133,000 ton/year Primary Aluminum, 270 Reynolds P19 Pot cells (180 KA, 3 Plotlines) with 150,000 ton/year (60,000 pieces) anode plant

Raw Materials: Alumina - 255,000 tons, Pet coke - 47000 tons, Pitch - 10,000 tons, Alloying metal - 3800 tons, Scrap - 83,000 tons

Reason for closure: Power contract expired in Dec 2005.

Quality Certification: ISO9001:2000

Potlines Key Data and Performance (August 2005)


No. of pots installed: 270.

 

  •   No. of potlines: 2 (180 and 90 pots + negative return bus).
  •   Type of pot: originally Reynolds P 19 modified with side risers, point feeders and automized AlF3-feeding
  •   Amperage: 180 kA, test section (15 pots) : 184 kA
  •   Production capacity: 1.362 kg/day at 180 kA
  •   Specific DC-consumption: 14 kWh/kg Al
  •   Anodes: 18 anodes per pot, 1.485 mm x 793 mm x 680 mm
  •   Net consumption: 405 kgC/kg Al
  •   Gross consumption: 550 kgC/kg Al
  •   Pot service life: 2.500 days
  •   Lining: Alumina insulation (100 % of pots), SiC side walls (100 % of pots), diffusion barrier ( 70 % of pots), cathode with 30 % graphite ( 75 % of pots), cathode with 100 % graphite ( 25 % of pots).
  •   Pot tending machines: 7 originally ECL, tool frame modified by NKM, radio controlled operation
  •   Process control: 18 PLC Siemens U 155 (for 15 pots each), 270 PLC Siemens U 100 for break and feed, Host: HP 9000
  •   Gas cleaning: 4 dry scrubbing plants (ALSTOM), 2 for 90 pots each, 2 for 45 pots each, Gas suction per pot: 4.900 Nm3/h modified with recirculation and 2 additional ABART plants with 80.000 Nm3/h each.


Complete Specification on Request

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