کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9632991 | 1425869 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The selective aggregation and separation of titania from a mixed suspension of silica and titania
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The separation of fine-grained titania from silica is an important industrial problem as the demand for titania continues. In this study we demonstrate how high-purity, synthetic, micron and sub-micron silica and titania particles may be separated by selective aggregation from an aqueous suspension. Specific electrolyte concentration and suspension pH were chosen through a colloid stability analysis. High-efficiency (up to 99.6 wt.%) separation of titania from a mixed silica-titania suspension (50%Â :Â 50%) was achieved over a wide range of solid concentrations (0.03-2 wt.%) with an electrolyte concentration of 20 mM at pH 8. Analysis of the data revealed that separation efficiency improved as the solid concentration increased. The latter behaviour was attributed to a transition from 'free' to hindered settling of the flocs, which impacted on the entrapment of silica particles within titania flocs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mineral Processing - Volume 78, Issue 1, 15 December 2005, Pages 1-10
Journal: International Journal of Mineral Processing - Volume 78, Issue 1, 15 December 2005, Pages 1-10
نویسندگان
David R.E. Snoswell, Jinming Duan, Daniel Fornasiero, John Ralston,