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

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

مراجع

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سابقه مقاله

  • تاریخ دریافت: 30 مرداد 1396
  • تاریخ بازنگری: 27 فروردین 1398
  • تاریخ پذیرش: 03 اردیبهشت 1398

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