Electric Arc Furnace (EAF)

Turnkey Electric Arc Furnace Steelmaking Solutions

Electric Arc Furnaces (EAF) are the backbone of modern scrap-based steelmaking and the preferred technology for energy-efficient mini-mill operations. As the steel industry continues to shift toward low-carbon and sustainable production, EAF technology plays an increasingly important role due to its flexibility in raw material usage and lower environmental impact. For plants relying on recycled steel, the stability of the melting process directly determines productivity, energy consumption, and final steel quality. Poor arc stability, inefficient oxygen injection, or uncontrolled slag practice can result in excessive power consumption, rapid electrode wear, longer tap-to-tap times, and inconsistent steel chemistry.

At Shanghai Metallurgy Equipment Group (SME), we deliver complete turnkey Electric Arc Furnace solutions—from raw material charging to tapping, dedusting, and integration with secondary metallurgy—ensuring a stable and efficient melting process. By combining optimized furnace design, advanced control systems, and proven process technology, our EAF solutions help reduce energy consumption per ton, improve arc stability, and enhance overall operational efficiency. This results in lower production costs, improved steel quality consistency, and reliable plant performance, providing customers with a solid foundation for long-term, sustainable steelmaking operations.

Electric Arc Furnace Process Flow

Standard EAF Steelmaking Process

Scrap Charging → Furnace Closing & Electrode Lowering → Arc Ignition & Melting → Oxygen & Carbon Injection → Foamy Slag Formation → Bath Refining → Slag Removal → Tapping → Ladle Transfer

The process begins with charging steel scrap, DRI, or hot metal into the furnace shell. High‑current electric arcs generated between graphite electrodes rapidly melt the metallic charge. Controlled oxygen blowing accelerates oxidation reactions and heat generation, while carbon injection promotes foamy slag formation, improving thermal efficiency and protecting refractory linings. After refining and slag removal, clean molten steel is tapped into a ladle and transferred to secondary refining units for precise composition control.

Key Furnace Parameters and Configurations

Main Equipment of an Electric Arc Furnace System

A complete Electric Arc Furnace (EAF) steelmaking line is composed of several key equipment groups that work together to ensure stable melting, efficient energy use, and consistent steel quality.

Core equipment includes:

· Electric Arc Furnace body (shell, roof, water-cooled panels, tilting system)

· Graphite electrode system with automatic regulation

· Furnace transformer and high-current power supply 

· Scrap charging system (crane, baskets, or continuous charging)

· Oxygen, carbon, and burner injection system 

· Off-gas and dedusting system 

· Ladle transfer and tapping equipment 

These systems form the foundation of any modern scrap-based steel plant and directly influence power consumption, tap-to-tap time, and refractory life.

Typical EAF Equipment Combinations

Different steel plants use different equipment configurations depending on capacity, product type, and investment level. The most common layouts are shown below.

1. Standard Mini-Mill Configuration

Process route:

EAF → Ladle Furnace (LF) → Continuous Casting Machine (CCM)

Key features:

· Suitable for construction steel and general carbon steel

· Flexible raw-material mix (scrap, DRI, hot metal)

· Lower initial investment

This is the most widely used configuration in small and medium-scale steel plants.

2. Energy-Efficient EAF with Scrap Preheating

Equipment combination:

Shaft / conveyor scrap preheating → EAF → LF → CCM

Advantages:

· Reduced electricity consumption

· Faster melting and shorter tap-to-tap cycle

· Lower electrode consumption

This configuration is ideal for plants facing high electricity costs or strict carbon-emission regulations.

3. EAF with Advanced Secondary Refining

Process route:

EAF → LF → VD / VOD → CCM

Suitable for:

· Alloy steel

· Low-carbon steel

· Stainless and special steel grades

Vacuum refining improves hydrogen removal, chemical accuracy, and steel cleanliness, making this layout suitable for high-end steel production.

Why Choose SME Electric Arc Furnace Systems?

· Proven energy‑efficient EAF design with reduced power consumption per ton

· Advanced electrode regulation and arc control for stable melting

· Optimized oxygen and carbon injection systems for faster refining

· Long refractory life through stable foamy slag operation

· Full turnkey EPC capability, including dedusting, automation, and downstream ladle furnace integration

Our Electric Arc Furnace technology enables flexible, environmentally responsible steel production while supporting high productivity and consistent steel quality. SME turnkey systems are engineered to help steel producers build or upgrade scrap‑based steel plants with confidence, achieving lower operating costs and reliable long‑term performance.