Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"Double electrode DC arc furnace with World's leading technology\/invention","imgUrl":"https:\/\/img.chinax.com\/nimg\/8f\/ed\/6092acda66a44108ea70f8642e51-200x200-1\/double_electrode_dc_arc_furnace_with_world_27s_leading_technology_2finvention.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO 9001","Place of Origin":"China"}}
{"title":"HX 3-Phase Steel Making Electric Arc Furnace for 5ton 8ton 10ton 15ton 20ton","imgUrl":"https:\/\/img.chinax.com\/nimg\/8e\/b9\/b685fcdf4b43d49502bf7932703e-200x200-1\/hx_3_phase_steel_making_electric_arc_furnace_for_5ton_8ton_10ton_15ton_20ton_30ton_50t_60t.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"Xi 'an, China"}}
{"title":"Direct Current Arc Furnace Direct Current DC Arc Furnace For Metal Melting","imgUrl":"https:\/\/img.chinax.com\/nimg\/65\/41\/f44bef2b447750f46e55742c700d-200x200-1\/direct_current_arc_furnace_direct_current_dc_arc_furnace_for_metal_melting.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"High Capacity Electric Arc Furnace For Batch Or Continuous Operation 50-300 Tons","imgUrl":"https:\/\/img.chinax.com\/nimg\/51\/60\/29a3ab3dcba73d293ddea5e99e85-200x200-1\/high_capacity_electric_arc_furnace_for_batch_or_continuous_operation_50_300_tons.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"China"}}
{"title":"Ladle Refining Furnace (New)","imgUrl":"https:\/\/img.chinax.com\/nimg\/23\/6f\/560061bdcfde837960e560f75f11-200x200-1\/ladle_refining_furnace_28new_29.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"Special Alloy Smelting Furnace with ISO 9001 Certification","imgUrl":"https:\/\/img.chinax.com\/nimg\/cd\/a2\/d50cf01eb3663830417fbdb8c146-200x200-1\/special_alloy_smelting_furnace_with_iso_9001_certification.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"Dc Steel-Making Electric Arc Furnace with 5t 10t 50t 100t","imgUrl":"https:\/\/img.chinax.com\/nimg\/8e\/b9\/b685fcdf4b43d49502bf7932703e-200x200-1\/dc_steel_making_electric_arc_furnace_with_5t_10t_50t_100t.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
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.
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.
Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroall... Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroall...
