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Main Technical Parameters
Parameter | Typical Range |
Furnace Type | DC Submerged Arc Furnace |
Furnace Capacity | 3 – 120 MVA |
Annual Production Capacity | 5,000 – 300,000 t/year |
Furnace Shell Internal Diameter | 2.5 – 14.0 m |
Furnace Hearth Depth | 1.5 – 6.0 m |
Electrode Configuration | 1 Top Electrode + Bottom Electrode |
Electrode Diameter | 400 – 1,200 mm |
Transformer Capacity | 3 – 120 MVA |
Rectifier Capacity | 3 – 120 MW |
Primary Voltage | 10 / 35 / 66 kV |
DC Secondary Voltage | 200 – 1,500 V |
DC Current | 10 – 120 kA |
Rectifier Type | Thyristor / IGBT |
Bottom Electrode Type | Air-Cooled / Water-Cooled |
Electrode Regulation System | Hydraulic Servo |
Burden Type | Ore + Reductant + Flux |
Raw Materials | Chromite, Nickel Ore, Titanium Slag Feed, Copper Slag, Metallurgical Residues |
Operating Temperature | 1,400 – 1,800 ℃ |
Cooling Water Flow Rate | 30 – 600 m³/h |
Cooling Water Pressure | 0.3 – 0.8 MPa |
Specific Energy Consumption | Process Dependent |
Off-Gas Temperature | 300 – 1,200 ℃ |
Process Control | PLC / SCADA |
Environmental System | Fully Closed Furnace Available |
Typical Furnace Sizes
Transformer Capacity | Shell Diameter |
3 MVA | 2.5 – 3.0 m |
6 MVA | 3.5 – 4.0 m |
12 MVA | 4.5 – 5.5 m |
24 MVA | 6.0 – 7.5 m |
48 MVA | 8.0 – 10.0 m |
72 MVA | 10.0 – 12.0 m |
120 MVA | 12.0 – 14.0 m |

Typical Products
· Ferrochrome (FeCr)
· Ferronickel (FeNi)
· Titanium Slag
· Copper Matte
· Crude Copper
· Nickel Matte
· Recovered Metals
· Recycling Products
Scope of Supply
Mechanical Equipment
· Furnace Shell
· Furnace Roof
· Electrode Column
· Bottom Electrode System
· Furnace Tilting System
· Tapping System
Electrical Equipment
· Furnace Transformer
· Rectifier Transformer
· Rectifier Unit
· DC Short Network
· Copper Busbars
· Electrode Regulation System
· PLC & SCADA System
Auxiliary Systems
· Water Cooling System
· Fume Extraction System
· Hydraulic System
· Spare Parts Package
Key Advantages of DC SAF Technology
✓ Lower Electrode Consumption
✓ Higher Energy Efficiency
✓ Improved Metal Recovery
✓ Stable Arc Operation
✓ Reduced Network Flicker
✓ Lower Operating Cost
✓ Better Process Control
✓ Suitable for Large-Scale Smelting Operations
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