توسعه شمای عملیات فرآوری کانسنگ‌های کم عیار منگنز با روش های فیزیکی و فیزیکو شیمیایی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی معدن، دانشگاه صنعتی امیر کبیر، تهران، ایران.

2 دانشکده مهندسی ، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

در این تحقیق انواع روش‌های پرعیارسازی، به منظور دستیابی به فلوشیتی مناسب برای پرعیارسازی کانسنگ کم عیار منگنز مورد بررسی و مقایسه قرار گرفته است. نمونه کانسنگ مورد استفاده دارای عیار اولیه 13/8% MnO است. کانی با ارزش حاوی منگنز، پیرولوزیت بوده و کلسیت به عنوان کانی گانگ اصلی موجود در آن  است. روش‌های پرعیار سازی ثقلی (جیگ و میز لرزان)، مغناطیسی شدت بالا و فلوتاسیون (کاتیونی و آنیونی)، روش‌های مورد استفاده در این بررسی بوده‌اند. در میان روش‌های مورد استفاده، فلوتاسیون کاتیونی، دارای بالاترین بازیابی منگنز در کنسانتره (77/4%) و اندیس انتخابی (34/2) بوده است. بالاترین عیار منگنز در کنسانتره برابر 53/5 %  بوده که با استفاده از روش مغناطیسی شدت بالا بدست آمده است و  این روش دارای بالاترین کارایی جدایش (54/16%) نیز می باشد. برای توسعه فلوشیت از ترکیب روش‌های ثقلی- فلوتاسیون (کاتیونی و آنیونی)، مغناطیسی- ثقلی و ثقلی_ ثقلی استفاده شده است. در بین روش های ترکیبی مورد استفاده، ترکیب روش‌های میز لرزان با روش فلوتاسیون کاتیونی منجر به کنسانتره‌ای با عیار و بازیابی به ترتیب 39/9% و 71/5 % شده است که برای توسعه در مقیاس صنعتی مناسب‌‌تر به نظر می رسد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Flowsheet development for low-grade manganese ores by physical and physicochemical methods

نویسندگان [English]

  • shima rahimi 1
  • Mehdi Irannajad 1
  • Akbar Mehdilo 2
1 Amirkabir University of Technology, Department of Mining Engineering, Tehran, Iran.
2 Faculty of Engineering University of Mohaghegh Ardabili Ardabil Iran
چکیده [English]

In this research, to achieve an appropriate flowsheet for the processing of low-grade manganese ore, some kinds of beneficiation methods have been investigated and compared. The used ore sample contains an average grade of 13.8% MnO. The valuable mineral containing manganese is pyrolusite, and calcite is the main gangue mineral in the ore. Gravity (jigging and tabling), high-intensity magnetic, and flotation (cationic and anionic) methods were examined in this study. Among the applied methods, cationic flotation has the highest manganese recovery in the concentrate (77.4%) with a selectivity index of 2.34. The highest grade of MnO in the concentrate is 52.6% with a selectivity index of 4.10, which is obtained using high-intensity wet magnetic separation. The highest separation efficiency (almost 54.2%) is also achieved by this method. For developing a suitable flowsheet, the combination of various methods including gravity-flotation (cationic and anionic), gravity-magnetic, and gravity-gravity was examined. Among the combined methods, the combination of tabling and cationic flotation methods has resulted in a concentrate containing 39.9% MnO with an acceptable recovery of 71.5%, which seems a more suitable flowsheet for development on the industrial scale.

کلیدواژه‌ها [English]

  • Manganese
  • Pyrolusite
  • Beneficiation
  • Flowsheet
  • Gravity separation
  • Magnetic separation
  • Flotation
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