Influence of process parameters of dry high intensity magnetic separators on separation of hematite
Influence of process parameters of dry high intensity magnetic separators on separation of hematite
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DOI：
10.1016/j.minpro.2017.01.007
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发表时间：
2017-03-10
影响因子：
--
通讯作者：
Suresh, Nikkam
中科院分区：
文献类型：
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作者：
Tripathy, Sunil Kumar;Singh, Veerendra;Suresh, Nikkam
稀土辊式磁选机（RERMS）和感应辊式磁选机（IRMS）是一种简单、高效的干式强磁选机，可用于不同顺磁性矿物的精选。这些是最普遍采用的用于分离矿砂的单元，但其用于加工其他矿物的应用很少。在目前的调查中，已经作出了努力，以了解RERMS和IRMS的不同的过程变量的作用，从低品位矿石中分离赤铁矿粉。在进行磁分离研究之前，对材料的物理、化学、矿物学和磁性进行了详细的表征，并从磁分离的角度对其进行了严格的讨论。根据表征结果，通过改变一些相关工艺变量，使用RERMS和IRMS进行磁性分离。此外，在这些单元中的赤铁矿偏析的每个变量的影响进行了讨论，并得出了最佳的工艺条件，从低品位矿石的赤铁矿粉的有效回收。这些分离器的分离效率进行了比较，从QEMSCAN获得的释放数据。最后，本文得出结论，说明RERMS和IRMS可以用作预浓缩器/清除器单元，以在单一阶段的干式操作中丢弃最大量的脉石，这将节省关于矿石的细磨以用于解离的能量。(C)2017爱思唯尔B. V.保留所有权利。
Rare earth roll magnetic separators (RERMS) and induced roll magnetic separators (IRMS) are the simple and efficient dry high-intensity magnetic separators used for upgrading different paramagnetic minerals. These are the most popularly adopted units for separation of mineral sands, but its application for processing of other minerals is scanty. In the present investigation, an effort has been made to understand the role of different process variables of RERMS and IRMS to separate the hematite fines from a low-grade ore. Before magnetic separation studies, detailed characterisation of the material was carried out regarding physical, chemical, mineralogical and magnetic properties which are discussed critically from the magnetic separation point of view. Based on the findings of the characterisation, magnetic separation was conducted using RERMS and IRMS by varying some of the relevant process variables. Further, the effects of each variable on hematite segregation in these units were discussed, and optimum process conditions were derived for the efficient recovery of hematite fines from the low-grade ore. The separation efficiency of these separators is compared with liberation data obtained from QEMSCAN. Finally, the paper concludes stating that RERMS and IRMS can be utilized as a pre-concentrator/ scavenger unit to discard a maximum amount of gangue in a single stage of dry operation which will save energy regarding the fine grinding of the ore for liberation. (C) 2017 Elsevier B.V. All rights reserved.