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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Latest Developments in GTC Design to Reduce Fluoride Emissions
Author(s) Philippe Martineau, Youssef Joumani, Bassam Hureiki, Jrmy Neveu, Fabienne Virieux
On-Site Speaker (Planned) Philippe Martineau
Abstract Scope The emission of fluorine from aluminium smelters to the atmosphere remains a serious environmental concern and requires special considerations during GTC engineering phase for greenfield or creeping projects. In order to achieve the lowest emission of fluorides, Fives has developed several innovations and demonstrated their benefits at industrial scale: • A dedicated flow-control valve installed at pots outlet ducts allowing the adjustment of the pot gas suction with cell operation requirements, • An alumina recirculation gas scrubber named OZEOS designed to allow adjustments of the alumina residence time optimizing the HF adsorption, • The Fives Solios patented process of alumina Cascade with specific Air Gravity Conveyor ensuring an improved scrubbing efficiency in very warm areas, • A digital solution combining multi-locations measurements of hydrogen fluoride (potroom & stack). The current paper describes the R&D works, the industrial implementation and the industrial results obtained thanks to these innovations.
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 Karmy 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 Sderberg 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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