Abstract

The design of short power-supply networks for ore-reduction thermal furnaces (submerged-arc electric furnaces) should provide a minimum of active and inductive resistance and their phase symmetry. The mutual arrangement of the power source and the working space of such furnaces determine the different lengths of a rigid fixed section in a short network, which leads to an asymmetry of the short power-supply network as a whole, to an uneven power density throughout the entire working space, and, therefore, to an uneven wear level of the lining and to a reduced furnace productivity. At high currents, the phases are split into parallel conductors and, if possible, half-phases are realigned in order to reduce their inductive resistance. The section of the short power-supply network under consideration is made of rectangular busbars or tubular busbars. Novel variants for the transposition and realignment of busbar packages for round ore-reduction thermal furnaces have been proposed in order to equalize the phase inductance with no significant changes in the size of the busbar packages. The novel variants have been assessed via a numerical simulation of electromagnetic processes occurring in the elements of a short power-supply network in a two-dimensional formulation using an ANSYS software package. Specific examples for balancing busbar packages in operating furnaces are presented.

中文翻译：

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矿石还原热炉次级电流引线中的平衡母线封装

摘要

用于矿石还原热炉（埋弧电炉）的短电源网络的设计应提供最小的有源电阻和电感电阻及其相位对称性。这类炉子的电源和工作空间的相互布置，决定了短网络中刚性固定段的不同长度，导致短电源网络整体不对称，整体功率密度不均匀。整个工作空间，从而导致炉衬的不均匀磨损水平和降低的熔炉生产率。在高电流下，相被分成平行导体，如果可能，半相重新排列以减少它们的电感电阻。所考虑的短电源网络部分由矩形母线或管状母线制成。已经提出了用于圆形矿石还原热炉的母线封装的换位和重新排列的新型变体，以便在母线封装的尺寸没有显着变化的情况下均衡相电感。新型变体已通过使用 ANSYS 软件包以二维公式对短电源网络元件中发生的电磁过程进行数值模拟进行评估。介绍了在操作炉中平衡母线包的具体示例。新型变体已通过使用 ANSYS 软件包以二维公式对短电源网络元件中发生的电磁过程进行数值模拟进行评估。介绍了在操作炉中平衡母线包的具体示例。新型变体已通过使用 ANSYS 软件包以二维公式对短电源网络元件中发生的电磁过程进行数值模拟进行评估。介绍了在操作炉中平衡母线包的具体示例。