50t Electric Arc Furnace

1. Technical parameter
  Nominal tapping capacity     50t
  Average tapping capacity     60t
  Shell internal diameter      Ф5000mm
  Electrode traveling system     Hydraulic
  Method of charging      Top (using charging buckets and hopper)
  Method of tapping       EBT
  Side wall construction      Water cooled ,tubular
  Forward tilting angle (steel tapping)   20°
  Backward tilting angle (slag tapping)  12°
  Roof construction       Water-cooled, tubular
  Roof lifting distance      400mm
  Roof rotation angle      65°
  Electrode diameter       Ф500mm
  Pitch circle diameter      Ф1200mm
  Electrode lifting distance     4500mm
  Electrode traveling speed     9 / 6m/min (up/down)
  Transformer capacity      40MVA+20% (long term)
  Primary voltage       20kV, 3P, 50Hz
  Cooling mode        OFWF
  Short net Impedance      ≤0.65+j2.7mΩ
  Three phase unbalance      ≤5％
  Hydraulic pressure       12MPa
  Hydraulic medium       Water-glycol
  Water pressure        0.4MPa
  Inlet water temperature      ≤35℃
  Outlet water temperature     ≤55℃
  Total water circulation flow     700 m3/h
  Emergency water       200 m3 (for 30mins.)
  Furnace shell weight      100t
  Compressed air working pressure   0.8MPa
  Oxygen working pressure     0.8-1.0MPa
  Natural gas working pressure    0.4MPa
2. Supply list
SN Item Qty Remark
1 Mechnical parts  
1.1 Furnace body (upper shell and lower shell) 1 set 
1.2 Tilting mechanism 1 set 
1.3 Water cooled roof and water pipe 1 set Tubular,
1.4 Roof lifting and rotating mechanism 1 set 
1.5 Electrode arms and traveling mechanism 1 set 
1.6 EBT platform 1 set 
1.7 Rotation frame locking device 1 set 
1.8 Feeding hopper(on the roof) 1 set 
1.9 Electrode nippling station 1 set 4 nos.,
1.10 Cooling water distributor 1 set 
2 Electrical parts  
2.1 Transformer 40MVA/20kV c/w hydro-oil cooler 1 set China top make
2.2 20kV high voltage system (GBC40.5kV panel) 1 set Schneidar china VCB
2.3 Short network 1 set 
2.4 Lower voltage system 1 set 
2.5 PLC automation and HMI system 1 set Siemens PLC S7-300
3 Auxiliary items  
3.1 Hydraulic power pack 1 set Proportional valve & pump make: Parker
3.2 Compressed air device 1 set 
3.3 Lubrication station 1 set Xi’an or Qidong

3.4 Water cooled door oxygen lance 1 set with hydraulic station
3.5 CNG, oxygen, carbon wall lance (3 pcs.) 1 set with valves stand
3.6 Steel temperature & measuring thermometer 1 set with LED display
Supplied by the Buyer:
1) Installation and installation materials, Hydraulic medium, lubrication medium and cleaning medium, Graphite electrodes, Furnace refractory lining;
2) Civil works and design (Seller provides furnace foundation drawings and civil work requirements), embedded furnace foundation parts;

3) Water supply and gas supply main inlet are laid to Seller’s equipment connection point, H.V. incoming line is connected to Seller’s H.V. panel and furnace transformer terminals, L.V. line is connected to Seller’s L.V. distribution panel.