75ton Electric Arc Furnace
1. Technical parameter
Nominal tapping capacity 75t
Average tapping capacity 75t
Shell internal diameter Ф5600mm
Electrode traveling system Hydraulic
Method of charging Top (using charging buckets)
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 70°
Electrode diameter Ф550mm
Pitch circle diameter Ф1250mm
Electrode lifting distance 4500mm
Electrode traveling speed 6 / 4m/min (up/down)
Transformer capacity 63MVA+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 consumption 1200 m3/h
Lower shell weight (with lining and hanger) 160t
2. Supply list of EAF-75T
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 connection device 1 set 4 nos.
1.10 Cooling water distributor 1 set
2 Electrical parts
2.1 Transformer 63MVA/20kV c/w hydro-oil cooler 1 set
2.2 20kV high voltage system (GBC) 1 set ABB vacuum breaker
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 equipment 1 set Proportional valve & pump make: Parker
3.2 Compressed air device 1 set
3.3 Lubrication station 1 set
4 Optional parts
4.1 Door carbon – oxygen lance system 1 set With carbon injection
4.2 Wall lance (4 nos.) 1 set With valves stand
Supplied by the Buyer:
1) Installation and installation materials
2) Hydraulic medium, lubrication medium and cleaning medium;
3) Graphite electrodes, Furnace refractory lining;
4) Civil works and design (Seller provides furnace foundation drawings and civil work requirements), embedded furnace foundation parts;
5) Water supply and gas supply main inlet are laid to Seller’s equipment connection point, H.V. incoming line to Seller’s H.V. panel and furnace transformer terminals, L.V. are connect to Seller’s L.V. distribution panel.
