پرعیارسازی نمونه هماتیتی کم‌عیار به روش‌های ثقلی و مغناطیسی (مطالعه موردی: خاک سرخ معدن ساحل)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی معدن، دانشگاه تهران، تهران، ایران

2 گروه مهندسی معدن، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران

10.22034/anm.2025.22874.1669

چکیده

در این تحقیق، فرآوری نمونه کانسنگ خاک سرخ منطقه غرب بندرعباس موردبررسی قرار گرفت. مطالعات کانی­شناسی نشان داد کانی­های آهن­دار نمونه شامل هماتیت و گوتیت بوده و کوارتز و کلسیت عمده کانی­های باطله را تشکیل می­دهند. نتایج آنالیز شیمیایی تیتراسیون نشان داد که عیار هماتیت در نمونه حاضر 71/44 درصد هماتیت (3/31 درصد آهن) است و هدف رسیدن به عیار بالای 55-56 درصد هماتیت است. جهت فرآوری و کاهش کانی­های باطله، آزمایش­های ثقلی میز لرزان، آزمایش‌های مغناطیسی تر و خشک شدت و گرادیان بالا بر روی نمونه صورت پذیرفت. در انجام آزمایش­های میز لرزان از روند طراحی آزمایش­ها به روش فاکتوریل کامل استفاده شد و تأثیر پارامتر­های شیب، دبی آب شستشو و آب خوراک بر عیار و بازیابی کنسانتره موردبررسی قرار گرفت. برای آزمایش­های میز لرزان که برای ابعاد درشت­تر از 150 میکرون انجام شد، در بهترین شرایط با دبی آب خوراک 8 لیتر در دقیقه، شیب 8 درجه و آب شستشو 5/11 لیتر در دقیقه محصولی با عیار 87/55 درصد هماتیت و بازیابی 25/63 درصد به دست آمد که از آن می­توان به‌عنوان روش پیش­ فرآوری استفاده نمود. جدایش مغناطیسی خشک گرادیان بالا پس از نرمه­گیری نمونه خوراک اولیه، در محدوده ابعادی 1000+2380- میکرون، محصولی با عیار 6/57 درصد هماتیت و بازیابی 11/95 درصد و در محدوده 150+1000- میکرون نیز محصولی با عیار 34/64 درصد هماتیت و بازیابی 14/75 درصد را حاصل نمود. در آزمایش­های جدایش مغناطیسی تر شدت بالا نمونه خوراک اولیه نیز نهایتاً محصولی با عیار 53/57 درصد هماتیت و بازیابی 9/64 درصد به دست آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Enrichment of low-grade Hematite sample by gravity and magnetic methods (Case study: Red soil of Sahel mine)

نویسندگان [English]

  • Seyed Hamzeh Amiri 1
  • Marzieh Hosseini Nasab 2
  • Mohammad Noaparast 1
  • Seyyed Ziaodin Shafaei 1
1 Dept. of Mining Engineering, University of Tehran, Tehran, Iran
2 Dept. of Mining Engineering, University of Sistan and Baluchestan, Zahedan, Iran
چکیده [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]

