During last decades, extracting value-added products from industrial waste materials became a crucial research area because it not only provides valuable products but also mitigates the problem with disposal of these wastes and, at the same time, it facilitates saving natural resources. Various dense media for industrial separations are based on a variety of raw materials or commercially manufactured materials, such as clay, quartz, slate, galena, magnetite or ferrosilicon. Studies using industrial wastes for this purpose are very scarce and relate namely to zinc-lead waste or silicon-based waste; using such solids can provide required density but hinders the subsequent magnetic separation of the solid from the separation medium (which can be achieved if magnetic solid is used).To address the aforementioned challenge, this study is focused to industrial materials produced in huge quantities (metallurgical wastes, power station ashes) and/or their fractions containing higher iron levels in order to find a suitable substituent for magnetite in terms of their utilization for dense medium (coal) cleaning applications. Particular attention is paid to evaluation of the density of these materials and/or their fractions, which predetermines their applications in dense medium separations.Keywords: Material recovery of waste, coal, dense medium, density, magnetic separation
© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.