ELKEM ÍSLAND – Grundartangi
SCOPE OF VERKÍS SERVICES
TECHNICAL INFORMATION
- Total power usage
about 150 MW -
Main power transformer:
1x 100 MVA, 3 ph 220/33 kV
1x 68.5 MVA, 3 ph 220/33 kV -
Furnace transformers:
3 x 20 MVA, for furnace I
3 x 20 MVA, for furnace II
3 x 28 MVA, for furnace III
All. 1 ph 33/0.2-0.345 kV. -
Power transformer:
3 x 10 MVA, 3 ph 33/6.6 kV -
Aux. Power transformers:
8 x 1.6 MVA, 3 phase 6.6/0.4 kV -
Capacitor banks: 33 kV
2 x 10 MVAr and 2 x 20 MVAr 8.1 MVAr, 16.2 MVAr, 32.6 MVAr
2 x 12 MVAr -
Outdoor switchyard 220kV:
Incoming field, 2 x outgoing feeders, overhead bus bar -
Power cables 220 kV:
1x3x400mm2, ca. 400m -
Indoor switchgear 33 kV:
Air isolated, 8 OM-CB and 4 disconnectors for furnace I&II
SF6 isolated, 6 vacuum CB and two disconnectors for furnace III -
Indoor switchgear 6,6 kV:
Air isolated cubicles with 16 OM-CB for furnace I&II
Nitrogen isolated cubicles with 8 vacuum CB for furnace III -
Emergency generator:
2 x 630 kVA, 400 V and
800 kVA, 400 V
Projects for Elkem factory at Grundartangi:
- Furnaces I and II: Design criteria for the HV, MV and LV system. Programming part of the PLC control system in auxiliary systems. CPM planning and electrical site engineer.
- Furnace III: Project management team member, project planning and cost estimate, pre-design, design criteria, tender documents for total electric-, control-, compressed air-, sprinkler- and cooling systems.
- Assisting in completing the contracts for the above mentioned systems.
- Management of the electrical and control contract, design and process surveillance and assisting in final closure of the contracts.
- Follow-up of factory and functional tests, start-up and acceptance tests for all above mentioned projects.
- Consultancy on miscellaneous electrical, mechanical and environ-mental projects ever since 1979. Design and supervision of new capacitor banks, design and supervision of the renovation of MV circuit breakers, different control system design, e.g. filters-, raw materials- and furnace control systems.
DESCRIPTION
In 1977 Icelandic Alloys Ltd. (now Elkem Iceland) started the construction of a FeSi factory at Grundartangi. Initially the first phase design criteria assumed a factory equipped with only one furnace plus the necessary infrastructure, soon to be expanded by a second furnace. Both furnaces were producing at full capacity in 1980. The third furnace was added in phase two commencing in 1995 and furnace III was in full production by 1999.
The electrical furnace load of the factory is about 120 MV, annual FeSi production is 120 thousand metric tons, and the energy consumption is around 945 GWh per year.
General information
Elkem Iceland (former Icelandic Alloys Ltd.) was established in 1975 by the Icelandic government in cooperation with Union Carbide. In 1976 Elkem AS acquired Union Carbide‘s stake and then became the only shareholder in 2003. The original plan was to build 4 furnaces, but during construction it was decided to build only 2 furnaces in the first phase. The construction started in 1977 and the first two furnaces came on stream in 1979 and 1980. A third one was put into operation in 1999. In 2006 it was decided to start production of MgFeSi (nodularizers for iron foundries) at Elkem and the new MgFeSi plant began production in 2008.