Recovery of Iron Ore From The Tailings of Tang Zagh Iron Beneficiation Plant: A Comparative Study of Gravity and Magnetic Separation Methods

Based on the importance of recovering iron ore tailings due to the decreasing high-grade deposits and the challenge of managing mining waste, this study focused on the recovery of hematite from the fine particles of the tailings dam sample prepared from the Tang Zagh processing plant. Analysis and characterization of the sample revealed that ۵۲% of the sample's weight is in the -۳۸ micron size fraction, and roughly ۵۵% of the iron is distributed within this size fraction. The main minerals in the sample include hematite, quartz, goethite, and occasionally magnetite. Additionally, the sample contains ۴۶% total iron and ۰.۶۷% FeO. To achieve the degree of liberation for various tests, the sample size was reduced to -۳۸ microns. Furthermore, three different approaches (gravity, magnetic, and a combination of gravity and magnetic) were employed for ore concentration. Through the Multi-Gravity Separator (MGS) at three stages, with angles of ۲, ۴, and ۶ degrees, a concentrate with a ۵۷.۹۲% grade and ۳۸.۹% iron recovery was produced. Utilizing the High Gradient Magnetic Separation (HGMS) method across three stages, magnetic field intensities of ۷۰۰۰, ۱۰۰۰۰, and ۱۳۰۰۰ Gauss, using the Box Mag device, yielded a concentrate with a ۶۱.۹۲% grade and ۱۲.۷۶% iron recovery. Considering the market potential for the concentrate with approximately ۵۸% Fe grade, the best approach for ore enrichment is the Multi-Gravity Separator (MGS), which surpasses the magnetic method in terms of higher recovery and economic feasibility. Moreover, the results indicate that a combination of the Multi-Gravity Separator and magnetic tests can be employed to increase iron grade and recovery. Using this approach, a concentrate with a grade of ۶۲.۳۲% Fe and ۱۷.۸۷% recovery was achieved.

کلیدواژه ها:

Fine Hematite Particles ، Multi-Gravity Separator (MGS) ، HGMS ، Tang_Zagh Mine