The green processing of weakly magnetic iron ore is inseparable from high-intensity and high-gradient magnetic separator (HGMS), which is one of the most energy-intensive magnetic separation equipment. Iron (Fe) armor serves as the key primary structure for enhancing magnetic field conduction efficiency within the magnetic system. The order of magnetic properties of commonly used magnetic yoke materials is: ordinary carbon structural steel < Q235 steel < DT4 electrical pure iron. But the utilization cost of DT4 electrical pure iron is the highest, especially the magnetic properties of DT4C super electrical pure iron are unstable and the yield is low. On the basis of ordinary pure iron materials, this article has developed a new type of 411 pure iron (411) upon controlling the levels of harmful elements, while increasing the concentration of beneficial elements.intensity Furthermore, through the utilization of magnetic field simulation software, the impact of 411 on the background magnetic field intensity of HGMS was analyzed. The results indicated that the newly developed 411 pure Fe exhibited a coercivity of 24.07 A/m, a saturation magnetization intensity of ∼ 1.69 T, a maximum relative magnetic permeability of 24.38 × 10-3H/m, demonstrating superior magnetic properties in comparison with Q235 and DT4C. When using 411 pure iron as the magnetic yoke material, the background magnetic field intensity of the HGMS can be increased by 6.85 % − 14.64 % compared with using DT4C super pure iron under the same excitation current conditions. The magnetic yoke with better magnetic conductivity will enhance the magnetic field utilization efficiency of the magnetic system, a reduce the excitation energy consumption, and improve the sorting performance of HGMS.

中文翻译：

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高磁导率磁铁对高梯度磁选机能耗降低的影响研究


弱磁铁矿石的绿色加工离不开高强度、高梯度磁选机（HGMS），HGMS是能耗最高的磁选设备之一。铁 （Fe） 装甲是提高磁系统内磁场传导效率的关键初级结构。常用磁轭材料的磁性能顺序为：普通碳素结构钢 < Q235 钢 < DT4 电工纯铁。但DT4电纯铁的利用成本最高，特别是DT4C超级电纯铁的磁性能不稳定，收率低。本文在普通纯铁材料的基础上，在控制有害元素水平的同时，提高了有益元素浓度，开发了一种新型的411纯铁（411）。此外，利用磁场模拟软件，分析了411对HGMS背景磁场强度的影响。结果表明，新开发的 411 纯铁表现出 24.07 A/m 的矫顽力，饱和磁化强度约为 ∼ 1.69 T，最大相对磁导率为 24.38 × 10-3H/m，与 Q235 和 DT4C 相比表现出优异的磁性能。当使用 411 纯铁作为磁轭材料时，在相同的励磁电流条件下，与使用 DT4C 超纯铁相比，HGMS 的背景磁场强度可以提高 6.85 % − 14.64 %。具有更好导磁率的磁轭将提高磁系统的磁场利用效率，降低励磁能耗，提高HGMS的分选性能。