40t Electric Arc Furnace

1. Technical parameter
1.1 Furnace capacity
  Nominal tapping capacity     40t
  Average tapping capacity     50t (Hot heel: 6-8t)
  Tap to tap time  (tap 50t liquid steel)   70 mins. (100% scrap, 2 times top charging)
  Method of charging      Top (using charging buckets and hopper)
  Method of tapping       EBT
1.2 Furnace body
  Shell internal diameter      Ф4800mm
  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°
  Furnace door size       1000mm×900mm (W×H)
1.3 Heavy current system
  Electrode diameter       Ф500mm (UHP)
  Pitch circle diameter      Ф1200mm
  Electrode lifting distance     3100mm
  Electrode traveling speed     9 / 6m/min (up/down, hydraulic driven)
  Short net Impedance      ≤0.65+j3mΩ
  Three phase unbalance      ≤5％
1.4 Furnace transformer & series reactor
  Transformer capacity      32MVA+20% (long term)
  Primary voltage       20kV, 3P, 50Hz
  Secondary voltage       650-500-350V (15 taps, ABB tap changer)
  Secondary current       36950A
  Cooling mode        OFWF
  Reactor capacity       6MVar
  Reactor tap        100%, 70%, 50%, 25%, 0%
1.5 Hydraulic system
  Hydraulic working pressure     12MPa
  Hydraulic medium       Water-glycol (Buyer’s scope)
1.6 Cooling water
  Water pressure        0.4MPa
  Inlet water temperature      ≤35℃
  Outlet water temperature     ≤55℃
  Total water circulation flow     600 t/h
  Emergency water       300 t (for 30mins. @ 0.25MPa)
  Water quality        Industrial clean water
1.7 Lance & carbon injection system
  Oxygen working pressure     0.8-1.0MPa
  Oxygen flow rate       2900Nm3/h (max.)
  Oxygen nozzle speed      2 Mach
  CNG working pressure      0.4MPa
  CNG flow rate        800Nm3/h (max.)
  Compressed air working pressure   0.8MPa
  Compressed air consumption    600Nm3/h (max.)
  Carbon powder consumption    20-30kg/min.
1.8 Others
  L.V. power installation capacity    100kW
  Furnace shell weight      105t (with refractory lining)
2. Supply list & break down price 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 
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 Electrode nippling station 1 set 
1.9 Cooling water distributor 1 set 
2 Electrical parts  
2.1 Transformer 32MVA/20kV c/w cooler 1 set ABB tap changer
2.2 Reactor 6MVar/20kV c/w cooler 1 set Changchun sanding
2.2 20kV high voltage system (GBC40.5kV panel) 1 set Schneider VCB
2.3 Short network with water cooled cables 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 manipulator 1 set with hydraulic station
3.5 CNG, oxygen, carbon wall lance (4 pcs.) 1 set with valves stand
3.6 Steel temperature & measuring thermometer 1 set with LED display
4 Others (packing, china trans., customs, etc) 1 
 FOB china port price 

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.
3. Delivery: 6 month after the Seller receiving down payment.