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EBT Electric Arc Furnace | Core Equipment for High-efficiency Slag-free Tapping & Short-process Steelmaking
Eccentric Bottom Tapping Electric Arc Furnace (EBT) is the core equipment of modern steelmaking short-process. Adopting furnace bottom eccentric tapping design, it realizes slag-free tapping and residual steel & slag retaining operation, which greatly improves molten steel quality and production efficiency, and meets the demand of ultra-high power smelting.
1. Equipment Composition
The EBT electric arc furnace consists of four core modules: furnace body system, mechanical system, electrical system and auxiliary system, featuring compact structure and high automation.
1.1 Furnace Body System
Furnace Shell: Divided into upper and lower shell. The lower part adopts nasal elliptical eccentric structure, lined with magnesium carbon brick / alumina-magnesia refractory brick. Water-cooled furnace wall coverage reaches 87%-90%.
Water-cooled Furnace Roof: Fully water-cooled structure with electrode hole in the center, equipped with sealing and smoke exhaust device.
Eccentric Tapping Box: Tapping hole set at the eccentric position of furnace bottom, matched with sliding gate / stopper opening and closing mechanism, filled with magnesia drainage sand for automatic pouring start.
1.2 Mechanical System
Electrode Lifting Mechanism: Copper-steel composite / aluminum alloy conductive cross arm with servo drive to adjust electrode lifting and arc power.
Furnace Tilting Mechanism: Hydraulic drive. Tilting angle on tapping side is only 5°-15°, with simplified structure and reduced short network loss.
Furnace Roof Lifting & Rotating Mechanism: Electric / hydraulic drive, cooperating with scrap charging and furnace maintenance.
Furnace Transformer: Ultra-high power configuration, unit power ≥ 600kVA/t, providing stable arc power supply.
Short Network System: High-current conductive loop with low impedance design to reduce power loss.
PLC Automatic Control System: Integrated electrode regulation, power control, tilting operation and safety interlock, supporting remote monitoring and data traceability.
1.4 Auxiliary System
Water Cooling System: Closed circulating water cooling key components such as furnace shell, furnace roof and electrode cross arm.
Hydraulic System: Providing power for furnace tilting, electrode lifting and tapping hole opening & closing.
Dedusting & Smoke Exhaust System: Equipped with bag dust removal / waste heat recovery to meet environmental protection standards.
Ladle & Ladle Car: Undertaking molten steel and matching with LF/VOD refining process.
3-5 minutes per heat, steel-slag separation rate ＞95%
Smelting Cycle
45-60 minutes per heat (With scrap preheating & continuous charging)
Residual Steel Volume
10%-15% of rated capacity, residual slag rate ≥95%
3. Performance Advantages
Slag-free Tapping & Pure Steel Quality: Eccentric bottom tapping with small-angle tilting retains slag inside the furnace, effectively reducing phosphorus and sulfur content, suitable for high-carbon steel and alloy steel production.
High Efficiency & Energy Saving with Cost Optimization: Smelting cycle shortened by 20%, heat loss reduced by about 20%; refractory service life extended by 15% with lower consumption.
Safe, Stable & Easy Operation: Avoid splashing risk of traditional tilting tapping; automatic pouring start rate over 90%, PLC one-key operation reducing labor intensity.
Compatible with Short-process Production: Can be matched with LF refining and continuous casting equipment to realize EAF-LF-CC short-process production, with annual output up to 400,000–800,000 tons.
4. Application Scope
Widely used in smelting of mild carbon steel, alloy steel, stainless steel and special steel. Suitable for scrap-based short-process steel mills, foundry enterprises and special steel production bases, serving as preferred equipment for modern green steelmaking.
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...
