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International Journal of Mining and Geo-Engineering، جلد ۵۹، شماره ۲، صفحات ۱۶۵-۱۷۰
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عنوان انگلیسی The upgrading of low-grade iron ore: optimization of recovery and reduction of feed volume
چکیده انگلیسی مقاله The present study investigated the potential for iron recovery from magnetite-bearing iron ore tailings at the Sangan Company’s old dumps, aiming to reduce environmental challenges through wet magnetic separation as a pre-beneficiation stage. This method selectively removed coarse gangue while maximizing magnetite recovery. A full factorial experimental design evaluated the effects of magnetic field intensity (1200, 2700, 3400 gauss), drum speed (1, 1.4 m/s), and pulp solids content (25%, 35%). Concentrate analysis was performed using titration and Satmagan methods. Partial Least Squares (PLS) modeling revealed that higher magnetic field intensities significantly improved magnetite recovery, enabling a feed mass reduction of 18–22% with negligible magnetite loss (~2–3%). Magnetite recovery from tailings represents a novel approach, achieving up to 97.21% recovery under optimal conditions. Davis Tube tests confirmed that lost magnetite, with iron grades below 13.63%, is unsuitable for the final concentrate, enhancing overall concentrate quality by its removal. This pre-upgrading process improves concentrate quality, reduces operating costs, and supports sustainable tailings management.
کلیدواژه‌های انگلیسی مقاله Low-grade iron ore,Magnetic Separation,upgrading,Pre-processing,Design of Experiments
نویسندگان مقاله Mahdieh Seyfi |
Mining Engineering Department, Tabriz University of Technology, Tabriz, Iran.

Parviz Pourghahramani |
Mining Engineering Department, Tabriz University of Technology, Tabriz, Iran.

نشانی اینترنتی https://ijmge.ut.ac.ir/article_102438_bc6acb300285149686b24403a3a3fc73.pdf
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