How to Detect the Inner Lining of High Temperature Rotary Furnace

The service life of the high-temperature rotary furnace lining is important for enterprises that need continuous large-scale production. Its long service time can directly save a lot of production costs, so how to detect it?

1. Resistance method

It is recommended to embed resistance elements in the rotary furnace lining, with the front end of the sensor aligned with the inner surface of the lining, and connected to the measurement system through leads. The resistance value of the resistance element and its length Related, as the resistance element and furnace lining lose synchronously, the resistance will change. By measuring the electrical signal output by the corresponding measuring instrument, the remaining thickness of the furnace lining can be measured online

2. Capacitance method

The capacitance method is similar to the resistance method. A coaxial circular capacitor sensor is buried in the furnace lining, and the capacitance value corresponds to its length. The thickness of the high-temperature rotary kiln masonry can be determined by measuring the capacitance value.

3. Heat flux detection method

According to thermodynamics, temperature difference, thermal conductivity, and furnace wall thickness determine the heat flux intensity. For blast furnace lining, the thermal conductivity is fixed, and the furnace wall thickness can be obtained from the temperature difference and heat flux intensity.

. The heat flow detection sensor is installed in the lower temperature part of the furnace lining. The heat flow intensity is calculated by the temperature difference between the cooling wall water in the furnace hearth, and then combined with the temperature value measured by the temperature thermocouple inside the brick lining, the thickness of the furnace wall is calculated

4. Stress Wave Method

When stress waves propagate in the medium, if they encounter interface discontinuities such as holes and cracks, reflection, refraction, scattering, and mode conversion will occur. The characteristics of stress waves can be used to determine the thickness of the cooling wall material.