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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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AP12 Low Energy Technology at ALRO Smelter
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Coupled SPH-DEM to Simulate the Injection of a Powder into a Liquid with Heat Transfer and Phase Change
Dissolution Characteristics and Concentration Measurements of Alumina in Cryolite Melts
Electrochemical Reduction and Dissolution of Aluminium in a Thin-layer Refinery Process
Experience with Lengthy Pot Hibernation at Alcoa Baie-Comeau
Gas Treatment in the GE Pot Integrated ABART Modules (PIA)
Hydro’s New Karm°y Technology Pilot: Start-up and Early Operation
Improvement to Alpsys Instability and Alumina Feeding Control
Individual Anode Current Monitoring during Aluminum Reduction Cell Power Reduction
Influence of Additives on Alumina Dissolution in Superheated Cryolite Melts
Instant Monitoring of Aluminum Chemistry in Cells Using a Portable Liquid Metal Analyzer
Introductory Comments: Aluminum Reduction Technology
Latest Developments in GTC Design to Reduce Fluoride Emissions
Low and High Voltage PFC Slope Coefficient Monitoring during Pot Start-up
Mass Transport by Waves: Bath-metal Interface Deformation, Rafts Collision and Physical Model
Modeling Anode Current Pickup After Setting
New Phase in Upgrade of S°derberg Technology at RUSAL’s Smelters
On Gaseous Emissions during Alumina Feeding
On the Feasibility of Using Low-melting Bath to Accommodate Inert Anodes in Aluminium Electrolysis Cells
Process and Environmental Aspects of Applying Unshaped Carbon Materials for Cell Lining Purposes
Superconductor Busbars – High Benefits for Aluminium Plants

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