en گروه استخراج Metallurgical Extraction and Processing Research Paper Research Paper <p>In the present work, iron recovery from a low-grade hematite ore (containing less than 40% iron), which is not applicable in common methods of ironmaking, was studied. Non-coking coal was used as reducing agent. Reduction experiments were performed under various coal to hematite ratios and temperatures. Reduction degree was calculated using the gravimetric method. Reduced samples were subjected to magnetic separation followed by X-ray diffraction analysis. Total iron content, degree of metallization and recovery efficiency in magnetic part were determined by quantitative chemical analysis, which were obtained about 82%, 95% and 64% respectively under optimal conditions. CaO as an additive improved ore reducibility and separation efficiency. The microstructure of reduced samples and final products were analyzed by scanning electron microscopy. Final product with a high degree of metallization can be used in steel making furnaces and charging of blast furnaces which can improve production efficiency and decrease coke usage.</p> Low-grade iron ore, Coal-based direct reduction, Sponge iron, Lime, Magnetic separation 60 71 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-973-2&slc_lang=en&sid=1 N. Alavifard naghdali.alavi@gmail.com 180031947532846004123 180031947532846004123 No Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad H. Shalchian h.shalchian@stu.um.ac.ir 180031947532846004124 180031947532846004124 Yes Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad A. Rafsanjani-Abbasi ali.rafsanjani@gmail.com 180031947532846004125 180031947532846004125 No Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad J. Vahdati Khaki vahdati@um.ac.ir 180031947532846004126 180031947532846004126 No Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad A. Babakhani babakhani@um.ac.ir 180031947532846004127 180031947532846004127 No Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad