ডাকশন ফার্নেস এমন একটি ডিভাইস যা ইন্ডাকশন হিটিংয়ের জন্য মাঝারি-ফ্রিকোয়েন্সি কারেন্ট ব্যবহার করে, widely used in metal melting, heating, and heat treatment. Its main components and their respective functions are as follows.
Furnace Body Components
- ইনডাকশন কয়েল:
- Made of wound copper tubing, it is the key component for generating the medium-frequency magnetic field.
- When medium-frequency current is passed through it, an alternating magnetic field is generated, inducing heat in the furnace charge.
- Furnace Lining:
- Made of refractory materials (such as silica sand, alumina, ইত্যাদি), it protects the induction coil and confines the molten metal.
- It has high-temperature resistance, insulation, and thermal insulation functions.
- Furnace Shell:
- Available in steel and aluminum shells, it serves as the outer casing of the furnace, providing support and protection.
- Steel shell furnaces are robust and suitable for large furnaces; aluminum shell furnaces are lightweight and flexible, suitable for medium and small furnaces.
- Magnetic Yoke:
- Made of laminated silicon steel sheets, it is used to converge and guide magnetic lines, improve heating efficiency, and reduce magnetic field leakage.
- Steel shell furnaces usually have magnetic yokes, while aluminum shell furnaces do not.
- Tilting Mechanism:
- Used to pour molten metal, available in hydraulic and mechanical tilting mechanisms.
- Hydraulic tilting provides smooth pouring, suitable for large furnaces; mechanical tilting has a simple structure, suitable for medium and small furnaces.
Electrical Components
- Medium-Frequency Power Supply Cabinet:
- The core control component of the induction furnace, including rectifier circuits, inverter circuits, and control circuits.
- Converts industrial frequency alternating current to medium-frequency alternating current and controls output power and frequency.
- Compensation Capacitor Bank:
- Used to compensate for the inductive reactance of the induction coil, improve the power factor, and reduce power loss.
- Water-Cooled Cables:
- Used to connect the medium-frequency power supply and the induction coil, transmit medium-frequency current, and cool the induction coil.
শীতলকরণ ব্যবস্থা
- Cooling Water System:
- Including water pumps, water tanks, cooling towers, ইত্যাদি, used to cool the induction coil, মাঝারি ফ্রিকোয়েন্সি পাওয়ার সাপ্লাই, and compensation capacitors.
- Ensures stable operation of the equipment at high temperatures.
Control and Safety Systems
- নিয়ন্ত্রণ ব্যবস্থা:
- Including PLC controllers, touch screens, ইত্যাদি, used to control the operating parameters of the induction furnace, such as power, frequency, and temperature.
- Enables automatic control and monitoring.
- নিরাপত্তা Protection System:
- Including overcurrent protection, overvoltage protection, overheating protection, furnace leakage alarms, ইত্যাদি, used to protect equipment and operator safety.
ইন্ডাকশন ফার্নেস কাজের নীতি
The working principle of an induction furnace is electromagnetic induction heating. When medium-frequency alternating current is passed through the induction coil, an alternating magnetic field is generated. This magnetic field penetrates the furnace charge, inducing eddy currents inside the charge. The eddy currents generate resistance heat inside the charge, thereby heating and melting the charge.
