کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6673510 | 465347 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigations on different starches as depressants for iron ore flotation
ترجمه فارسی عنوان
تحقیقات در مورد نشاسته های مختلف به عنوان افسردگی برای تحویل سنگ آهن
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Four different starches, namely soluble starch, corn starch, potato starch and rice starch with different characteristics have been studied as depressants for hematite in cationic flotation using dodecylamine as the collector. Surface charge measurement and Fourier transform infrared spectroscopy (FTIR) have been used to understand the starch-hematite interaction. The lowering of surface charge and change of peaks at 750-1500Â cmâ1 region indicate the presence of hydrogen bonding and chemical interaction between hematite and starches. The results of flotation studies with pure minerals of hematite and quartz and a low grade iron ore at different conditions suggest that all the starches are good depressants for hematite. Maximum adsorption for all the four starches with hematite occurs at the pH value 5-9. However soluble starch is found to be the better depressant at slightly alkaline pH. The flotation of natural occurring banded iron ore using different starches has indicated that it is possible to achieve an iron grade of 63-65% Fe with 85-88% recovery.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Minerals Engineering - Volume 49, August 2013, Pages 1-6
Journal: Minerals Engineering - Volume 49, August 2013, Pages 1-6
نویسندگان
Bhagyalaxmi Kar, Hrushikesh Sahoo, Swagat S. Rath, B. Das,