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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
New Energy-saving DC Electric Arc Furnace
| 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 months |
| Payment Terms | Western Union,L/C,T/T,D/P |
| Supply Ability | Complete production supply chain, supply on time, and meet quality standards |
Product Details
| Melting Material | Scrap Steel | Equipmenttype | Industrial Machinery |
|---|---|---|---|
| Powersource | Electricity / Natural Gas | Marketing Type | Ordinary Product |
| Product Class | DCS System | Automation Level | High |
| Cooling System | Water-cooled | Furnace Control System | PLC Or Computerized |
| Highlight | energy-saving DC electric arc furnace,steelmaking electric arc furnace,DC arc furnace with warranty |
||
Product Description
New Energy-saving DC Electric Arc Furnace
1. Basic Equipment Structure
The new energy-saving DC electric arc furnace consists of seven core modules: furnace body, IGBT/thyristor rectifier power supply system, top graphite electrode, bottom conductive anode, water cooling system, hydraulic tilting mechanism and PLC intelligent control system.
- Electrode Configuration: The mainstream design adopts single top graphite electrode plus furnace bottom anode; the updated dual-electrode design without bottom anode effectively avoids furnace bottom burn-through. Compared with 3-electrode layout of AC furnaces, the electrode auxiliary structure is greatly simplified.
- Power Supply Upgrade: The latest generation is equipped with IGBT flexible rectifier power supply, an upgraded version of traditional thyristor power supply. It realizes full-digital closed-loop regulation, stepless voltage & current adjustment and online polarity switching without shutdown, supporting both submerged-arc and open-arc smelting modes for dual-purpose of arc furnace and submerged arc furnace.
- Intelligent Automatic Control: The PLC system enables one-key switching among constant power / constant current / constant voltage smelting modes. Soft start prevents power grid impact, with full protection against overvoltage, overcurrent, phase loss and overtemperature.
2. Core Energy-saving Technical Indicators (vs. Conventional 3-phase AC EAF)
| Items | Energy-saving Index | Technical Description |
|---|---|---|
| Power Consumption | 10%～15% electricity saving | No alternating eddy current loss; power factor reaches 0.95~0.98 (0.7~0.9 for AC furnace requiring extra reactive power compensation), no extra power loss from arc extinction at zero-crossing current |
| Graphite Electrode Consumption | 30%~50% consumption reduction | Free of alternating current skin effect; concentrated arc avoids furnace wall sweeping; side oxidation accounts for over 44% of total electrode loss on AC furnaces |
| Refractory Lining | Service life extended over 30% | DC arc deflection only 12° versus 45° of AC arc; arc rarely scours furnace lining with no local overheating hot spots |
| Production Efficiency | Tap-to-tap cycle shortened by 8%~12% | Self-generated electromagnetic stirring homogenizes molten steel temperature and composition for faster tapping; advanced furnaces achieve power consumption as low as 300kWh per ton of molten steel |
| Noise & Power Quality | Noise reduced by 10~20dB; harmonic & flicker cut in half | Balanced three-phase input minimizes grid disturbance and eliminates demand for large-capacity filter devices |
3. Fundamental Energy-saving Mechanism
- Reduced Circuit Loss: Alternating current induces alternating magnetic field and eddy heat loss; constant DC magnetic field eliminates eddy heating on short-net cables to cut invalid power waste.
- Stable Arc Combustion: DC current has no zero-cross point, maintaining continuous arc without intermittent extinction to improve thermal efficiency via concentrated directional heat input.
- Built-in Electromagnetic Stirring: DC current forms fixed-direction magnetic field to drive circulating molten bath, eliminating extra power-consuming external electromagnetic stirring equipment and accelerating raw material melting.
- Flexible Power Regulation: Modular IGBT rectifier outputs precise power on demand; intelligent current limiting during scrap collapse and impact-free arc reignition prevent instantaneous peak power waste.
4. Applicable Smelting Materials
- Ferrous Metallurgy: Scrap steel melting for carbon steel, stainless steel, alloy steel, bearing steel, die steel and pig iron production; short-process EAF steelmaking cuts around 1.6 tons of CO₂ emission per ton of scrap processed.
- Ferroalloy & Non-ferrous Metallurgy: Production of ferrosilicon, ferrochrome, ferromanganese, calcium aluminate, red mud-based iron smelting and precious metal refining.
- Solid Waste Recycling: Melting treatment of fly ash, metallurgical slag and hazardous solid waste for resource recovery, realizing multi-purpose single equipment.
5. New-generation Technical Advantages
- Reversible Polarity Technology: Real-time anode-cathode switching during smelting evens out furnace temperature distribution to eliminate overheating or cold zones, further lowering power consumption and improving finished product yield.
- Integrated Scrap Preheating System: Flue gas waste heat recovers to preheat incoming scrap, saving another 20~35kWh power per ton of steel.
- Digital Smelting Control: Real-time collection of arc voltage, arc current and furnace temperature data; AI self-adaptive power curve optimizes energy consumption to comply with low-carbon steelmaking policies.
6. Application Advantages & Industry Trend
- Capital & O&M Cost: Lower investment on matching electrodes, short-net cables and reactive power compensation facilities; comprehensive operating cost 18%~25% less than conventional AC furnaces.
- Policy Compliance: Short-process EAF steelmaking is core route for domestic low-carbon steel transformation; energy-saving DC furnaces are prioritized for scrap recycling and dual-carbon compliant projects in special steel & renewable metallurgy sectors.
- Full Size Range: Complete product lineup from 0.5t lab-scale furnace, 5t/10t/20t industrial furnace up to hundred-ton large-scale steelmaking furnace.
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