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<p>To address the lack of comprehensive investigation into eddy current losses in AC submerged arc furnace (SAF), a three-dimensional (3D) eddy current loss model for a full-scale large AC SAF was established, incorporating all critical metallic components, including electric cables, roof, shell, electrode columns, off-gas ducts, and charging ducts. The spatial magnetic field distribution and eddy current loss characteristics under strong electromagnetic coupling conditions were systematically investigated. The results indicated that the magnetic flux density exhibited strong spatial non-uniformity and was mainly concentrated near the electric cables, with a maximum value of 0.33 T. Significant non-uniform current density and power density distributions were observed in the electric cables due to the combined effects of skin effect and mutual inductance. Distinct localized eddy current loss characteristics were identified in different furnace components. Furthermore, the component losses increased significantly with increasing current and exhibited clear positive correlations with the operating current. The electric cables exhibited the highest total loss of 963.26 kW, accounting for 58.41 pct of the total component losses, while the total loss of all components reached 1649.16 kW, corresponding to 6.34 pct of the furnace active power. The present study provides theoretical guidance for mitigating eddy current effects and improving the energy efficiency of large AC SAFs.</p>

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Study on Eddy Current Losses in a Full-Scale Large AC Submerged Arc Furnace with All Components

  • 期刊论文

  • 发表日期：

    2026年7月24日

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  • Xiaoqing Tang,
  • Yang Yu,
  • Wenjie Rong,
  • Baokuan Li,
  • Zhongqiu Liu

摘要

To address the lack of comprehensive investigation into eddy current losses in AC submerged arc furnace (SAF), a three-dimensional (3D) eddy current loss model for a full-scale large AC SAF was established, incorporating all critical metallic components, including electric cables, roof, shell, electrode columns, off-gas ducts, and charging ducts. The spatial magnetic field distribution and eddy current loss characteristics under strong electromagnetic coupling conditions were systematically investigated. The results indicated that the magnetic flux density exhibited strong spatial non-uniformity and was mainly concentrated near the electric cables, with a maximum value of 0.33 T. Significant non-uniform current density and power density distributions were observed in the electric cables due to the combined effects of skin effect and mutual inductance. Distinct localized eddy current loss characteristics were identified in different furnace components. Furthermore, the component losses increased significantly with increasing current and exhibited clear positive correlations with the operating current. The electric cables exhibited the highest total loss of 963.26 kW, accounting for 58.41 pct of the total component losses, while the total loss of all components reached 1649.16 kW, corresponding to 6.34 pct of the furnace active power. The present study provides theoretical guidance for mitigating eddy current effects and improving the energy efficiency of large AC SAFs.