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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Instant Monitoring of Aluminum Chemistry in Cells Using a Portable Liquid Metal Analyzer
Author(s) Sveinn Hinrik Gudmundsson, Birna Bj÷rnsdˇttir, Kristjan Leosson
On-Site Speaker (Planned) Kristjan Leosson
Abstract Scope A portable analyzer for monitoring the aluminum chemistry in production cells is presented. With the portable battery-powered device, trace element concentration analysis can be obtained within 45 seconds of manually extracting a liquid metal sample from the cell. The device uses laser-induced breakdown spectroscopy (LIBS) to directly analyze the composition of the liquid metal, down to concentrations of approx. 10 ppm for a range of elements. We compare the performance of the portable analyzer with conventional off-line laboratory analysis of cast process samples. In addition to the significant time savings and reduced chance of human error, we show that direct analysis in the liquid metal is particularly advantageous in the case of trace elements that display significant segregation upon solidification, such as silicon.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Process Technology, Other


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