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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title SPL Recycling and Re-Processing
Author(s) Victor Mann, Vitalii Pingin, Aleksey Zherdev, Aleksandr Proshkin, Sergey Pavlov, Yurii Bogdanov, Vladimir Somov
On-Site Speaker (Planned) Yurii Bogdanov
Abstract Scope Aluminum smelters generate a considerable amount of SPL, which results from the chemical and mechanical degradation of carbon, refractory and insulating materials, which are used to isolate a high-temperature and chemically aggressive process of electrolysis. The specific amount of generated SPL is 25-40 kg/t Al, and it depends on the life of the cell, which varies from 5 to 7+ years. Besides considerable expenses for cell relining, SPL has a negative impact on the environment due to fluorine compounds and cyanides, which SPL contains. There are two most evident ways of minimizing the above negative impact from SPL: a decrease in the amount of SPL, and SPL re-processing, including SPL neutralization and the production of sub-products, such as fluorine, carbon and aluminosilicates, which can either be used in-house or sold to third parties. This paper covers RUSAL’s efforts aimed at developing and implementing a technology to recycle and re-process SPL.
Proceedings Inclusion? Planned: Light Metals


Aging of Insulating Linings in Aluminium Electrolysis Cells
Alternative Applications of SPL: Testing Ideas through Experiments and Mathematical Modeling
Application of Multivariate Statistical Process Control with STARprobeTM Measurements in Aluminium Electrolysis Cells
Bauxite Processing via Chloride Route to Produce Chloride Products and Subsequent Electrolysis of Aluminium Chloride to Produce Aluminium Metal
Cathode Wear Based on Autopsy of a Shut down Aluminium Electrolysis Cell
Chemical Stability of Thermal Insulating Materials in Sodium Vapour Environment
Clustering Aluminium Reduction Cells
Co-evolution of Carbon Oxides and Fluorides during the Electrowinning of Aluminium with Molten NaF-AlF3-CaF2-Al2O3 Electrolytes
Detecting, Identifying and Managing Systematic Potline Issues with Generation 3 Process Control
DX+ Ultra – EGA High Productivity, Low Energy Cell Technology
Enabling Efficient Heat Recovery from Aluminium Pot Gas
Fluoride Capture Capacity of SGA: The Interplay between Particle and Pore Size Distribution
Implementation of D18+ Cell Technology at EGA Jebel Ali Smelter
Improving the Understanding of Busbar Design and Cell MHD Performance
Influence of Handling Parameter on Powder Properties
Integrating a New Smelter Supervision HMI in Existing Control Systems at ALBRAS
LES Turbulence Modeling Approach for Molten Aluminium and Electrolyte Flow in Aluminum Electrolysis Cell
Low Energy Consumption Cell Designs Involving Copper Inserts and an Innovative Busbar Network Layout
MHD of Large Scale Liquid Metal Batteries
Minimizing Cathode Voltage Drop by Optimizing Cathode Slot Design
Partial Anode Effect in a Two-Compartment Laboratory Alumina Reduction Cell
Pot Gas Treatment at High Gas Temperatures
Potroom HF Emission Reduction by Anode Inert Tray Technology Performances of ALRO Industrial 1st of Class
Predicting Instability and Current Efficiency of Industrial Cells
Predictive Formula for the Competitive Adsorption of HF and SO2 on Smeltergrade Alumina Used in Dry Scrubbing Applications
Preventive Treatment of Anode Effects Using On-Line Individual Anode Current Monitoring
Reduction in EGA Jebel Ali Potroom GHG Emissions
Retrofit of Damaged Corner Risers by Means of Bolted Connections
Role of Heat Transfer in the Formation of Carbon Oxides in Smelting Cells
Sodium in Aluminium as a Cell Performance Indicator: A Quantitative Framework
SPL Recycling and Re-Processing
Spreading of Alumina and Raft Formation on the Surface of Molten Cryolite
Stability of Chlorides in Cryolitic Electrolyte
Study of Impact of the Anode Slots on the Voltage Fluctuations of Aluminium Electrolysis Cell Using Bubble Layer Simulator
Surviving an Extended Power Outage after a Break Down in the Sub Station
The Successful Implementation of AP40 Technology at Kitimat

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