Eccentric Bottom Tapping Electric Arc Furnace

Equipment and Parameter Introduction

EBT Electric Arc Furnace | Core Equipment for High-efficiency Slag-free Tapping & Short-process Steelmaking

1. Equipment Composition

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.
• Oxygen & Carbon Injection Lance System: Furnace wall bundled jet design, supporting foamed slag submerged arc smelting, enhancing oxygen supply and carburizing efficiency.

1.3 Electrical System

• 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.

2. Main Technical Parameters (Standard Reference)

3. Performance Advantages

1. 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.
2. 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.
3. Safe, Stable & Easy Operation: Avoid splashing risk of traditional tilting tapping; automatic pouring start rate over 90%, PLC one-key operation reducing labor intensity.
4. 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

  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, ferroalloy refining furnaces, electric slag remelting furnaces, non-standard metallurgical equipment, heat treatment equipment, and various related environmental protection dust removal equipment. The company's product design and manufacturing capabilities have reached 100 tons for electric arc furnaces, 160 tons for ladle refining furnaces, and a capacity range of 3600KVA to 35000KVA for ore thermal furnaces. In accordance with national industrial policies, we have designed high and low voltage compensation systems, dust removal systems, ferroalloy DC furnaces, and new energy equipment suitable for the actual operation of the equipment. For inquiries, please contact Mr. Du at 13991381852 or Mr. Chen

13709182307.