Characterization of High Phosphorus Gray Iron for the Stub- Anode Connection in the Aluminium Reduction Cells

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Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Nofal"> Adel Nofal</a>, <a href="https://publications.waset.org/abstracts/search?q=Amr%20Kandil"> Amr Kandil</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Agour"> Mahmoud Agour </a> </p> <p class="card-text"><strong>Abstract:</strong></p> High phosphorus gray iron (HPGI) is used to connect the steel stub of an anode rod to a prebaked anode carbon block in the aluminium reduction cells. In this paper, a complete characterization for HPGI was done, includes studying the chemical composition of the HPGI collar, anodic voltage drop, collar temperature over 30 days anode life cycle, microstructure and mechanical properties. During anode life cycle, the carbon content in HPGI was lowed from 3.73 to 3.38%, and different changes in the anodic voltage drop at the stub- collar-anode connection were recorded. The collar temperature increases over the anode life cycle and reaches to 850掳C in four weeks after anode changing. Significant changes in the HPGI microstructure were observed after 3 and 30 days from the anode changing. To simulate the actual operating conditions in the steel stub/collar/carbon anode connection, a bench-scale experimental set-up was designed and used for electrical resistance and resistivity respectively. The results showed the current HPGI properties needed to modify or producing new alloys with excellent electrical and mechanical properties. The steel stub and HPGI thermal expansion were measured and studied. Considerable permanent expansion was observed for the HPGI collar after the completion of the heating-cooling cycle. <iframe src="https://publications.waset.org/abstracts/11906.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high%20phosphorus%20gray%20iron%20%28HPGI%29" title="high phosphorus gray iron (HPGI)">high phosphorus gray iron (HPGI)</a>, <a href="https://publications.waset.org/abstracts/search?q=aluminium%20reduction%20cells" title=" aluminium reduction cells"> aluminium reduction cells</a>, <a href="https://publications.waset.org/abstracts/search?q=anodic%20voltage%20drop" title=" anodic voltage drop"> anodic voltage drop</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20and%20electrical%20properties" title=" mechanical and electrical properties"> mechanical and electrical properties</a> </p> <a href="https://publications.waset.org/abstracts/11906/characterization-of-high-phosphorus-gray-iron-for-the-stub-anode-connection-in-the-aluminium-reduction-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11906.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">461</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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Characterization of High Phosphorus Gray Iron for the Stub- Anode Connection in the Aluminium Reduction Cells