December 9, 2025
EAF (Electric Arc Furnace) Electrode Arms are available in two primary configurations: copper-steel composite arms and aluminum alloy arms, each tailored to meet specific operational requirements in the steelmaking process.
The utilization of aluminum alloy conductive cross arms in DC arc furnaces offers numerous benefits. Firstly, the lightweight nature of aluminum alloy arms enhances the speed and precision of electrode lifting and lowering operations, thereby improving overall control performance. Secondly, the superior vibration attenuation characteristics of aluminum alloy arms contribute to increased arc stability and power, making them a preferred choice for steelmaking applications.
EAF Electrode Arms are composed of several key components, including the electrode spray ring, electrode hoop, electrode chuck, electrode soot blowing device, electrode clamping system, cross arm body, water inlet pipe, return water pipe, oil inlet pipe, metal hose, and water-cooled cable connection plate. Each component plays a crucial role in ensuring the efficient and safe operation of the electric furnace.
EAF Electrode Arms are integral to the functionality of electric furnaces. An ideal conductive cross arm should possess excellent electrical conductivity, good processability, and a long service life for each component. Additionally, it should facilitate easy inspection and replacement of wearing parts. The electrode arm design eliminates the conductive copper tube structure, allowing the transverse arm to serve both as a supporting and conductive part, thereby simplifying the short net structure.
For optimal performance, the arrangement of electrode arms should be symmetrical, with spacing minimized under allowable conditions to reduce the overall size of the furnace structure. However, considerations must also be given to the convenience of installation and adjustment of the column guide wheel, ensuring that the size is not excessively reduced.
The use of conductive cross arms in EAFs offers several advantages:
The electrode arm of an electric arc furnace typically assumes a rectangular shape, with its height exceeding its width. Most electrode arms are water-cooled as a whole, featuring inner and outer interlayers for enhanced cooling efficiency.
In the early stages of conductive cross-arm development, the hollow interlayer water-cooled conductive cross-arms were designed with rectangular inner and outer shapes. However, the presence of welds made these designs prone to water leakage under high temperatures and strong water pressure, compounded by frequent irregular movements and vibrations. Internal water leaks were difficult to detect and repair, and the magnetic field within the cross arm caused eddy currents that damaged the seals of electrode clamping cylinders due to overheating.
To address these issues, material changes were implemented, significantly improving service life and reducing maintenance requirements by mitigating oil leakage and eddy current phenomena.
The outer layer of the electrode arm is typically made of copper plate for its superior electrical conductivity, while the inner layer consists of steel plate for structural support. Replacing the conductive copper tube with a copper plate increases the conductive area, reduces reactance and resistance values, and enhances power output to a certain extent.
Regardless of the type of electric arc furnace, induction furnace, ladle furnace, or other melting furnaces, Hani Metallurgy is committed to providing suitable, professional, efficient, and low-energy-consumption furnaces tailored to each customer's specific raw materials and melting requirements. Our EAF Electrode Arms, with their advanced design and material composition, are designed to meet the highest standards of performance and reliability in the steelmaking industry.
We are a professional electric furnace manufacturer. For further inquiries, or if you require submerged arc furnaces, electric arc furnaces, ladle refining furnaces, or other melting equipment, please do not hesitate to contact us at susan@aeaxa.com
