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.
