مقایسه عملکرد فلوتاسیون ستونی و مکانیکی در سولفورزدایی از کنسانتره سنگ آهن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی معدن و متالورژی، دانشگاه صنعتی امیرکبیر، تهران

2 دانشکده فنی و مهندسی، دانشگاه تربیت مدرس، تهران

10.22084/nfag.2019.14403.1270

چکیده

در سال‌های اخیر، جایگزینی سلول‌های فلوتاسیون مکانیکی با ستون‌های فلوتاسیون به منظور حذف ناخالصی‌ها، مورد توجه محققان و صنایع فرآوری آهن قرار گرفته است. هدف از تحقیق حاضر، مقایسه عملکرد سلول‌های مکانیکی و ستونی در سولفورزدایی از کنسانتره جداکننده‌های مغناطیسی مجتمع سنگ آهن گل‌گهر است. استفاده فلوتاسیون ستونی در شرایط بهینه، منجر به کاهش قابل توجه سولفور شد، به طوری که کنسانتره نهایی با عیار سولفور کمتر از 1/0 درصد با بازیابی آهن بالای 98 درصد حاصل شد. نتایج مقایسه آزمایش فلوتاسیون ستونی و مکانیکی نشان داد که، سلول ستونی از عملکرد متالورژیکی بالاتری برای تولید کنسانتره آهن با محتوی سولفور مناسب برخوردار است به طوری که کارایی جدایش سولفور در فلوتاسیون ستونی، در حدود 7 % بالاتر از سلول‌های مکانیکی به دست آمد. در عین حال میزان هدرروی آهن غیر پیریتی در فلوتاسیون ستونی کمتر از سلول مکانیکی است.

کلیدواژه‌ها


عنوان مقاله [English]

Comparison of conventional and column flotation performance for desulfurization of iron ore concentrate

نویسندگان [English]

  • F. Nakhaei 1
  • M. Irannajad 1
  • S. Mohammadnejad 2
چکیده [English]

The content of sulfur in iron ore concentrate is the major problem of steel making industries. In this regard, the reverse flotation operation is used to reduce the amount of sulfur of the final concentrate. Recently, the substitution of mechanical flotation cells with flotation columns for the sake of impurities removal has been highly taken into consideration. The purpose of this study is comparing the performance of mechanical and column cells in desulphurization of Gole Gohar iron ore complex magnetic separators concentrate. Using column flotation in an optimal condition led to the remarkable reduction of sulfur so that the final concentrate with the sulfur grade lower than 0.1 % and iron recovery over 98% was obtained. The results comparison of column and mechanical flotation have showed that the column cell outperformed the metallurgical performance for producing iron concentrate consisting of low sulfur content. Sulfur separation efficiency in column flotation was almost 7% higher than that of the mechanical cells, meanwhile, the wasting rate of non- pyrite iron in column flotation is less than that of the mechanical cells.

کلیدواژه‌ها [English]

  • Iron ore
  • Gole Gohar
  • Flotation column
  • Mechanical cells
  • Desulfurization

Al-Fariss, T. F., Abd El-Aleem, F. A., El-Nagdy, K. A (2013) Beneficiation of Saudi phosphate ores by column flotation technology. Journal of King Saud University – Engineering Sciences, 25: 113–117.

Al-Fariss, T. F., Al-Zahrani, S. M., Abd El-Aleem, F. A., El-Nagdy K. A (2011) Removal of carbonate minerals from Saudi phosphate by reverse flotation process. 6th International Conference on Phosphate Beneficiation, March 6–11, Kun Ming, China.

Araujo, A. C., Viana, P. R. M., Peres, A. E. C )2005( Reagents in iron ores flotation. Mineral Engineering, 18: 219–224.

Bulatovic, S. M (2007) Handbook of Flotation Reagents: Chemistry, Theory and Practice. Amsterdam: Elsevier, Internet resource.

Cho, Y. S. and Laskowski, J. S (2002) Effect of flotation frothers on bubble size and foam stability. International Journal of Mineral Processing, 64: 69-80.

Crabtree, E.H., Vincent, J. D (1962) Historical outline of major flotation developments. 50th Anniversary, Ed. D.W. Fuerstenau. New York: American Institute of Mining, Metallurgical and Petroleum Engineering Inc.

Dell, C. C., and Jenkins, B.W (1976) The Leeds Flotation Column. 7th International Coal Preparation Congress, Sydney, Australia.

El-Shall, H., Zhang, P., Snow, R (1996) Comparative analysis of dolomite-francolite flotation techniques. Minerals and Metallurgical Processing, 13: 135–139.

