کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9623707 | 456567 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dissolution kinetics of sphalerite in acidic ferric chloride leaching
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper presents a study for leaching kinetics of sphalerite concentrate in FeCl3-HCl solution. The shrinking core model was applied to the results of experiments investigating the effects of stirrer speed of 200-600 rpm, ferric ion concentration in range of 0-1 M, solid/liquid ratio in range of 1/100-1/5, leaching temperature range of 40-80 °C and particle size on zinc dissolution rate. The activation energy for the leaching process was found to be 45.30 kJ/mol and the Arrhenius constant was calculated to be 5.454 sâ1. The order of reaction for ferric ion concentration, solid/liquid ratio and particle size were also obtained. The rate of the reaction based on reaction-controlled process can be expressed as,[1â(1âα)1/3]=k0(Fe3+)0.36(ÏS/L)â0.33r0â0.97exp(â45300/RT)t.The dissolution of sphalerite with acidic ferric chloride solution was found to be controlled by reaction-controlled process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 114, Issues 1â3, 15 November 2005, Pages 67-72
Journal: Chemical Engineering Journal - Volume 114, Issues 1â3, 15 November 2005, Pages 67-72
نویسندگان
S. Aydogan, A. Aras, M. Canbazoglu,