A Comprehensive Guide to Reheating Furnaces by SajjanSon Engineers
Reheating furnaces are essential components of steel rolling mills, serving the crucial purpose of heating steel blooms, billets, or slabs to temperatures of approximately 1200°C. At this temperature, the steel becomes malleable, allowing the rolling process to begin. Reheating furnaces ensure a consistent heating process, from charging the cold steel stock at the entrance to discharging the heated material at the exit.
In these furnaces, heat transfer occurs through radiation and convection, facilitated by burner gases and furnace walls. This highly efficient process ensures that the steel stock is evenly heated, setting the stage for precision rolling and shaping.
How Does Heat Transfer Work in a Reheating Furnace?
The initial temperature of the steel stock can range from ambient to as high as 1200°C. Factors such as the dimensions of the steel stock, rolling speed, and steel composition influence the final exit temperature. The surface and gradient temperatures are determined by the quality of steel, which imposes specific limitations.
Both liquid and gaseous fuels are used in reheating furnaces, offering flexibility in operation and accommodating various production requirements.
Key Characteristics of a Reheating Furnace
The performance of a reheating furnace is measured in tons of steel heated per hour. Its energy efficiency depends on the heat imparted to the stock, the type of fuel used, and the furnace's design features. Efficiency is calculated by dividing the heat required to raise the steel's temperature by the energy provided by the fuel.
Design Features Enhancing Energy Efficiency
Energy-efficient reheating furnaces incorporate specific design features to ensure uniform heating and minimize fuel and labor usage. These features include:
Advanced burner designs.
Optimal furnace dimensions.
Multi-zone heating configurations.
Effective roof and wall insulation.
Well-designed skids.
Combustion air and fuel preheating systems.
The goal is to provide consistent heating with minimal heat losses, ensuring high productivity and energy conservation.
Operational Parameters for Optimal Efficiency
For a reheating furnace to perform efficiently, the following parameters must be met:
Heat must be imparted to the charge effectively.
Necessary heat should be generated while minimizing steel losses.
Heat transfer to the stock must be uniform.
Temperature equalization within the stock is critical.
Heat losses from the furnace must be minimized.
While ideal operations involve consistent steel dimensions and composition, real-world conditions often introduce variations, affecting furnace efficiency.
Classification of Reheating Furnaces
Reheating furnaces can be classified based on:
Heating Method:
Electrical Heating
Combustion Heating (using solid, gaseous, or liquid fuels)
Charging Method:
Manual or automated charging systems.
Steel Stock Movement:
Pusher Furnace
Walking Beam Furnace
Roller Hearth Furnace
Walking Hearth Furnace
Rotary Hearth Furnace
Heat Recovery Method:
Regenerative Type (with regenerative burners)
Recuperative Type (with recuperators)
Each type offers unique advantages, making them suitable for different production requirements.
Why Choose Reheating Furnaces from SajjanSon Engineers?
At SajjanSon Engineers, we specialize in designing and delivering high-quality reheating furnaces tailored to meet the demands of modern steel rolling mills. Our furnaces are built for:
Superior energy efficiency.
Precise temperature control.
Durability and reliability.
With a focus on innovation, technology, and stringent quality checks, we ensure our furnaces deliver exceptional performance and help optimize your production processes.
Contact SajjanSon Engineers for Advanced Reheating Furnace Solutions
📍 Address: 123, F.I.E., Patparganj Industrial Area, Delhi - 110092
📧 Email: sajjansonengineers@gmail.com
📞 Phone: 9811131019
Take your steel rolling processes to the next level with SajjanSon Engineers' advanced reheating furnaces. Let’s shape the future of your business together!
