اندازه گیری پایداری کف در سلول فلوتاسیون و بررسی تاثیر عوامل موثر بر آن

نوع مقاله : علمی-پژوهشی

نویسندگان

1 دکترا، دانشکده معدن و متالورژی، دانشگاه یزد، یزد

2 سازمان توسعه و نوسازی معادن و صنایع معدنی ایران، تهران

3 استادیار، دانشکده معدن و متالورژی، دانشگاه یزد، یزد

4 دانشیار، آزمایشگاه منابع زمین، دانشگاه لورین، فرانسه

5 دانشیار، دانشکده معدن و متالورژی، دانشگاه یزد، یزد

6 کارشناسی ارشد، دانشگاه آزاد اسلامی واحد گلپایگان، گلپایگان

چکیده

پایداری کف با توجه به اینکه در فرآیند فلوتاسیون تاثیر قابل توجهی دارد، اهمیت خاصی دارد و عوامل مختلفی ممکن است بر آن تاثیر داشته باشد. از جمله عوامل موثر بر پایداری کف سرعت ظاهری هوا، غلظت کلکتور، غلظت کف ساز و اندازه ذرات نمونه است که در این مقاله عوامل یاد شده برای فلوتاسیون کانی‌های سولفیدی کنسانتره سنگ آهن بررسی شد. پایداری کف با توجه به تشکیل و از بین رفتن کف تعیین می‌شود و برای این منظور از زمان ماند کف (یا حداکثر ارتفاع کف ایجاد شده) و نیمه عمر کف استفاده شد. نتایج نشان داد، افزایش سرعت ظاهری هوا، افزایش غلظت کلکتور و کف‌ساز در پایداری کف تاثیر مثبتی دارد، به طوری که با افزایش غلظت کف‌ساز از 60 به 140 گرم بر لیتر، زمان ماند کف و نیمه عمر کف به ترتیب 92 و 71 درصد افزایش یافت. اندازه ذرات نمونه رفتار متفاوت در تشکیل و فروپاشی کف داشت به طوری با کاهش اندازه d50 ذرات، حداکثر ارتفاع کف افزایش ولی نیمه عمر کف کاهش یافت.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Measurement of Froth Stability in Flotation Cells and Investigation of the Impact of Factors Affecting It

نویسندگان [English]

  • M. Ostadrahimi 1 2
  • Kh. Gharibi 3
  • S. Farrokhpay 4
  • A. Dehghani 5
  • M.R. Ostadrahimi 6
1 Ph.D, Dept. of Mining & Metallurgical Engineering, University of Yazd, Yazd, Iran|Iranian Mines & Mining Industries Development & Renovation Organization (IMIDRO), Tehran, Iran
2 Ph.D, Dept. of Mining & Metallurgical Engineering, University of Yazd, Yazd, Iran|Iranian Mines & Mining Industries Development & Renovation Organization (IMIDRO), Tehran, Iran
3 Assistant Professor, Dept. of Mining & Metallurgical Engineering, University of Yazd, Yazd, Iran
4 Associate Professor, GeoRessources, University of Lorraine, 54505 Nancy, France
5 Associate Professor, Dept. of Mining & Metallurgical Engineering, University of Yazd, Yazd, Iran
6 M.Sc, Dept. of Mining, Islamic Azad University of Golpayegan, Isfahan, Iran
چکیده [English]

Froth stability is of particular importance and  has a significant impact on the flotation process. Froth stability can be defined based on the formation of froth (maximum froth height or froth retention time) or the froth decay (froth half-life). Froth stability is influenced by various factors such as the superficial air velocity (Jg), the collector dosage (CC), frother dosage (FC) and the sample particle size (d50). In this work the effects of these factors were examined. The results showed that increasing the Jg, the CC and the FC will increae the froth stability. For example, by increasing the FC from 60 to 140 g/liter, the froth retention time (FRT) and the half-life froth (t1/2) increased by 92% and 71%, respectively. Sample particle size behaved differently in froth formation and decay, so that by reducing the d50, the froth retention time increased but the froth half-life decreased.

کلیدواژه‌ها [English]

  • Froth stability
  • Gas velocity
  • Collector dosage
  • Frother dosage
  • Sample particle size (d50)

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سابقه مقاله

  • تاریخ دریافت: 18 آذر 1399
  • تاریخ بازنگری: 31 خرداد 1400
  • تاریخ پذیرش: 14 تیر 1400

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