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Main Technical Parameters
Parameter | Typical Range |
Furnace Type | DC Electric Arc Furnace |
Furnace Capacity | 5 – 250 t |
Annual Production Capacity | 50,000 – 2,500,000 t/year |
Charging Materials | Scrap, DRI, HBI, Pig Iron, Hot Metal |
Steel Grade | Carbon Steel, Alloy Steel, Stainless Steel, Special Steel |
Furnace Shell Internal Diameter | 3.5 – 10.5 m |
Furnace Shell Height | 2.5 – 6.0 m |
Furnace Shell Design | Fixed / EBT Type |
Furnace Tilting Angle | ±15° – ±45° |
Roof Type | Fully Water-Cooled Roof |
Water-Cooled Panels | Full Water Cooling |
Top Electrode Quantity | 1 Graphite Electrode |
Electrode Diameter | 500 – 1,000 mm |
Bottom Electrode Type | Air-Cooled / Water-Cooled |
Electrode Regulation System | Hydraulic Servo Control |
Electrode Lifting Speed | 4 – 10 m/min |
Furnace Transformer Capacity | 15 – 200 MVA |
Rectifier Transformer Capacity | 15 – 200 MVA |
Transformer Primary Voltage | 35 / 66 / 110 kV |
DC Secondary Voltage | 300 – 1,500 V |
DC Current | 20 – 150 kA |
Rectifier Type | Thyristor / IGBT Rectifier |
Short Network Type | Water-Cooled Copper Bus System |
Power Factor | ≥ 0.90 |
Oxygen Flow Rate | 500 – 10,000 Nm³/h |
Carbon Injection Rate | According to Process Requirement |
Burner Type | Oxy-Fuel Burner |
Burner Quantity | 2 – 8 Sets |
Chemical Energy Input | Up to 45% of Total Energy |
Tap-to-Tap Time | 30 – 65 min |
Productivity | 20 – 200 t/h |
Specific Power Consumption | 300 – 550 kWh/t |
Electrode Consumption | 0.7 – 1.5 kg/t Steel |
Cooling Water Flow Rate | 80 – 600 m³/h |
Cooling Water Pressure | 0.3 – 0.8 MPa |
Cooling Water Temperature Rise | ≤10℃ |
Off-Gas Temperature | 600 – 1,200℃ |
Arc Stability | Excellent |
Network Flicker | Significantly Reduced |
Automation Level | PLC / SCADA / Level 2 |
Environmental Compliance | Available Upon Project Requirements |
Typical Furnace Sizes
Furnace Capacity | Transformer Capacity | DC Current | Shell Diameter | Annual Capacity |
10 t | 15 MVA | 20 – 25 kA | 3.5 – 4.0 m | 60,000 – 100,000 t |
30 t | 25 – 35 MVA | 30 – 40 kA | 4.5 – 5.5 m | 200,000 – 350,000 t |
50 t | 40 – 55 MVA | 40 – 55 kA | 5.5 – 6.5 m | 400,000 – 600,000 t |
80 t | 60 – 80 MVA | 55 – 75 kA | 6.5 – 7.5 m | 700,000 – 1,000,000 t |
120 t | 90 – 120 MVA | 75 – 100 kA | 7.5 – 8.5 m | 1,000,000 – 1,500,000 t |
150 t | 120 – 150 MVA | 100 – 120 kA | 8.5 – 9.5 m | 1,300,000 – 1,800,000 t |
250 t | 150 – 200 MVA | 120 – 150 kA | 9.5 – 10.5 m | 1,800,000 – 2,500,000 t |
Scope of Supply
Mechanical Equipment
· Furnace Shell
· EBT System
· Water-Cooled Roof
· Water-Cooled Panels
· Top Electrode Column
· Electrode Holding System
· Bottom Electrode Assembly
· Furnace Tilting Mechanism
· Hydraulic System
Electrical Equipment
· Furnace Transformer
· Rectifier Transformer
· Rectifier Unit
· High Voltage Switchgear
· DC Short Network
· Water-Cooled Copper Busbars
· Electrode Regulation System
· Harmonic Filter System
· Static VAR Compensation (SVC)
· PLC & SCADA Control System
Process Systems
· Oxygen Lance System
· Carbon Injection System
· Oxy-Fuel Burners
· Automatic Sampling System
· Temperature Measurement System
Auxiliary Systems
· Water Cooling System
· Dust Collection System
· Fume Extraction System
· Compressed Air System
· Spare Parts Package
Key Advantages of DC EAF Technology
✓ Lower Electrode Consumption
✓ Reduced Power Network Disturbance
✓ Improved Arc Stability
✓ Lower Maintenance Costs
✓ Higher Electrical Efficiency
✓ Reduced Electrode Breakage Risk
✓ Lower Flicker and Harmonic Impact
✓ Improved Steel Quality Consistency
✓ Suitable for Ultra-High Power Operation
✓ Reduced Operating Cost per Ton of Steel
Why Starmet
✓ In-house Engineering & Design Team
✓ Transformer & Power Supply System Expertise
✓ Furnace Electrical System Integration Capability
✓ Mechanical & Electrical Turnkey Solutions
✓ Global Project Support
✓ Complete Spare Parts Supply
✓ Installation & Commissioning Assistance
✓ Long-Term Technical Service
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