  • Red soil
  • Hematite
  • Shaking Table
  • Magnetic Separation
  • Full factorial
[1]                 Chatterjee, K., 2009, "Uses of Industrial Minerals and Rocks and Freshwater", Nova Science Publishers Inc., New York.
[2]                 Potter, M. J., 2010, "2007 Minerals yearbook, Iron oxide pigments", U.S., Geological Survey.
[3]                 Karimpour, M., 2006, "Industrial Minerals and Stones", Ferdowsi University of Mashhad, 398 p. [In Persian]
[4]                 Chatterjee, k., 2007, "Uses of metals and metallic minerals", New Age International Publishers, New Delhi.
[5]                 Farahmandpour, Sh., 2005, "Ochre and its application in the dye industry", Master's thesis, Supervisor: Dr. Faranak Feyzi, Mining Engineering Department, Islamic Azad University, South Tehran Branch. [In Persian]
[6]                 Jafarzadeh, A., Ghorbani, M., Pezeshkpour, M., 1995, "Geology of Iran: Iron Deposits", Ministry of Industries and Mines Publications, Geology and Mineral Exploration Organization of the Country, 213 pages. [In Persian]
[7]                 Renaud, K. M., 2023, "2017-2018 Minerals Yearbook, india", U.S., Geological Survey.
[8]                 Ghosh, G. K., 2019, "Red and lateritic soils and agri-productivity: Issues and strategies", Journal of the Indian Society of Soil Science, 67(4), S104-S121.
[9]                 Harben, P. W., 1999, " The Industrial Minerals andybook: A Guide to Markets, Specifications, & Prices", Industrial Minerals Information, 296 pages.
[10]             "Hematite iron ore, from chemical formula to method of identification and application", Majd Steel, http://www.majdstel.com، 2025/06/03. [In Persian]
[11]             Cornell, R. M., Schwertmann, U., 2000, "The Iron Oxides: Structure, Properties, Reactions, Occurrences and Uses", 1st edition, Wiley-chv.
[12]             Aydin, G., Sivrikaya, O., Sozeri, H., 2009, "Production of hematite concentrate from low grade hematite ores", Proceeding of the XIII Balkan mineral processing congress, 466-469.
[13]             Liu, C. S., Li, J. S., Tang, H. Y., Gao, Y. W., 2014, "Research on mineral processing for high silica low grade hematite ore in Xinjiang", Ironmaking & Steelmaking, 41(7), 481-485.
[14]             Behnamfard, A., Khaphaje, E., 2019, "Characterization of Sangan low-grade iron ore and its processing by dry low-intensity magnetic separation", International Journal of Mining and Geo-Engineering, 53(2), 111-116.
[15]             Akbari, H., Noaparast, M., Shefaei Tonekaboni, Z., Hajati, A., 2016, "Gravity enrichment of hematite sample from Tang-Zagh mine by shaking table using Box-Behnken experimental design model", 10th Mining Engineering Student Conference, Kashan. [In Persian]
[16]             Kong, H., Zhou, T., Yang,, X., Gong Y., Zhang, M., Yang, H., 2022, "Iron recovery technology of red mud—a review", Energies, 15(10), 3830.
[17]             Jiang, L., Liu P., Yang, X., Zhang, Y., Li, F., 2019, "Comparative Classification Studies of Red Mud by Using Hydrocyclones", Miner. Eng., 131, 124–130.
[18]             Jamieson, E., Jones, A., Cooling, D., Stockton, N., 2006, "Magnetic Separation of Red Sand to Produce Value", Miner. Eng., 19, 1603–1605.
[19]             Li, W., Han, Y., Liu, X., Shan, Y., Li, Y., 2019, "Effect of Fluidized Magnetizing Roasting on Iron Recovery and Transformation of Weakly Magnetic Iron Mineral Phase in Iron Tailings", Physicochem. Probl. Miner. Process., 55, 906–916.
[20]             Li, Y., Wang, J., Wang, X., Wang, B., Luan, Z., 2011, "Feasibility Study of Iron Mineral Separation from Red Mud by High Gradient Superconducting Magnetic Separation", Phys. C Supercond, vol. 471, issue 3-4, pp. 91–96.
[21]             Navi, N., Karamoozian, M., Khani, M. R., 2023, "Recovery of Iron from Bauxite Red Mud by Reduction Roasting Method", Journal of Mining and Environment, 14(4), 1295-1305.
[22]             Chen, R., Shi, L., Huang, H., Yuan, J., 2023, "Extraction of iron and alumina from red mud with a non-harmful magnetization sintering process", Minerals, 13(3), 452.
[23]             Xiao, J., Zou, K., Zhong, N., Gao, D., 2023, "Selective separation of iron and scandium from Bayer Sc-bearing red mud", Journal of Rare Earths, 41(7), 1099-1107.
[24]             Xiao, J., Zhong, N., Gao, D., Zou, K., Wang, Z., Huang, W., Xiong, W., 2022, "An efficient process to recover iron from Bayer red mud", JOM, 74(8), 3172-3180.
[25]             Wang, K., Dou, Z., Liu, Y., Li, X., Lv, G., Zhang, T. A., 2022, "Summary of research progress on separation and extraction of valuable metals from Bayer red mud", Environmental Science and Pollution Research, 29(60), 89834-89852.
[26]             Abolpour, B., Abbaslou, H., Balvardi, M., 2022, "Enrichment of hematite iron mineral by reduction method and investigation of its properties", Fifth National Congress of Chemistry and Nanochemistry from Research to Technology, Tehran, Iran. [In Persian]
[27]             Su, W., Tan, X., Wang, Z., 2024, "Critical applications of scandium and progress in the extraction of different scandium resources", In E3S Web of Conferences (Vol. 520, p. 03001), EDP Sciences.
[28]             Yu, Q., Jin, Y., Lu, S., Ma, D., 2024, "Recent Research on Recovery of Iron and Aluminium from Bauxite Residue in China", TRAVAUX 53, Proceedings of the 42nd International ICSOBA Conference, Lyon, 27 - 31 Oct. 2024, pp. 701-710.
[29]             Fariss, A. H. B., Ibrahim, A. I. I., Ozdemir, A. C., Top, S., Kursunoglu, S., Altiner, M., 2025, "Beneficiation of Low-Grade Iron Ore Using a Dry-Roll Magnetic Separator and its Modeling via Artificial Neural Network", Journal of Sustainable Metallurgy, 1-17.
[30]             Nematollahi, H., 2003, "Mineral processing", Tehran University Press, third edition, 432 p. [In Persian]
[31]             Duckworth, W. E., 1968, "Statistical techniques in technological research: An aid to research productivity", London, Methuen.
[32]             Song, S., 2002, "Magnetite separation of Hematite and Limonite Fines as Hydrophobic Flocs fromIron Ores", Mineral Engineering, vol. 15, issue 6, pp. 415-422.