The furnace lining of a sintering furnace is a crucial part. The quality and thickness of the lining significantly affect the performance and lifespan of an electric furnace. The lining is made of high-temperature-resistant ceramic materials and is used for refining metals. Its service life directly determines the overall service life of the sintering furnace.
There are several methods to measure the thickness of a sintering furnace lining:
- Stress Wave Method
- Stress wave signals are highly sensitive to structural defects.
- When stress waves propagate through a medium, they are reflected, refracted, scattered, or converted in the presence of cavities, cracks, or discontinuities.
- By analyzing the characteristics of the stress waves, the thickness of the cooling wall material can be determined.
- Capacitance Method
- Similar to the resistance method, this method embeds a coaxial circular capacitor sensor inside the lining.
- The capacitance value corresponds to the sensor length.
- By measuring the capacitance, the thickness of the furnace lining can be determined.
- This method provides preliminary data on the basic properties and performance of the lining and a general understanding of the furnace’s working condition.
- Resistance Method
- Electrical resistance elements are embedded inside the lining, with the sensor front aligned with the inner surface of the lining.
- The resistance value correlates with the sensor length.
- As the resistance element wears along with the lining, the resistance changes.
- Using corresponding measuring instruments, the electrical signal output from the element can be measured, allowing online monitoring of the remaining lining thickness.