50t Ladle Refining Furnace

1. Main Technical Parameter
Ladle rated capacity       50T
Free board         500mm (for 50 tons molten steel)
Ladle car travel speed      3-20m/min
Ladle car driving method      Mechanical, VVVF
Ladle car position accuracy     ±10mm
Roof construction       Water cooled ,tubular
Roof lifting distance       400mm
Electrode diameter       Ф350mm
Pitch circle diameter       Ф700mm
Electrode lifting distance      2600mm 
Electrode travel speed      5m/min(up, automatic)
4m/min(down,automatic
Temperature rising rate      ≥4℃ (after heat balance)
Transformer capacity       9MVA+20%
Primary voltage        20KV, 3 P, 50Hz
Secondary voltage       260-240-160V
Secondary current       24,057A
Number of taps and voltage steps    9
Cooling mode        OFWF
Short net Impedance       ≤2.6mΩ
Three phase unbalance      ≤5％
Hydraulic pressure       12MPa
Hydraulic medium       Water-glycol
Cooling water pressure      0.5Mpa (for roof cooling)
                                       0.3Mpa(for the other)
Inlet water temperature      ≤35℃
Outlet water temperature      ≤55℃
Total water consumption      280 m3/h
Compressed air pressure      0.4-0.6Mpa
Compressed air flow rate      120L/min
Argon gas pressure       0.8Mpa (max 1.6MPa)
Argon flow rate        50 - 300L/min(max)
2. Scope of Supply
SN Item Qty Remark
1 Ladle 0 Buyer’s scope
2 Ladle car 1 VVVF driven
3 Water cooled roof 1 Tubular, water cooled
4 Roof lifting mechanism 1 Hydraulic driven
5 Guide rollers & frame 1 
6 Electrode lifting mechanism 1 C/w electrode arm
7 Cooling water distributor 1 
8 Manual temp. measuring & sampling device 1 
9 Lubrication device 1 
10 Compressed air valve stand 1 
11 Argon valve stand 1 
12 Hydraulic system 1 Proportional valve & pump make: Parker
13 Short network 1 T2 copper (Cu: 99.9%)
14 9MVA furnace transformer c/w oil/water cooler 1 Baowei
15 H.V. switchboard (KYN28-24kV) 1 
16 L.V. power & control panels 1 GGD type
17 PLC & HMI station 1 Siemens S7-200 smart
Advantech computer
18 Electrodes connection device 1 
 
3. Supplied by the Buyer:
3.1 Installation and installation materials, hydraulic medium, lubrication medium and cleaning medium, graphite electrodes, furnace refractory lining;
3.2 Civil works and design (Seller provides furnace foundation drawings and civil work requirements), embedded furnace foundation parts;
3.3 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.
4. Validity of offer: 60 days;
5. Delivery: 5 month after the Seller receiving down payment.