1. Furnace working conditions
1.1 Environment
1.1.1 The altitude is less than 1500m;
1.1.2 Environment temperature: -20-45℃;
1.1.3 Monthly average maximum humidity is less than 90% during rainy season;
1.1.4 No electric dust, detonating gas and aggressive gas;
1.1.5 No obvious vibration and shaking.
1.2 Power supply
High tension AC 10KV ± 10%
Low tension AC 415/230V ± 10%
Frequency 50Hz ± 2%
Control voltage AC 230V
Electromagnetic valve DC 24V
3. Main technical parameters
SN Description Unit Data Remark
1 Furnace type AC EAF
2 Nominal capacity T 12
3 Diameter of shell mm Ф4800
4 Furnace transformer
Rated power kVA 6300 Overload 20%
Primary voltage kV 10
Secondary voltage V 312-282-170
Secondary current A 12899
Frequency Hz 50
Cooling mode OFWF
5 Electrode lifting system
Electrode diameter mm 400 NP graphite
Diameter of pit circle mm 1250
Ascending speed m/min 6/9 Auto/man
Descending speed m/min 4.5/6 Auto/man
6 Tapping mode Spout
7 Tilting angle ° 45
Tilting speed º/s 1
8 Hydraulic system
Working pressure MPa 12
Medium 46# Mineral oil
9 Cooling water system
Inlet pressure MPa 0.4
Inlet temperature ℃ ≤35
Outlet temperature ℃ ≤55
Cooling water flow m3/h 150
3. Scope of Supply
SN Item Qty Remark
1 Furnace body 1 set
2 Tilting mechanism 1 set
3 Water-cooled roof and charging hopper 1 set
4 Conductive arms 1 set
5 Electrode lifting mechanism 1 set
6 Cooling water distributor 1 set
7 Hydraulic power pack 1 set Proportional valve make: Parker
8 Short net 1 set
9 L.V. Control system 1 set
10 PLC control system & HMI 1 set Siemens S7-300
11 6300kVA furnace transformer c/w hydro-oil cooler 1 set
12 10kV H.V. switchboard 1 set GG-1A
4. Quotation conditions
4.1 All present and/or future taxes and duties related to the execution of this Contract, income tax levied on the Seller’s personnel, tax on foreign contractor’s business operated in Pakistan in accordance with existing laws, shall be borne by the Buyer;
4.2 The Seller will dispatch engineers(Includes mechanical, electrical, PLC, hydraulic, etc) to supervise furnace installation and commissioning. Round trip air ticket, local traffic transportation and accommodation cost are borne by the Buyer. The Supervision cost is $300USD for 1 person per day;
