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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Carbon Dust - Its Short-Term Influence on Potroom Operations
Author(s) Matthias Dechent
On-Site Speaker (Planned) Matthias Dechent
Abstract Scope Carbon dust refers to carbon particles, originating from carbon inputs into the smelting process like anodes, that float on top of the bath, below anodes or suspended in the bath. The phenomenon has a deleterious effect on the specific energy consumption of cells and can lead to anode deformations, hot cells out of the process window and stoppage of cells. Trials were conducted in the TRIMET Hamburg Smelter focusing on the effect of dust at anode changes. The conditions were chosen to be best and worst practice as assessed by a visual carbon dust assessment in the taphole. Contrasting with published literature, there was no relation in the experiments between spike formation and carbon dust in anodes after 8 hours. Anodes set in cells with a high carbon level in the taphole did not behave differently when compared to anodes with a low carbon dust content in the taphole. Samples obtained from the frozen bath layer underneath the anodes showed carbon contents in the range of 0.0315 to 6.29 %.
Proceedings Inclusion? Planned: Light Metals


AP12 Low Energy Technology at ALRO Smelter
Carbon Dust - Its Short-Term Influence on Potroom Operations
Characterisation of Powders-precondition for Plant Engineering
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 Karmøy 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 Søderberg 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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