Reheating Furnace Manufacturer in India for Steel Rolling Mills

Therm process Engineering Pvt. Ltd. designs, supplies, erects and commissions reheating furnaces for steel rolling mills in India and overseas. A reheating furnace brings billets to uniform rolling temperature before they enter the mill. Therm process offers three main configurations: top-fired pusher, top & bottom fired pusher, and walking hearth. Capacities range from 10 TPH to 100 TPH. The furnaces handle MS, CS, SS and special alloy steels, fired on furnace oil, CNG, coal gas or LPG. Cold or hot charging is possible. Share your mill data and we will recommend the right configuration.

What Is a Reheating Furnace?

A reheating furnace heats semi-finished steel to the temperature needed for hot rolling. The steel may be billets, blooms or ingots. The furnace sits between the billet yard, or a continuous caster, and the rolling mill. It must deliver steel at the right temperature, at the right rate, with minimum scale loss and fuel use.

Most rolling-mill reheating furnaces are continuous. Charge enters at one end, moves through preheating, heating and soaking zones, and exits at the other. The main difference between furnace types is how the billets move. Pusher furnaces push the row of billets forward. Walking hearth and walking beam furnaces lift and carry them.

Charging can be cold, with billets from the yard at ambient temperature, or hot, with billets taken directly from a caster. Hot charging reduces the heat the furnace has to supply.

Getting this stage right affects everything downstream. Uneven billet temperature causes rolling defects and cobbles. Overheating increases scale loss. Fuel is often the single largest variable cost in a re-rolling mill.

Therm process Reheating Furnace Range

Therm process reheating furnaces are suited to MS, CS, SS and special alloy steels. Burners, recuperators and fuel systems are designed in-house.

Pusher furnace- top fired For standard billet sections. Capacity 10-65 TPH, charge 4-5 square x 1.5-12 m, published consumption 34 litres of FO per tonne. Automatic or manual temperature control.

Pusher furnace - top & bottom fired For higher cross-sections. Burners above and below the charge give uniform heat distribution, which is critical for even temperature across the billet section. Capacity 30-100 TPH, charge 6-10 square x 6-12 m, published consumption 32 litres of FO per tonne.

Walking hearth furnace Mainly for alloy steel and larger sections. Capacity 30-70 TPH, charge 6-12 square x 6-12 m. Therm process design data states 30°C temperature uniformity and scale loss under 1%, with no skid marks. The furnace can be emptied from either side.

Therm process also undertakes revamping of existing reheating furnaces. This includes fuel conversion to producer gas or dual fuel, burner replacement and heat recovery upgrades.

Technical Specifications

Key Features

• Three proven configurations, chosen by section size, grade and output.
• Up to 100 TPH in top & bottom fired pusher designs.
• Multi-fuel firing: FO, CNG, coal gas, LPG, plus producer gas and dual fuel options.
• Cold or hot charging.
• In-house burners and recuperators.
• Automatic or manual control of zone temperatures.
• Revamping capability for existing furnaces.

How a Reheating Furnace Works

• Charging Billets are placed at the charging end, cold from the yard or hot from the caster.
• Conveying A charging pusher advances the row (pusher type), or the walking hearth lifts and carries the charge forward.
• Preheating Outgoing flue gases warm the incoming billets.
• Heating Burners raise billets towards rolling temperature.
• Soaking Controlled firing equalises surface and core temperature.
• Discharge Billets are ejected to the roughing stand.
• Heat recovery Flue gases pass through the recuperator to preheat combustion air before leaving through the chimney.

Which Reheating Furnace Type Is Right for Your Mill?

Applications of Reheating Furnaces

• TMT and rebar rolling from MS billets.
• Wire rod and bar rolling.
• Structural section rolling of angles, channels and flats.
• Alloy and stainless steel rolling.
• Reheating for continuous forging lines.

Industries Using Reheating Furnaces

• Re-rolling mills. The largest user base in India.
• Integrated and secondary steel plants.
• Alloy and special steel producers.
• Forging plants with continuous billet heating.

Benefits of a Therm process Reheating Furnace

• Configuration matched to mill, not a single standard design.
• Uniform billet temperature for smoother rolling.
• Lower fuel per tonne through heat recovery and matched burners.
• Fuel flexibility to manage cost and availability.
• Single-source responsibility for furnace, combustion and heat recovery.

Custom Reheating Furnace Solutions

Share the following, and Therm process will size the furnace:

• Steel grades rolled
• Billet sections and lengths
• Target output in TPH
• Discharge temperature
• Cold or hot charging
• Fuel available and fuel cost
• Existing furnace data, for revamps
• Mill layout and discharge direction
• Automation level

Why Choose Therm process?

• Established 1997, Mumbai.
• Reheating furnaces supplied, erected and commissioned in India and abroad.
• Combustion specialists oil, gas, dual-fuel and producer gas burners, and recuperators.
• Furnace profiling to measure actual billet temperature during production.
• ISO 9001 & ISO 14001 certified, as stated by the company.

Related Therm process Products

• Pusher Furnace
• Walking Hearth / Beam Furnace
• Recuperator / Economizer
• Industrial Burners
• Furnace Profiling
• Accessories - Charging Pusher, Discharge Ejector

Frequently Asked Questions

Q1. What is a reheating furnace?
A reheating furnace heats billets, blooms or ingots to hot rolling temperature before they enter the rolling mill. Most are continuous furnaces with preheating, heating and soaking zones.
Q2. What types of reheating furnaces does Therm process make?
Therm process makes top-fired pusher furnaces, top & bottom fired pusher furnaces and walking hearth furnaces. It also revamps existing reheating furnaces.
Q3. What capacity reheating furnaces are available?
Therm process reheating furnaces range from 10 TPH to 100 TPH, depending on configuration. Top-fired pusher designs cover 10-65 TPH, top & bottom fired 30-100 TPH, and walking hearth 30-70 TPH.
Q4. What fuels can a reheating furnace use?
Therm process reheating furnaces can be fired with furnace oil, CNG, coal gas or LPG. Producer gas and dual-fuel firing are also possible.
Q5. What is the difference between cold and hot charging?
Cold charging loads billets at ambient temperature from the yard. Hot charging loads billets directly from the caster while still hot, which reduces the fuel the furnace needs.
Q6. Can an existing reheating furnace be upgraded?
Yes. Therm process undertakes revamping of reheating furnaces, including burner replacement, fuel conversion and recuperator installation.
Q7. What information is needed for a quotation?
Share steel grades, billet section and length, output in TPH, discharge temperature, charging method, fuel, and existing furnace details if revamping.

Looking for a Reheating Furnace Manufacturer in India?

Whether you are setting up a new rolling mill or upgrading an existing furnace, Therm process can recommend the right reheating solution. Share your steel grades, billet sizes, target TPH, fuel, charging method and plant location.

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