红外热成像技术在铜电解电流分布测量中的应用

The Application of Infrared Thermography in the Current-distribution Measurement of Copper Electrolysis

针对铜电解槽中阴极棒电流值无法实时测量的问题,应用红外热成像技术采集电解槽阴极棒的红外图像。对原始图像进行处理与分析的基础上,获取阴极棒的表面温度值。其次,通过理论分析与数据验证,结合COMSOL仿真软件数据建立了温度与电流之间的函数关系模型,进而求出电流值。对比实测电流值与模型电流值,结果表明:电解槽的总电流误差均在±5%以内,各阴极棒的电流误差基本在±12%以内,仅个别阴极棒电流误差偏大。该方法不仅实现了对阴极棒电流值的在线监测,而且对极间短路故障的检测提供了依据。

Aiming at the problem that current of the cathode bar can＇t be measured in real-time in copper electrolytic tank, we used the technology of infrared thermography to acquire infrared image of the cathode bar. On the basis of process and analysis of the original image, surface temperature values of the cathode bar were obtained. Furthermore, the functional model of temperature-current was established combining with the data of COMSOL simulation software model through theoretical analysis and data validation and we got the current values. With comparison between the measured current and model current, results showed that the total current error of electrolytic tank is all within ± 5%, the current error of every cathode bar is almost within ± 12%, and only exceptional current error is relatively large. This method not only realizes the online monitoring of the cathode current value, and provides the basis for the detection of the short circuit fault.