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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Cast Shop Technology
Presentation Title Chlorine free degas system for aluminum slab casting and its effect on sheet products
Author(s) Sandrella Samaha, Tao Wang, Patrice Robichaud, Pascal Gauthier, Josee Colbert, Ginny Hammersmith, Peter Evans
On-Site Speaker (Planned) Tao Wang
Abstract Scope The chlorine in-line degasser technology is one of the metal treatment methods utilized in aluminum industry to produce high quality products. However, the chlorine gas used in the system increased the environmental, health and safety (EHS) risks. At Rio Tinto, the chlorine-free salt ACD (Aluminum Compact Degasser) has been implemented to not only mitigate the EHS risks but also improve the product quality. The salt ACD demonstrates better or equivalent metal treatment performance in terms of metal cleanliness, alkali and hydrogen removal compared to the chlorine degasser. The 5xxx and 6xxx alloy products were cast using both degassing systems and subsequently rolled and heat treated for their end uses. In this paper, the metallurgical properties, such as microstructure, strength and ductility, and inclusion populations, were compared between the products produced with regular and salt degassers. The chlorine-free salt ACD meets all the requirements regarding downstream processing and final product attributes.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Environmental Effects, Process Technology

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Aluminium melting process optimization with SmartMelt, a digital tool for real-time operational guidance
Aluminothermic Reduction of Sulfides via Reactive Vacuum Distillation
Aluminum Melt Cleanliness Analysis based on Direct Comparison of Computationally Segmented PoDFA Samples and LiMCA Results
Analytical, numerical and experimental investigations of transient heat conduction in launder during casting process.
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Assessment of a neural network based approach for application as a digital twin in billet DC casting.
Casthouse furnace tending: a new approach thanks to custom robotics
Chlorine free degas system for aluminum slab casting and its effect on sheet products
Continuous chemical analysis of molten aluminum
Control pin refractory reaction in high magnesium aluminium-melts
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Distributed Temperature and Gap Measurements at the Metal-Mold Interface during Aluminum Casting using Optical Fiber Sensors
Effect of flow management on ultrasonic melt processing in a launder upon DC casting
Effect of heat treatment on mechanical properties of Er, Dy and Eu modified A356 Alloy
Effects of Casting Temperature and Iron Content on the Microstructure of Hypoeutectic A380 Aluminum Alloy
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Heat Treatment of Mg-Containing Aluminum Alloys 5182 and 6016 in an Oxidizing Atmosphere with 4 % CO2
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Modeling of structural parameters during the casting of slabs of aluminum alloys 1xxx, 3xxx, 5xxx, 8xxx series at the RUSAL Pilot Casting Center
Modelling of Al-Mg-Cu light cast alloys behaviors via Finite Element methods with correlation of bifilm index and Xray Studies
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Quantitative Assessment of LPDC Process Parameters on Die Temperatures
Short- and long-term aluminum filtration trials with carbon-bonded alumina filters
The Effect of the Holding Time on the Microstructure of Gd-containing AlSi7Mg Alloys
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