Beneficiation and flowsheet development of a low grade iron ore: a case study

Abstract

In the present study a detailed characterization followed by beneficiation of low grade iron ore was studied. The Run of Mine (R.O.M) sample assayed 21.91 % Fe, which is very low grade in nature. The impurities are SiO 2 26.25%, MgO 20.48%, CaO 5.85%, Al 2 O 3 1.86% and loss on ignition (LOI) 12.71%. A Davis Tube test was performed for the assessment of the separability of magnetic ores by low intensity magnetic separators. The heavy liquid test was carried out to evaluate the possible response of the sample by the gravity concentration technique. The samples were subjected to jigging, dry low intensity magnetic separation (DLIMS) and shaking table tests. Thus a sufficient concentrate could not be obtained in +1 mm by using jigging and DLIMS. The obtained results show that the a high grade iron concentrate (>65% Fe) with lower recoveries was obtained from shaking table tests by using-1 mm fraction. According to the results a flowsheet was developed. From the developed flowsheet, it is possible to obtain pellet grade concentrate with 65.41% Fe, 2.54% SiO2, 2.79% MgO, 0.70% CaO and 0.32% Al 2 O 3. with 21.42% weight recovery. The overall gangue rejection recovery of the circuit is over 95%.

Processing of Hematite Ore by using Magnetizing Reduction Roasting and Magnetic Separation

“…(6,7) The quantity and kind of impurities present in the ore body significantly impact how iron ores are processed. (8) The mineralogical composition, the liberation size, and the interactions between various components (iron, silica, alumina, etc.) are all factors that are considered in low-grade iron ore valuation studies.…”

Investigation of chromite recovery possibilities from coarse and fine plant tailings

“…In the last two decades, many processes for the recovery of Turkish chromite and plant tailings have been performed and reported (Guney et al, 1991;Ucbas and Ozdag, 1994;Cicek et al, 1998;Gence, 1999;Ozkan and İpekoglu, 2001;Cicek and Cocen, 2002;Ozcan and Ergun, 2013;Altın et al, 2018;Can et al, 2019;Deniz, 2019).…”