Division BAT 65
United Kingdom
In order to prevent or collect diffuse emissions from electrolytic cells in primary aluminium production using prebaked anodes, BAT is to use a combination of the techniques given below.
| Technique | |
|---|---|
| a | Automatic multiple point feeding of alumina |
| b | Complete hood coverage of the cell and adequate off-gas extraction rates (to lead the off-gas to the treatment in BAT 67) taking into account fluoride generation from bath and carbon anode consumption |
| c | Boosted suction system connected to the abatement techniques listed in BAT 67 |
| d | Minimisation of the time for changing anodes and other activities that require cell hoods to be removed |
| e | Efficient process control system avoiding process deviations that might otherwise lead to increased cell evolution and emissions |
| f | Use of a programmed system for cell operations and maintenance |
| g | Use of established efficient cleaning methods in the rodding plant to recover fluorides and carbon |
| h | Storage of removed anodes in a compartment near the cell, connected to the treatment in BAT 67, or storage of the butts in confined boxes |