Description
A billet reheating furnace is a specialized billet temperature maintenance furnace designed to raise and stabilize the temperature of steel billets before rolling.
Unlike general billet heating furnaces, a billet temperature raising and maintenance furnace focuses on preheating billets from 750–850°C to the optimal rolling temperature, ensuring uniform heating and reducing surface oxidation.
It is widely used in continuous casting and rolling lines, providing reliable billet preheating and seamless integration with rolling mills.
🔹 Challenges in Billet Temperature Maintenance
In steel production, billet preheating is a critical step. Traditional reheating methods such as fuel-fired furnaces often cause:
* ❌Uneven billet temperature along length
* ❌Oxidation and surface scale formation
* ❌High energy consumption
* ❌Slow response to changing production speed
Modern billet temperature raising and maintenance equipment solves these issues by combining induction heating technology with automatic temperature control.
🔹 Induction Billet Reheating Furnace Solution
Yuantuo billet reheating furnace uses medium-frequency electromagnetic induction to efficiently raise billet temperature.
* Provides uniform heating throughout the billet cross-section
* Reduces surface oxidation and decarbonization
* Integrates with rolling mill feeding speed for optimal preheating
This billet preheating equipment is suitable for square billets, round billets, and pipe billets, and supports semi-finished billet rolling.
🔹 Advantages of Billet Temperature Raising Furnace
✅ High energy efficiency: 40–110 kWh per ton, reducing operational costs
✅ Minimal oxidation loss: surface scale ≤0.5%
✅ Precise temperature control: PLC-based closed-loop system with infrared measurement
✅ Faster preheating: short heating cycles improve production flow
✅ Flexible billet size compatibility: 60–200 mm square billets, length 3–12 m
✅ Lower maintenance: compared with flame furnaces
These advantages make billet temperature raising and maintenance equipment ideal for modern rolling mills seeking high-quality, energy-efficient preheating solutions.
🔹Working Principle
The billet temperature raising furnace converts industrial AC power into medium-frequency current:
1. The induction coil generates a high-density magnetic field
2. Eddy currents form inside the billet, producing internal heat
3. Heating is fast, uniform, and environmentally friendly
Compared with standard billet reheating devices, this system provides more accurate temperature control and energy savings.
🔹 Technical Specifications
* Power: 1000–12000 kW
* Frequency: 500–1200 Hz
* Capacity: 40–300 tons/hour
* Billet size: 60–200 mm square
* Length: 3–12 meters
* Energy consumption: 40–110 kWh per ton
* Control: PLC + Infrared closed-loop system
🔹 System Components
* Medium-frequency induction power supply
* Heating coil system
* Billet feeding and conveying system
* Infrared temperature measurement system
* PLC control system (Siemens S7 recommended)
* Cooling and support systems
The billet temperature maintenance furnace is fully automated, ensuring uniform preheating with minimal supervision.
🔹 Applications
This billet preheating equipment is ideal for:
* Continuous casting billet lines
* Steel bar and wire rod production
* Carbon steel and alloy steel billets
* Preheating billets for semi-continuous rolling
🔹 Conclusion
The billet reheating furnace (or billet temperature raising and maintenance furnace) is an essential solution for modern steel plants aiming to:
* Improve energy efficiency
* Reduce surface oxidation
* Ensure uniform billet temperature
* Support stable rolling production
With advanced Billet Heating Furnace, steel mills can achieve both high-quality steel and optimized energy usage.
