Small Heat Treatment Furnace – Gas-Fired Bogie Hearth System for Precision Thermal Processing
JIANGSU YINUO THERMAL ENERGY TECHNOLOGY CO., LTD builds industrial-grade Small Heat Treatment Furnace systems. Chamber sizes and loading capacities can be customized to match the job. Gas-fired bogie hearth furnaces here run at 550℃ as standard, and that figure can be raised to 950℃. Temperature control stays at ≤±2℃, while heating zone uniformity holds within ±8℃. Assembly takes place in a 20,000㎡ facility, where more than 100 specialized engineers work. Every system pairs switchable pulse combustion or regenerative combustion with semi-automatic PID intelligent control and an Omron PLC. Stress relief annealing and heat treatment then run the same way each time.
Advanced Temperature Control Technology
Heat stays even across the whole heating chamber, thanks to multi-zone independent PID temperature regulation. Our product uses that setup to hold thermal uniformity. Temperature deviation lands at ≤±8℃ after one hour of heat preservation. Typical defects, such as uneven hardness and workpiece deformation, stop appearing.
Imported PID intelligent instruments and Omron PLC systems make up the control architecture. Semi-automatic mode and manual mode are both available to the operator. This dual-control design gives them fine adjustment room. At the same time, the automated side keeps the process steady, so metallurgical results come out repeatable.
Several zones watch the temperature, and you set each one up to suit the heat treatment process you run. Every zone works on its own. That way you can build thermal profiles that fit your material and your production schedule.
Technical Specifications
| Parameter |
Specification |
| Furnace Type |
Gas-Fired Bogie Hearth Furnace |
| Furnace Chamber Dimension |
Customized per Customer's Requirements |
| Loading Capacity |
Customized per Customer's Requirements |
| Working Temperature |
Standard 550℃, Adjustable up to 950℃ |
| Temperature Uniformity |
≤±8℃ (after 1h heat preservation) |
| Temperature Control Precision |
≤±2℃ |
| Heating Rate |
50–200℃/h (full loading) |
| Refractory Fiber Lining |
350 mm thickness |
| Fuel Medium |
Natural gas (8500 Kcal/Nm³) |
| Combustion System |
Switchable pulse or regenerative |
| Control System |
PID + Omron PLC, semi-automatic/manual |
| Furnace Door Speed |
Approx. 6 m/min, electric hoist |
| Bogie Moving Speed |
5–7 m/min, chain drive |
| Shell Temperature Rise |
Top ≤45℃, Side ≤40℃ (at 950℃) |
| Typical Application |
Stress relief annealing |
| Customization |
Available based on requirements |
Energy-Efficient Structural Design
The Small Heat Treatment Furnace features 350mm-thick refractory fiber lining in a multi-layer composite lightweight construction. This advanced insulation system dramatically reduces surface heat loss while maintaining furnace shell temperature rise at ≤45℃ on the furnace top and ≤40℃ on side walls, even when operating at maximum 950℃ working temperature.
A closed heat preservation shell keeps radiation losses down. Energy use drops by 25-40% next to ordinary heating furnaces. The combustion system burns natural gas with a calorific value of 8500 Kcal/Nm³. To get more out of the fuel, you can switch between pulse combustion (high/low fire) and regenerative combustion.
Under a full workpiece load, the heating rate can be set anywhere from 50-200℃/h. Thermal cycles then stay predictable. Energy performance does not suffer.
Flexible Loading & Operation System for Small Heat Treatment Furnace
With the bogie hearth design, you may specify bespoke chamber sizes and loading capabilities to meet your production requirements. The chain drive self-propelled bogie has the moving speed of 5-7 m/min and may totally travel beyond the chamber of the furnace for easy loading and unloading.
The workpieces are lifted onto the movable bogie surface. It can take enormous loads and retains its structural stability during heat cycling. The electric lifting furnace door adopts wedge lock construction and electric hoist drive, and the working speed of the door is around 6 m/min, which can provide the secure sealing in heat treatment operations.
Exhaust outlets are located at the furnace top and two side walls of the Small Heat Treatment Furnace with chimney height ≥2m above factory roof level for efficient control of heat and fumes.
FAQ
Q: What materials can be processed in your product?
A: Our system handles various metals and alloys requiring stress relief annealing, tempering, and normalizing processes. The adjustable temperature range up to 950℃ accommodates steel components, cast iron, and specialized alloys used in manufacturing and fabrication industries.
Q: How does the temperature uniformity affect heat treatment quality?
A: The heating zone holds within ±8℃. That small spread keeps metallurgical changes even across the whole workload. Soft spots and hardness differences do not get a chance to form, so parts keep their performance and service life.
Q: Can the chamber dimensions be customized for specific production needs?
A: Absolutely. Chamber dimensions and loading capacities are both built around your workpiece sizes, batch volumes, and production throughput requirements. Space gets used well, and the line runs efficiently.
Q: What maintenance intervals should be expected?
A: Check the heating elements, the combustion parts, and the control systems every 2,000 operating hours. Regular inspection keeps performance at its peak. All components meet national and industrial standards, and our quality management system makes sure of it. That is what gives you a longer service life.
Q: Does the system support automated operation?
A: Yes. PID instruments and an Omron PLC run the semi-automatic control mode. Temperature regulation, heating cycles, and process monitoring all happen automatically. Manual override is still there for specialized applications that need an operator to step in.
Contact Us for Custom Solutions
Email our engineering team at info@yinuofurnaces.com and tell us what your Small Heat Treatment Furnace needs to do. You will get a customized solution proposal in return.
