(1. 中南大學(xué) 能源科學(xué)與工程學(xué)院，長沙 410083；
2. 中國鋁業(yè) 鄭州研究院，鄭州 450041)
摘 要: 針對鋁電解槽電磁場的基本原理，提出一種陽極電流非接觸式測試方法即多傳感器測試方法。該方法是在每個陽極導(dǎo)桿附近，布置多個測試磁場的傳感器，通過調(diào)節(jié)傳感器的組合方式，得到測試點準(zhǔn)確的磁場，進(jìn)而反推得到各陽極導(dǎo)桿的電流分布。建立了鋁電解槽的骨架模型，對多傳感器測試方法進(jìn)行驗證并優(yōu)化。結(jié)果表明：采用3個傳感器的布置方案，陽極電流的測試誤差減小，誤差分布范圍為0.35%~0.90%；在傳感器1、2的間距為13 mm，傳感器1、4的間距為5 mm的特定布置方案中，陽極電流的測試誤差達(dá)到最小值，平均誤差不超過±0.3%；并且該方法具有安裝簡單、操作方便、精度高以及可實現(xiàn)在線連續(xù)測量等特點。
關(guān)鍵字: 鋁電解槽；陽極電流；非接觸式測試；磁場
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. Zhengzhou Light Metals Research Institute of CHALCO, Zhengzhou 450041, China）
Abstract:Based on the principle of electromagnetic field in aluminum reduction cell, a new non-contacting measurement of individual anode current, i.e., multi-sensor method, was put forward, which was established by placing many magnetic field sensors near each anode rod to achieve the accurate individual anode current by means of adjusting the combination mode of these sensors. Thereby, the individual anode current or anode current distribution could be obtained from the measured magnetic field values. In addition, the skeleton structure model of aluminum reduction cell was also established, which was used for verification and optimization of the method. The results show that the relative errors of the combination mode of three sensors are reduced effectively and distribute between 0.35% and 0.90%. The relative errors of the combination mode of the 13 mm spacing between sensor 1 and sensor 2 and the 5 mm spacing between sensor 1 and sensor 4 are reduced significantly and evaluated to be within ±0.3%. The test method has characteristics of simple structure, easy operation, high precision and online continuous measurement.
Key words: aluminum reduction cell; anode current; non-contacting measurement; magnetic field
