Abstract
In our previous studies, we investigated the performance of a novel pneumatic planar magnetic separator (PMS) for the dry beneficiation of a selected magnetite ore. In the present study, we have extended the studies on the PMS with the focus on investigating how various PMS processing flowsheet configurations influence its performance. The outcomes were subsequently compared with those of a Davis tube recovery (DTR) tester. The study demonstrated that the use of PMS in the dry beneficiation of magnetite ores is feasible, and operating the PMS in different flowsheet configurations positively influences the magnetite concentrate grade and purity. Finally, the study showed that the PMS performance compares well with that of DTR and can potentially replace DTR in operations that are carried out in arid regions.
Highlights
The global steel industry has heavily depended on iron (Fe) products sourced from high-grade hematite deposits [1]
The results show that the percentage of magnetite that was fully liberated consistently improved in the previous section, mineral associations provide information about the spatial relationship with the finer fractions; it declined for thewhich minus 38 μm size fraction particles
For Flowsheet 2, the fraction of the rougher magnetic separation (RMS) concentrate (50%), which was coarser than 45 μm, was reground to improve mineral liberation, which led to the rejection of more gangue particles and subsequently resulted in low mass yield. These results clearly confirm that the performance of the planar magnetic separator (PMS) in concentrating a magnetite ore can be significantly improved by understanding the mineralogical characteristics of the ore applying different
Summary
The global steel industry has heavily depended on iron (Fe) products sourced from high-grade hematite deposits [1]. The continuous increase in the demand for steel products has led to a progressive depletion of these hematite deposits, and the development of alternative sources of iron becomes necessary to sustain the current iron production capacity and meet future demands [2]. Magnetite ores have gained significant attention in the iron industry. Magnetite is an iron oxide mineral found in metasedimentary and magmatic iron deposits [3]. It is generally black and has high magnetic properties. The latter property is exploited in the beneficiation of magnetite ores using low-intensity magnetic separation. Magnetite stoichiometrically contains the highest iron (72.4 wt %) compared with all the other sources of iron, its low-grade ore state usually contains low iron—magnetite ores located in Australia usually contain iron grades between
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