What are the common problems with rotary tube sintering furnace？

The rotary tube sintering furnace may encounter various common problems during use, which may involve equipment itself, operation process, material handling, and other aspects. The following are some common problems and possible causes of rotary tube sintering furnaces:
1. Equipment malfunction related issues
The instrument indicator light is not on
Possible reasons: unplugged plug, circuit malfunction, blown fuse, etc.
Solution: Check the connection of the plug, confirm if the fuse is intact, and perform circuit maintenance if necessary.
The temperature inside the furnace does not rise
Possible reasons: low set temperature, damaged control circuit, heating element malfunction, etc.
Solution: Adjust the set temperature, check and repair the control circuit, and replace damaged heating elements.
Temperature deviation
Possible reasons: damage to temperature sensors or temperature controllers, deviation between temperature measurement points and layout points, etc.
Solution: Replace the temperature sensor or temperature controller, adjust the position of the temperature measurement point and the layout point.
Main circuit malfunction
Possible manifestation: The instrument output is normal but the OUT indicator light is not flashing.
Solution: Check if the resistance wire is short circuited, if the heating element is controllable, and replace the resistance wire or temperature controller if necessary.
2. Operational process related issues
Improper heating rate
Possible reason: The heating rate is set unreasonably and the physical and chemical properties of the material are not fully considered.
Solution: Adjust the heating rate according to the characteristics of the material to avoid problems caused by being too fast or too slow.
Decreased vacuum degree
Possible reasons: The sealing performance decreases after long-term use, such as aging of heat-resistant silicone rings or loosening of stainless steel flanges.
Solution: Replace the heat-resistant silicone ring or reinstall the stainless steel flange, and if necessary, inspect the vacuum system.
Furnace cracking
Possible reason: The furnace temperature exceeds the rated temperature, and the furnace material cannot withstand the high temperature and cracks.
Solution: Strictly control the furnace temperature within the rated range to avoid overheating during use.
3. Material handling issues
Spray phenomenon
Possible reason: The rapid heating rate caused the material to expand and spray out.
Solution: Adjust the heating rate to ensure that there is not much difference in heating rate between different temperature ranges.
Quartz tube loss of transparency
Possible reason: When using a quartz tube to heat the sample, the high-temperature part of the quartz tube may become opaque (opaque) when the temperature exceeds 1000 ℃.
Solution: Understand and accept that this is an inherent defect of fused quartz tubes, which is a normal phenomenon. If avoidance is necessary, consider using furnace tubes made of other materials.
4. Other precautions
Safety issue: Ensure that there are no flammable or explosive materials around the rotary tube sintering furnace to prevent safety accidents caused by high temperatures. Regularly check whether the electrical connections of the equipment are in good condition, especially whether the connection points of the heating elements are tightened.
Maintenance: Regularly clean the furnace and furnace tubes to keep the equipment clean. Regularly maintain and upkeep the equipment, such as replacing aging seals and inspecting heating elements.
In summary, the rotary tube sintering furnace may encounter various problems during use, and operators need to have rich experience and professional knowledge to cope with them. At the same time, strict adherence to operating procedures and safety regulations is also key to ensuring the normal operation of equipment and extending its service life.