172 side-by-side pots, HAL230, operated at 230 kA
• 30 anodes - 1410x700x555 mm
• 3 stubs per anode with collars for anode stub protection
• Point feeding of alumina and AlF3
• Forced anode gas suction for reduced fluoride emissions
• Two rows of pots in one potroom
• Superstructure with improved hooding and suction
• Strong welded potshell
• Graphitic cathode blocks
• HAL2000 pot control
• Noell PTMs and anode bridge raising equipment
• Alesa Dense Phase alumina distribution
• Two Procedair gas treatment centers
• Tapping vehicles from Techmo
In order to increase the amperage to 250 kA, experiences fromHydro Aluminium [3,4 and 7] were used in design and operation of 10 booster pots. Other companies have reported similar improvements to increase amperage [2 and 8].
Some anode improvements for increased amperage wereperformed:
• Four anode stubs per anode, unchanged stub size
• Increased anode size, 1510x710x585 mm
• Plates added to the anode beam for longer anodes
• Adjustment of side panels (new anode stem position)
• Slotted anodes were introduced from 2005
• Anode size was later increased further
Only some small investments were necessary in the anode plant todo the anode improvements.
With the bigger anodes it was possible to have 30 days anode cycle. One anode was changed daily for each pot. This was important for the operational stability of the pots.
The cathode lining was also improved, and the following changes were made during relining:
• SiC slabs in the side lining
• Graphitized cathode blocks
• Reduced collector bar height
阳极尺寸比较宽1510x710x585 mm，高度也比国内的高，换极周期30天电流效率95啊，很厉害欢
