Reducing GHG emissions has been made possible thanks to the modernization of RUSALs enterprises: implementation of the alumina point feeder which reduces the frequency of the anode effect
, improvements of the reduction technology and actions taken to improve the energy efficiency of production.
6] during anode effect was undertaken and reported upon in a paper by A Oygard et al.
These are: acceptable alumina dissolution, satisfactory mixing to avoid concentration gradients and a satisfactory rate of alumina increase after anode effect.
In industrial application, when compared to Li bath addition, it was found that the salt containing anode is better wetted by the cryolite-alumina bath, has higher critical current density to inhibit the anode effect, and lower anodic overvoltage as the lithium salt can catalyse the carbon-oxygen reactions.
A Parameter Study of the Formation of C-F Gases Anode Effect in Aluminium Reduction Cells.
In the aluminium industry, reported PFC emissions are known to be associated with momentary process imbalances known as Anode Effects.
We believe our new research is the first of its kind as it aims to tackle emissions from minute changes rather than just reducing Anode Effects that we can all detect today.
A programme has been initiated to facilitate stricter control over anode effects
and thereby reduce PFC emissions.
In recent years, this has included introducing new preventative maintenance procedures; alternative anode sizes; and new controls to anticipate and prevent anode effects
The reduced use of fossil fuel has obvious resource and environmental conservation benefits; while significantly fewer anode effects
compared to lower amperage technologies also contribute to lower perfluorocarbon emissions.
In addition to boosting production capacity, the new technology reduces emissions of perfluorocarbons, a greenhouse gas generated in the aluminium smelting process from anode effects
, by 96%.
Perfluorocarbon (PFC) gases are greenhouse gases generated during anode effects
in the potrooms.