نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی معدن، دانشگاه تهران
2 گروه مهندسی معدن، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this research, concentration of red soil ore located in Bandar Abbas west was investigated. Mineralogical studies showed that iron minerals in sample contain Hematite and Goethite, Calcite and Quartz are main part of gangue minerals. According to chemical assaying, the average iron grade of ore was 44.71% Hematite (31.3% Fe) and our aim is achieve to grade above 55% Hematite. Gravity (Shaking Table), Wet High-Intensity Magnetic Separation, and Dry High-Gradient Magnetic Separation tests were carried out on sample for concentration and reducing gangue minerals. The tests of Shaking Table were designed by use of full factorial method and effect of dip, cleaning water and feed water flow rates were investigated. For Shaking Table tests in size fraction +150 microns with feed water flow rate 8 l/min, dip 8o and wash water flow rate 11.5 l/min –regarding as best performance condition- concentration assay and recovery were 55.87% Hematite and 63.25% respectively and it can be used for pre-concentration. According to assay distribution after feed disliming, Dry High-Gradient Magnetic Separation for two-size fraction -2380+1000 and -1000+150 microns was used. For size fraction of -2380+1000 microns concentration assay and relative recovery were 57.6% Hematite and 95.11% respectively and for size fraction -1000+150 microns concentration assay and relative recovery were 64.34% Fe2O3 and 75.14% respectively. For Wet High-Intensity Magnetic Separation, concentration assay and relative recovery were 57.53% Hematite and 64.9% respectively. Also after using more tests related to Wet High-Intensity Magnetic Separation and applying two cleaner stages, concentration grade reach to 80.17% Hematite.
کلیدواژهها [English]
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