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| Measurement of Magnetic Fields of Individual Anode Current Based on Magnetic Shielding Ring in Aluminum Reduction |
| Received:March 11, 2015 Revised:March 16, 2015 |
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| DOI：doi：10.3969/j.issn.1007-7545.2015.10.012 |
| KeyWord:anode current; aluminum electrolysis; Hall sensor; magnetic shielding; experimental verification |
| Author | Institution |
| ZHAND Zhi-fang |
北方工业大学电气与控制工程学院 |
| ZHANG Yu |
北方工业大学电气与控制工程学院 |
| ZHAO Ren-tao |
北方工业大学电气与控制工程学院 |
| LI Huan-de |
北京科技大学自动化学院 |
| TIE Jun |
北方工业大学电气与控制工程学院 |
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| Abstract: |
| Online monitoring of individual anode rod current of aluminum reduction was achieved by installing three Hall sensors arranged at an angle of 45 degrees with anode rod arrangement adopting non-contacting measurement scheme. On this basis, magnetic shielding ring was applied to shield interference magnetic field to improve current measurement accuracy of individual anode rod, and mathematical expressions were provided. Comparison between measuring current derived from optical transformer and that from sensors shows that current measurement error of anode rod is almost within ±3% and the maximum error is ±4.5%. |
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