Filippov, L. O., Severov, V. V., Filippova, I. V (2014) An overview of the beneficiation of iron ores via reverse cationic flotation. International Journal of Mineral Processing, 127: 62–69.

Finch, J. A., Dobby, G. S (1990) Column Flotation. Pergamon Press, Oxford.

Flint, I. M., MacPhail, P. and Dobby, G. S (1988) Aerosol frother addition in column flotation, CIM Bull., 81: 81-90.

Hacifazlioglu, H. and Sutcu, H (2007) Optimization of some parameters in column flotation and a comparison of conventional cell and column cell in terms of flotation performance. Journal of the Chinese Institute of Chemical Engineer, 38: 287–293.

Irannajad, M., Nakhaei, F., Mohammadnejad, S (2018) Correlation between column flotation froth image features in respect to operational variables. Journal of Research-Papers Mineral Resources Engineering, 3 (1): 59-76.

Jameson, G. J (1988) A new concept in flotation column design. Sastry, K. V. S. (Ed.), Column Flotation’ 88: International Symposium on Column Flotation, SME, Phoenix Arizona, 281.

Jiang, C. L., Wang, X. H., Parekh, B. K. and Leonard, J. W (1998) The surface and solution chemistry of pyrite flotation with xanthate in the presence of iron ions. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 136 (1-2): 51-62.

Li, B., Tao, D., Ou, Z., and Liu, J (2003) Cyclo-Microbubble column flotation of fine coal. Separation Science and Technology, 38: 1125-1140.

Lutrell, G. H., Keyser, P. M., Adel, G. T., Yoon, R. H (1985) Improvements in recovery and selectivity with the microbubble flotation process, Second Annual Pittsburgh Coal Conference, Vol. 43, Pittsburg, Pennsylvania, U.S.A.

Ma, M (2012) Froth flotation of iron ores. International Journal of Mining Engineering and Mineral Processing, 1(2): 56-61.

Mavros, P., Kydros, K. A. and Matis, K. A (1993) Arsenopyrite enrichment by column flotation. Mineral Engineering, 6: 1265-1277.

Nakhaei, F., Irannajad, M (2017) Sulphur Removal of Iron Ore Tailings by Flotation. Journal of Dispersion Science and Technology, 38 (12): 1755-1763.

Nakhaei, F. and Irannajad, M (2017). Pyrite removal from iron ore concentrate by column flotation. Journal of Research-Papers Mineral Resources Engineering, 1(2): 1-11.

Nakhaei, F., Mosavi, M. R., Sam, A. Vaghei., Y (2012) Recovery and grade accurate prediction of pilot plant flotation column concentrate: neural network and statistical techniques. International Journal of Mineral Processing, 110–111: 140– 154.

Rath, S. S., Sahoo, H. S., Das, K., Das, B., Mishra, B. K (2014) Influence of band thickness of banded hematite quartzite (BHQ) ore in flotation. International Journal of Mineral Processing, 130: 48–55.

Reddy, P. R. S., Kumar, S. G., Bhattacharyya, K. K., Sastri, S. R. S. and Narasimhan, K. S (1988) Flotation column for fine coal benefication. International Journal of Mineral Processing, 24: 161-172.

Schneider, J. C. and Van, G. (1988) Design and operation of the hydrochem flotation column. Sastry, K. V. S. (Ed.), Column Flotation’88: International Symposium on Column Flotation, SME, Phoenix Arizona, 287.

Shrimali, K., Miller, J. D (2016) Polysaccharide depressants for the reverse flotation of iron ore. Transactions of the Indian Institute of Metals, 69(1): 83–95.

Tao, D., Luttrell, G. H. and Yoon, R. H (2000) A parametric study of froth stability and its effect on column flotation of fine particles. International Journal of Mineral Processing, 59: 25-43.

Thanasekaran, H., Kohmuench, J. and Christodoulou, L (2013) Column flotation of iron ore - Status and advances. Iron Ore, Western Australia, 1-14.

Viana, P. R. M., Silva, J. P., Rabelo, P. J. B., Coelho, A. G. and Silva, V. C (1991) Column flotation for the expansion of the flotation circuit at Samarco Mineracao. Column 91, Int. Conf. on Column Flotation, Sudbury, June 2-6.

Wheeler, D. A (1985) Column flotation: the original column, in froth flotation. Conference, Chile, Proc. 2nd Latin American Congress on Froth Flotation.

Yang, D. C (1988) A new packet column flotation system. Sastry, K. V. S. (Ed.), Column Flotation’88: International Symposium on Column Flotation, SME, Phoenix Arizona, 257.