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Metals 2017, 7(4), 128; doi:10.3390/met7040128

A Non-Destructive Technique for the On-Line Quality Control of Green and Baked Anodes †

University Research Centre on Aluminum (CURAL)—Aluminum Research Centre (REGAL), University of Quebec at Chicoutimi, Chicoutimi, QC G7H 2B1, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Houshang Alamdari
Received: 13 February 2017 / Revised: 27 March 2017 / Accepted: 1 April 2017 / Published: 6 April 2017
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Abstract

Carbon anodes play an important role in the electrolytic production of aluminum. They have a significant economic and environmental impact. Carbon anodes are made of dry aggregates, composed of petroleum coke, recycled rejects, and butts, bound by coal tar pitch. Due to several factors, defects (cracks/pores) appear in anodes during the fabrication process, affecting their quality. It is thus essential to control the quality of anodes before their use in the electrolysis cell. Current practice for the quality evaluation (visual inspection, core analysis) gives limited information. As an alternative to this practice, electrical resistivity measurements can be used. Electrical resistivity is one of the key indicators for anode quality and its homogeneity. A simple and non-destructive method has been developed for the specific electrical resistivity measurement of anodes (SERMA) for on-line control of anode quality. Various tests have been carried out at both lab scale and industrial scale. In this study, the electrical resistivity distributions in the lab-scale anodes were measured and compared with those of the tomography analysis. The method is able to detect defective anodes even before the baking process. View Full-Text
Keywords: carbon anodes; quality control; non-destructive method; electrical resistivity carbon anodes; quality control; non-destructive method; electrical resistivity
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MDPI and ACS Style

Benzaoui, A.; Kocaefe, D.; Bhattacharyay, D.; Kocaefe, Y. A Non-Destructive Technique for the On-Line Quality Control of Green and Baked Anodes †. Metals 2017, 7, 128.

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