کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212495 462051 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of oxidizing agents on the hydrometallurgical purification of metallurgical grade silicon
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of oxidizing agents on the hydrometallurgical purification of metallurgical grade silicon
چکیده انگلیسی

The effects of two different oxidizing agents viz. ferric chloride and ammonium persulfate on the purification of metallurgical grade silicon (MGSi) by leaching with hydrochloric acid were investigated as a function of temperature, particle size and hydrochloric acid concentration. It was found that the addition of oxidizing agent improved the extraction of impurities from the MGSi as compared to that in the absence of any oxidizing agent. The extraction of impurities from the MGSi increased with a decrease in particle size and increase in temperature and hydrochloric acid concentration. By leaching MGSi with 10 M hydrochloric acid in the presence of 0.1 M ferric chloride and at 90 °C a maximum of 66% Ca, 92% Cr, 27% Fe, 98% Cu, 98% Ni and 89% Zn were removed. The unleachable Si-Fe and Si-Fe-Ti phases in the grain boundaries of MGSi hindered the extraction of Fe and Ti.

Figure optionsDownload as PowerPoint slideHighlights
► Hydrometallurgical purification of metallurgical grade silicon was studied.
► Ferric chloride and ammonium persulfate were used as oxidizing agents.
► Extraction of impurities improved in the presence of oxidizing agent.
► Decrease in particle size and increase in temperature improved purification of MGSi.
► Si-Fe and Si-Fe-Ti phases at grain boundaries hindered extraction of Fe and Ti.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volumes 121–124, June 2012, Pages 120–125
نویسندگان
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