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化工学报  2013 

不同进电方式对铝电解槽阳极电流非接触式测量的影响

DOI: 10.3969/j.issn.0438-1157.2013.10.030, PP. 3701-3707

Keywords: 铝电解槽,非接触式测量,阳极电流,多传感器测试方法,磁场

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Abstract:

针对目前铝电解槽阳极电流在线测试方法的不足,基于铝电解槽电磁场的理论,借鉴国外学者通过测试导杆附近的磁场来得到阳极电流的思想,提出了一种阳极电流非接触式测试方法,并着重针对铝电解槽不同的进电方式分析了阳极电流的测量误差,并对误差进行了修正,对测试方案进行了优化,旨在实现阳极电流的实时监测和在线控制。研究结果表明,300kA大面五点进电槽的阳极电流测量误差可以控制在±0.25%之内,而400kA大面六点进电槽、200kA大面四点进电槽的阳极电流测量误差分别达到了±0.8%和±3%;可见不同进电方式对阳极电流的测量误差有较为明显的影响,但最大误差均不超过3%。因此,对于不同进电方式及结构的铝电解槽阳极电流的在线监测,该非接触式测试方法均具有较好的适用性。

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