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US 2012/0246923 A1Published application
Process for changing a spent anode and support and system for the temporary storage of such a spent anode
AssigneeRio Tinto Alcan International Limited
InventorsMaxime Faure, Christian Cloue, John Macleod
Life of this patent
Estimating the term…
Abstract
The process involves pouring a smothering powder onto a spent anode placed on a support to cover it, with the aim of limiting fluorinated gas emission by the anode. The support may include a temporary tank, pre-filled with powder and provided with an opening for discharging the powder towards the anode on the support.
Claims20
Process for changing a spent anode from an aluminum electrolysis cell including at least one anode plunged into an electrolysis bath and a bath cover covering the anode and the liquid bath, characterized in that the process includes stages consisting of:
- removing a spent anode, to which pieces of bath cover are attached, from the electrolysis bath;
- placing said spent anode on a support;
- pouring a smothering powder onto said spent anode placed on the support to cover said spent anode with the aim in particular of limiting fluorinated gas emission.
Dependencies are inferred from the claim text.