Precautions for selection of box type tempering furnace

When selecting a box type tempering furnace for industrial or laboratory scenarios, multiple factors need to be considered comprehensively to ensure that the equipment meets process requirements and has long-term stability. Let’s take a detailed look below!

A small box furnace that can be used for tempering (click on the picture to view product details)

1. Matching of core process parameters
Temperature range and accuracy
Requirement analysis: Clarify the temperature range required for workpiece tempering (such as 200 ℃ -1000 ℃), and reserve a margin of 20% -30% to cope with process adjustments.
Accuracy requirement: For high-precision scenarios (such as aerospace parts), equipment with a temperature control accuracy of ± 1 ℃ should be selected, and for ordinary mechanical processing, it can be relaxed to ± 5 ℃.
Case: A certain automobile gear factory experienced uneven hardness due to tempering temperature fluctuations of ± 8 ℃. After replacing the equipment with a temperature control accuracy of ± 2 ℃, the qualification rate increased by 15%.

Furnace size and loading capacity
Size adaptation: Choose the furnace according to the maximum size of the workpiece (length x width x height), and it is recommended to reserve a margin of 50-100mm on one side.
Loading efficiency: Calculate the loading capacity of a single furnace (such as processing 50kg of workpieces per batch) to avoid equipment power waste or overload operation.
Example: A certain mold factory was unable to lay large molds flat due to insufficient furnace height. After switching to customized furnaces, production efficiency increased by 40%.

2. Equipment performance and reliability
Heating elements and insulation materials
Heating element: Resistance wire is suitable for medium and low temperatures (<800 ℃), silicon carbon rod/silicon molybdenum rod is suitable for high temperatures (>1000 ℃).
Thermal insulation material: Full fiber lining saves 30% energy compared to traditional refractory bricks, and increases heating rate by 50%.
Data comparison: After comparison, a certain enterprise found that the annual operating cost of full fiber lining equipment was reduced by about 28000 yuan.

Control System and Security Protection
Temperature control system: PID intelligent controller saves 10% -15% energy compared to traditional instruments, and supports multi-stage programmed heating.
Safety function: Over temperature alarm, leakage protection, pressure monitoring and other devices must be configured to ensure safe operation.

3. Energy efficiency and maintenance costs
Energy consumption and efficiency
Energy efficiency level: Priority should be given to first level energy efficiency equipment, which reduces no-load losses by 40% compared to third level energy efficiency.
Thermal efficiency: The forced convection circulation furnace has a 20% -30% increase in thermal efficiency compared to the natural convection furnace, making it suitable for large-scale production.
Calculation example: A certain enterprise has an annual processing capacity of 100 tons, and after selecting efficient equipment, the annual electricity cost savings are about 50000 yuan.

Maintain convenience
Structural design: The split type furnace door facilitates the replacement of heating elements, and the modular design reduces maintenance difficulty.
Spare parts cost: Prioritize the use of universal accessories (such as standard resistance wires) to avoid downtime risks caused by exclusive supply.
Maintenance cycle: The maintenance cycle for full fiber lining has been extended to 2 years, reducing downtime by 50% compared to traditional lining.

4. Suppliers and after-sales service
Manufacturer Qualifications and Cases
Qualification review: Confirm that the manufacturer has the production qualification for heat treatment equipment.
Industry experience: Prioritize manufacturers with similar customer cases, such as automotive parts, aerospace, and other fields.

Service response and training
Operation training: Ensure that suppliers provide equipment operation, maintenance, and emergency response training.
Contract terms: Clearly define the warranty period (usually 1 year), spare parts supply cycle, and technical support fees.

5. Selection Decision Process
Requirement confirmation: Organize process parameters, production capacity targets, and budget ranges.
Technical exchange: Request manufacturers to provide a proposal, with a focus on comparing temperature uniformity, energy consumption, and maintenance costs.
On site inspection: Visit the manufacturer’s production workshop and user site to verify the actual operating effect of the equipment.

High box laboratory muffle furnace (click on the picture to view product details)

By following the above selection precautions, you can choose a customized tempering furnace that is more suitable for yourself. It is recommended to communicate the parameters with relevant technical personnel before purchasing to ensure that the produced tempering furnace is more suitable for your experiment or production!Click to learn more Muffle Furnaces! Or click on online customer service to learn more about product information!