How to detect the lining thickness of a 高溫電爐?

1.電容法

電容法類似於電阻法。 爐襯內部嵌入同軸圓形電容傳感器，其電容值與其長度相對應。 高爐砌體的厚度可以通過測量電容值來確定。

2. Stress wave method

The stress wave signal is very sensitive to structural defects. When the stress wave propagates in the medium, such as holes, cracks and other interface discontinuities, reflection, refraction, scattering and mode conversion will occur. The thickness of the stave material can be determined.

3.電阻法

The resistance element is embedded inside the furnace lining, the front of the sensor is aligned with the inner surface of the furnace lining, and it is connected to the measurement system through a lead wire. The resistance value of the resistance element is related to its length. As the resistance element and the furnace lining lose synchronously, the resistance will change. Use the corresponding measurement The meter measures the electrical signal output by the component, and then the remaining thickness of the furnace lining can be measured online.

4、熱流檢測法

根據熱力學，溫差、導熱係數和爐壁厚度決定了熱流強度。 對於高爐爐襯，導熱係數是固定的，從溫差和熱流強度可以得到爐壁厚度。

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

5.超聲波法

The thickness measurement is carried out at the point where the ultrasound propagates in the solid medium. At a constant temperature, the ultrasound is incident on the furnace lining and enters the furnace. The propagation time of the incident and reflection of the ultrasound in the furnace lining is used to obtain the residual thickness of the furnace lining.

6、多頭熱電偶法

Several thermocouples of different lengths are installed in a protective sleeve, and then they are installed in the brick lining that needs to be inspected, and the erosion of the masonry can be inferred by measuring the temperature change of each thermocouple. When the temperature of each point and the temperature gradient between each point are basically stable, when the brick lining is gradually eroded to a certain part, the galvanic couple in that part will be destroyed, and the temperature signal will be abnormal.

7.模型推理方法

它以熱電偶為檢測元件，應用熱力學等理論建立爐膛和爐底溫度現場的數學模型，通過軟件編程和數值分析計算出鐵水凝固線和碳磚侵蝕線的大致位置。