Abstract Although the commercial beneficiation of iron ores by magnetic separation uses well established technology and equipment, there are still some fundamental and applied questions that have not been addressed in current published documentation. The main aspects investigated in this paper included the magnitude of the applied magnetic field, the effects of various matrices and the effects of the particle sizes of the materials. The wide range of recoveries of hematite particles to the magnetic fraction was attributed to their mineralogical characteristics and particle sizes. The use of various expanded metal matrices had significant effects on the recoveries of the hematite to the magnetic fraction, which is one of the innovative aspects of this study. The use of a fine expanded metal matrix with its many sharp edges and corners enhanced the localised magnetic field intensity, giving much higher recoveries of hematite to the magnetic products. The use of the fine expanded metal matrix to the processing of a very low-grade commercial tailing sample suggested an enhancement factor of approximately ten compared to a commercially available magnetic separator that uses a grooved laminated rotor. The quantitative analysis of the effects of the matrix for enhanced recovery of fine hematite particles determined experimentally should lead to improved performance of commercial high intensity magnetic separators.

中文翻译：

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基体类型对铁矿石磁处理中WHIMS性能的影响

摘要 虽然通过磁选对铁矿石进行商业选矿使用了成熟的技术和设备，但仍有一些基础和应用问题在当前已发表的文献中没有得到解决。本文研究的主要方面包括外加磁场的大小、各种基质的影响以及材料粒径的影响。赤铁矿颗粒对磁性部分的广泛回收归因于它们的矿物学特征和颗粒尺寸。使用各种膨胀金属基质对赤铁矿对磁性部分的回收率有显着影响，这是本研究的创新方面之一。使用具有许多锋利边缘和拐角的精细延展金属基体增强了局部磁场强度，从而为磁性产品提供了更高的赤铁矿回收率。与使用带槽叠片转子的市售磁选机相比，将精细金属延展基体用于处理极低品位的商业尾矿样品表明增强因子约为 10。通过实验确定的基质对提高细赤铁矿颗粒回收率的影响的定量分析应该可以提高商业高强度磁选机的性能。与使用带槽叠片转子的市售磁选机相比，将精细金属延展基体用于处理极低品位的商业尾矿样品表明增强因子约为 10。通过实验确定的基质对提高细赤铁矿颗粒回收率的影响的定量分析应该可以提高商业高强度磁选机的性能。与使用带槽叠片转子的市售磁选机相比，将精细金属延展基体用于处理极低品位的商业尾矿样品表明增强因子约为 10。通过实验确定的基质对提高细赤铁矿颗粒回收率的影响的定量分析应该可以提高商业高强度磁选机的性能。