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.