What are the common problems during the operation of the bell jar furnace？

During the operation of the bell jar furnace, some common problems may be encountered, mainly involving temperature control, atmosphere management, equipment failure, and improper operation. The following is a detailed summary of these issues:
1. Temperature control issues
Abnormal temperature:
Performance: Excessive or insufficient temperature can affect the quality of the sintering process.
Reason: It may be caused by damage to the heating element, temperature sensor malfunction, or control system issues.
Solution: Regularly check the working status of heating elements and temperature sensors to ensure the normal operation of the control system. If any malfunction is found, it should be replaced or repaired in a timely manner.
Poor temperature uniformity:
Performance: Uneven temperature distribution inside the furnace affects product quality.
Reason: Unreasonable layout of heating elements, aging insulation materials, or furnace design issues.
Solution: Optimize the layout of heating elements, replace aging insulation materials, and improve furnace design if necessary.
2. Atmosphere management issues
Abnormal atmosphere:
Performance: The atmosphere inside the furnace does not meet the process requirements, resulting in abnormal chemical reactions during the sintering process.
Reason: Malfunction of the atmosphere control system, gas leakage, or insufficient purity of the atmosphere.
Solution: Regularly check the atmosphere control system and sealing to ensure the purity and stability of the atmosphere. If any problems are found, they should be repaired and the atmosphere parameters adjusted in a timely manner.
Insufficient protective atmosphere:
Performance: Excessive oxygen content in the furnace leads to material oxidation.
Reason: Insufficient supply or leakage of protective atmosphere.
Solution: Increase the supply of protective atmosphere, inspect and repair leakage points.
3. Equipment malfunction issue
Electrical malfunction:
Performance: The device cannot start, stop, or display abnormally.
Reason: Power line malfunction, controller malfunction, or motor damage, etc.
Solution: Check the power circuit and controller status, replace damaged motors or components.
Mechanical malfunction:
Performance: malfunction of the lifting mechanism, inadequate sealing of the furnace door, etc.
Reason: Mechanical components are worn, loose, or damaged.
Solution: Regularly check the wear of mechanical components and replace or tighten loose parts in a timely manner.
4. Improper operation issue
Not operating according to the process requirements:
Performance: The temperature, atmosphere, or time parameters during the sintering process do not meet the process requirements.
Reason: The operator is not familiar with the process requirements or is negligent.
Solution: Strengthen operator training to ensure they are familiar with and strictly comply with process requirements.
Unplanned maintenance and inspection:
Performance: Decreased equipment performance and frequent malfunctions.
Reason: Neglecting regular maintenance and inspection of equipment.
Solution: Develop a regular maintenance and inspection plan for the equipment and strictly implement it.
In summary, common problems during the operation of bell jar furnaces involve multiple aspects such as temperature control, atmosphere management, equipment failure, and improper operation. In order to ensure the stable operation and product quality of the bell jar furnace, operators should be familiar with and strictly follow the operating procedures, strengthen equipment maintenance and inspection, and promptly discover and solve problems.