A medium-frequency induction furnace is a type of electric furnace used for melting metals, particularly in foundries and metalworking industries. induction furnace structure is designed to generate heat through electromagnetic induction and melt metals efficiently. Below is an overview of its key components and structure.
1. Power Supply System
- মাঝারি ফ্রিকোয়েন্সি পাওয়ার সাপ্লাই: Converts standard AC power (50/60 Hz) into medium frequency AC (typically 150 Hz to 10,000 Hz). This is achieved using a rectifier, inverter, and capacitors.
- Rectifier: Converts AC to DC.
- Inverter: Converts DC back to AC at the desired medium frequency.
- Capacitors: Store and regulate electrical energy to ensure stable operation.
2. ইনডাকশন কয়েল
- Copper Coil: A water-cooled copper coil surrounds the crucible. It generates an alternating magnetic field when medium frequency AC passes through it.
- Magnetic Field: The alternating magnetic field induces eddy currents in the metal charge, generating heat through resistance.
3. ক্রুসিবল
- Refractory Lining: The crucible is made of refractory materials (যেমন, ceramic or graphite) to withstand high temperatures and contain the molten metal.
- Tilt Mechanism: Some furnaces have a tilting mechanism to pour molten metal.
4. শীতলকরণ ব্যবস্থা
- Water Cooling: The induction coil and other components are water-cooled to prevent overheating and ensure efficient operation.
- Cooling Tower or Chiller: Maintains the temperature of the cooling water.
5. নিয়ন্ত্রণ ব্যবস্থা
- PLC (Programmable Logic Controller): Automates and monitors the furnace operation.
- Temperature Sensors: Measure and regulate the temperature of the molten metal.
- Frequency and Power Controls: Adjust the frequency and power output for optimal melting.
6. Furnace Body
- Steel Frame: Provides structural support for the furnace.
- অন্তরণ: Minimizes heat loss and improves energy efficiency.
7. Charging and Pouring System
- Charging Hopper: For adding raw materials (scrap metal, alloys, ইত্যাদি).
- Pouring Spout: For transferring molten metal to molds or ladles.
8. নিরাপত্তা বৈশিষ্ট্য
- Overheat Protection: Prevents damage from excessive temperatures.
- Leak Detection: Monitors for molten metal leaks.
- Emergency Shutdown: Ensures safe operation in case of malfunctions.
কাজের নীতি
- The power supply generates medium frequency AC, which flows through the induction coil.
- The coil creates an alternating magnetic field, inducing eddy currents in the metal charge.
- The resistance of the metal to these currents generates heat, melting the metal.
- The molten metal is then poured for casting or further processing.
Advantages
- High energy efficiency.
- Precise temperature control.
- Clean and environmentally friendly (no combustion gases).
- Suitable for a wide range of metals and alloys.
This structure makes the medium-frequency induction furnace a versatile and efficient tool for metal melting applications.