The conductive electrode arm is a new type of cross arm made of copper steel composite plate or aluminum steel composite plate, with a rectangular cross-section shape and internal water cooling. The electrode arm eliminates many insulation links between the water-cooled conductive copper tube, 2 electrode voltage clamp, and cross arm, greatly simplifying the cross arm structure in ultra-high power electric arc furnaces.
Lightweight, high stiffness, low impedance, and long service life.
The conductive cross arm is a key component of the electrode lifting system in electric arc furnaces (EAF).
One end of the arm is mounted on the electrode column, while the other end clamps the electrode and enables vertical movement.
The lightweight design minimizes the driving power required for electrode lifting and adjustment, improving operation response and energy efficiency.
The hollow box-section structure combined with a double-layer copper–steel composite plate greatly reduces the skin effect, lowers electrical impedance, and enhances electrothermal efficiency.
As part of the electric furnace, the internal water-cooled channels ensure excellent mechanical strength and thermal stability, maintaining precise electrode positioning and stable arc operation with minimal vibration.
Compared with traditional steel-tube cross arms, this design achieves lighter weight, lower inertia, and longer service life, allowing for frequent and accurate electrode movements.
Type | Material Composition | Structure Type | Main Features | Impedance | Weight | Service Life |
Traditional Type | Carbon steel tube | Hollow round tube | Simple structure, heavy, high inertia | High | Heavy | Short |
Aluminum Alloy Type | Aluminum alloy | Hollow plate or tube | Lightweight, but poor stiffness and thermal resistance | Medium | Light | Medium |
Copper Type | Pure copper | Solid or laminated | Excellent conductivity, but very heavy and costly | Low | Very Heavy | Long |
Copper–Steel Composite Type (Our Design) | 20+10 mm copper–steel composite plate (outer copper, inner steel) | Hollow box-section with water-cooled channel | High stiffness, very low impedance, excellent thermal management and long lifespan | Very Low | Light | Long |
China’s only manufacturer using 20+10 mm copper–steel composite plates for conductive cross arms.
China’s largest producer and designer of 350-ton EAF conductive cross arms.
Single cross arm weight up to 18,000 kg, ensuring unmatched mechanical strength and current-carrying capacity.
Low impedance design greatly improves electrical efficiency and reduces power loss.
Water-cooled structure provides superior heat resistance and long-term stability.
Optimized composite structure combines the conductivity of copper with the strength of steel.
The hollow section and double-layer copper steel composite plate are adopted to greatly reduce the Skin effect, reduce the impedance and improve the electric heating efficiency;
As parts of electric furnace, the hollow cross-section box structure and internal water-cooled channel greatly enhance the strength of the cross arm, which is conducive to adjusting electrode movement without causing vibration and is conducive to arc stability;
The weight is lighter than traditional steel tube type cross arms, with small inertia, which is conducive to frequent electrode lifting and adjustment.
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