Analysis of graphite electrode fractures in electric arc furnace operations
Handan Qifeng Carbon outlines key indicators to distinguish between manufacturing defects and operational errors in electrode breakage.
Graphite electrode fractures during electric arc furnace (EAF) steelmaking stem from either material quality issues or operational mismanagement. Handan Qifeng Carbon notes that determining the root cause requires evaluating the specific location of the fracture relative to the electrode body or joint.
Fractures occurring within the electrode body are typically attributed to internal structural defects, insufficient density, or inadequate thermal shock resistance under high-power conditions. Conversely, breaks near the clamping zone or joint are frequently the result of external mechanical forces, such as falling scrap or improper alignment and torque during installation. Mismanaged joint connections remain a primary source of failure in EAF environments.
Industry data indicates that over 80% of electrode-related accidents are linked to joint instability. The company advises steelmakers to correlate fracture surface morphology with operational logs, including overload events and potential scrap collapses, to improve maintenance protocols and equipment longevity.