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Syed Rashid Ahmed ButtShaanxi Chengda Industrial Furnace Co., Ltd. completed the commissioning of electric arc furnace, the workers carefully cooperated with Chengda engineers to learn and operate the equipment, showing the deep friendship and excellent cooperation between the people of China and Pakistan. -
AboubacarAfter more than 1 month of intense production and debugging, 2 sets of heat exchange flue gas settling chamber equipment has been successfully put into operation ~ All the personnel involved in the project have worked hard! ~ -
Ji-hwan【 Warm congratulations 】 Shaanxi Chengda Industrial Furnace Manufacturing Company in South Korea, North Chungcheong County precious metal smelting furnace equipment installation and careful manufacturing and strict commissioning, looking forward to the future in more fields to achieve mutually beneficial win-win cooperation!
Contact Person :
Du
Phone Number :
13991381852
Double electrode DC arc furnace with World's leading technology/invention patents
| Place of Origin | China |
|---|---|
| Brand Name | Shaanxi Chengda |
| Certification | ISO 9001 |
| Model Number | Negotiate based on equipment processing capacity |
| Minimum Order Quantity | 1 unit |
| Price | The price will be negotiated based on the technical requirements and supply scope of Party A |
| Packaging Details | Discuss according to the specific requirements of Party A |
| Delivery Time | 2~3 months |
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | Complete production supply chain, supply on time, and meet quality standards |
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xProduct Details
| Highlight | Double electrode DC arc furnace,DC arc furnace with patents,Steelmaking DC arc furnace |
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|---|---|---|---|
Product Description
Double-electrode DC arc furnace (DE-DC EAF) is a smelting equipment that uses two graphite electrodes (one cathode and one anode) to form a DC arc, with stable arcs, low noise, and low electrode consumption, suitable for steelmaking, non-ferrous smelting, and metal recycling. Below is a detailed technical and application overview:
Basic Structure & Working Principle
- Core Components: Two graphite electrodes (cathode + anode), DC power supply (thyristor rectification), furnace body (water-cooled furnace cover/wall, refractory lining), electrode lifting mechanism, and optional bottom anode (for some configurations).
- Working Principle: DC current flows from the anode electrode through the molten bath to the cathode electrode, forming two arcs (one between each electrode and the bath). It avoids the complex design of single-electrode DC EAF bottom anodes and is easy to retrofit from AC furnaces.
- Arc Characteristics: Arcs are stable and concentrated, with a deflection angle of 15°–30° toward the bath; electromagnetic force causes the arc to rotate around the center (several times per second), ensuring uniform heating.
Key Technical Parameters (Typical Ranges)
| Parameter | Laboratory/ Small (≤5t) | Industrial/ Medium (5–50t) | Industrial/ Large (≥50t) |
|---|---|---|---|
| Rated Capacity | 0.5–5t | 5–50t | 50–420t |
| DC Input Voltage | 300–500V | 500–800V | 800–1200V |
| Rated Current | 1–5kA | 5–20kA | 20–280kA (e.g., 420t furnace: 280kA total) |
| Rated Power | 0.5–2MW | 2–10MW | 10–50MW |
| Electrode Diameter | 200–400mm | 400–700mm | 700–1200mm |
| Melting Noise | ≤90dB | 85–88dB (15dB lower than AC EAF) | 85–90dB |
| Electrode Consumption | ≤1.2kg/t | 0.8–1.0kg/t (50% lower than AC EAF) | 0.6–0.9kg/t |
| Melting Rate | 2–4℃/min | 4–6℃/min | 5–8℃/min |
| Tapping Temperature | 1600–1700℃ | 1650–1800℃ | 1700–1850℃ |
Core Advantages vs. Traditional Furnaces
- Arc Stability & Uniform Heating: No arc flicker; electromagnetic stirring of the bath eliminates hot spots, reducing lining erosion by 20%–30%.
- Low Energy & Electrode Consumption: Power consumption is 5%–10% lower than AC EAF; electrode consumption is reduced by ~50% compared to AC EAF (single-electrode DC EAF level).
- Grid-Friendly: Smaller voltage fluctuations and reactive power changes; DC reactor suppresses inrush current, suitable for areas with weak grids.
- Flexible Retrofit: No need for complex bottom anodes; existing AC furnace vessels can be converted to DE-DC EAF at low cost.
- Low Noise: Melting noise is ~87dB (15dB lower than AC EAF), with mainly high-frequency components that are easy to isolate.
Application Scenarios
- Special Steel Smelting: Bearing steel, low-carbon stainless steel, heat-resistant steel; high alloy recovery rate (≥96% for Ni/Cr/Mo).
- Non-Ferrous Metallurgy: Magnesium smelting (DC submerged arc furnace), copper/nickel alloy smelting; stable operation and large crystal grains.
- Metal Recycling: Scrap steel, smelting waste residue, and rare metal recovery; strong adaptability to raw materials.
- Refractory Metal Processing: Melting of tungsten/molybdenum alloys (with auxiliary plasma heating).
Typical Configuration & Operation Notes
- Electrode Configuration: Two top electrodes (cathode + anode) are standard; some large furnaces add 2–4 water-cooled bottom anodes to balance current distribution.
- Power Supply System: Thyristor rectifier + DC reactor; arc length is automatically adjusted by the electrode lifting mechanism to stabilize power input.
- Cooling System: Total water flow rate of 10–500m³/h, water pressure of 0.3–0.6MPa, and conductivity ≤50μS/cm to prevent electrode overheating.
- Atmosphere Control: Optional argon/nitrogen sealing to reduce oxidation and improve alloy recovery.
Comparison with Other Furnace Types
| Feature | Double-Electrode DC EAF | Single-Electrode DC EAF | Three-Phase AC EAF |
|---|---|---|---|
| Electrode Arrangement | Two top electrodes (cathode + anode) | One top cathode + bottom anode | Three top electrodes |
| Bottom Anode | Optional (simpler design) | Mandatory (complex design) | Not required |
| Arc Stability | High | High | Low (flicker) |
| Electrode Consumption | Low (~0.8–1.0kg/t) | Low | High (~2.0–3.0kg/t) |
| Retrofit Cost | Low (from AC furnaces) | High | N/A |
| Noise Level | Low (85–88dB) | Low | High (100–110dB) |
Development Trends
- Ultra-High Power: Large-scale furnaces (e.g., 420t) adopt dual-cathode + multi-bottom anode configurations to improve power density.
- Energy-Saving Technology: Combined with oxygen-fuel combustion and waste heat recovery, energy consumption is reduced by 10%–15%.
- Intelligent Control: AI-based arc length and temperature control systems to optimize smelting cycles.
- Environmental Protection: High-efficiency dust removal (emission concentration ≤10mg/m³) and low-NOₓ operation.
Summary
Double-electrode DC arc furnaces balance performance, cost, and flexibility, making them suitable for both new plants and AC-to-DC retrofits. They are widely used in high-quality steelmaking, non-ferrous smelting, and metal recycling, with significant advantages in energy saving, environmental protection, and operational stability.
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