铝熔盐电解过程阳极电流非接触式测试方法  

Non-contacting measurement of individual anode current of alumina melts electrolysis

作　　者：董英[1] 周孑民[1] 李茂[1] 周益文[1,2] 詹水清[1] 杨建红 

机构地区：[1]中南大学能源科学与工程学院,长沙410083 [2]中国铝业郑州研究院,郑州450041

出　　处：《中国有色金属学报》2013年第8期2302-2308,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50876116,50974127);中南大学中央高校基本科研业务费专项资金项目(2013zzts038)

摘　　要：针对铝电解槽电磁场的基本原理，提出一种阳极电流非接触式测试方法即多传感器测试方法。该方法是在每个阳极导杆附近，布置多个测试磁场的传感器，通过调节传感器的组合方式，得到测试点准确的磁场，进而反推得到各阳极导杆的电流分布。建立了铝电解槽的骨架模型，对多传感器测试方法进行验证并优化。结果表明：采用3个传感器的布置方案，阳极电流的测试误差减小，误差分布范围为0.35%~0.90%；在传感器1、2的间距为13 mm，传感器1、4的间距为5 mm的特定布置方案中，阳极电流的测试误差达到最小值，平均误差不超过±0.3%；并且该方法具有安装简单、操作方便、精度高以及可实现在线连续测量等特点。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.

关 键 词：铝电解槽 阳极电流 非接触式测试 磁场 

分 类 号：TF821[冶金工程—有色金属冶金]