Case Study · Metal Heat Treatment
High-Velocity Burner for a Metal Tempering Furnace
A car-bottom tempering furnace suffered a ±15℃ gradient and high scrap. An Eclipse TJ100 high-velocity burner with waste-heat preheated air narrowed the gradient to ±3–5℃ and saved 12–16% gas.
The challenge
The old burner's low flame velocity left a large furnace gradient; parts varied ±15℃, tempering hardness was uneven and scrap was high.
The old burner's 10:1 turndown fit the multi-stage process poorly; it flameout at low-temperature hold.
Frequent loading/unloading swung the furnace temperature sharply with slow recovery.
An environmental upgrade required lower NOx and recovering waste heat for preheated combustion air to save gas.
What we supplied & did
Selected an Eclipse TJ100 high-velocity burner, up to 50:1 turndown, for the full heating / high-temp hold / low-temp hold heat-treat process.
Recovered waste heat into preheated combustion air; the TJ series supports up to 315℃ preheated air for higher thermal efficiency.
Fitted a Dungs gas safety valve train, pressure monitoring and UV flame detection with flameout/pressure-abnormal interlock.
Linked the modulating control to the customer PLC to auto-adjust output from the furnace thermocouple.
Tuned the high-velocity jet on site to strengthen internal air circulation and shrink the furnace gradient for the car-bottom structure.
Measured results
What changed on the line
The high-velocity jet stirs the hot air; furnace uniformity improved to ±3–5℃, tempering hardness is consistent and scrap fell.
50:1 turndown gives stable high/low load with no flameout at low-temp hold; temperature recovers faster after door opening, improving cycle time.
Preheated combustion air saved about 12–16% gas; NOx is compliant with the plant's environmental requirement.
The rugged burner structure runs long continuous heat-treat cycles with few faults and easy maintenance.
Equipment used in this project
Each category page covers what the part does, how it fails and what to check before ordering.
Running a similar duty?
Send the load, the fuel and the process profile — we come back with matching burner, controls and a safety train, and a quotation.
Request a QuoteKeep reading
Related solution
Metal Heat Treatment
How Zhongli Weiye equips this industry — products, FAQs and a field-proven project.
View solution →