کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1638172 1516984 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics of rare earth leaching from roasted ore of bastnaesite with sulfuric acid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Kinetics of rare earth leaching from roasted ore of bastnaesite with sulfuric acid
چکیده انگلیسی
Sulfuric acid leaching process was applied to extracting rare earth (RE) from roasted ore of Dechang bastnaesite in Sichuan, China. The effect of particle size, stirring speed, sulfuric acid concentration and leaching temperature on RE extraction efficiency was investigated, and the leaching kinetics of RE was analyzed. Under selected leaching conditions, including particle size (0.074-h0.100 mm), sulfuric acid concentration 1.50 mol/L, mass ratio of liquid to solid 8 and stirring speed 500 r/min, the leaching kinetics analysis shows that the reaction rate of leaching process is controlled by diffusion through the product/ash layer which can be described by the shrinking-core model, and the calculated activation energy of 9.977 kJ/mol is characteristic for a diffusion-controlled process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 23, Issue 3, March 2013, Pages 849-854
نویسندگان
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