کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7044059 | 1456926 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Separation of As from high As-Sb dust using Fe2O3 as a fixative under O2-N2 atmosphere
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A novel method to separate As from high As-Sb dust using Fe2O3 as a fixative under an O2-N2 atmosphere is proposed. Here, Sb is oxidised and converted to Sb2O4 and FeSbO4 that remain in the roasted residue, and As is volatilized in the form of As4O6. The Sb2O3 can be selectively oxidised from the dust by using 21â¯vol% O2, but the formation of amorphous substance (As-Sb-O) hinders the effective separation of As and Sb. Adding Fe2O3 hinders the amorphous substance formation and destroys the structure of the solid solution ((Sb, As)2O3) in the raw material by converting the Sb component in it to FeSbO4. Therefore, the volatilization rates of As and Sb can reach up to 90.53% and only 13.20%, respectively at a roasting temperature of 723â¯K, roasting time of 90â¯min, an Fe2O3 dosage of 15 mass%, and O2 content of 21â¯vol%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 194, 3 April 2018, Pages 81-88
Journal: Separation and Purification Technology - Volume 194, 3 April 2018, Pages 81-88
نویسندگان
Cheng Tan, Lei Li, Kongzhai Li, Dapeng Zhong,