Optimization and kinetics study of zinc extraction from zinc containing leaching residue in sulfuric acid solution
Publish place: دومین کنفرانس بین المللی علوم و مهندسی
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
View: 426
This Paper With 15 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ICESCON02_120
تاریخ نمایه سازی: 16 شهریور 1395
Abstract:
In this paper, the acidic leaching kinetics of the leach residue containing 6.5% Zn, 3.5% Pb and 2.5 % Fe in sulfuric acid solution was studied. Leaching temperature, holding time, liquid-solid ratio (volume/weight) (L/S), stirring speed and pH (sulfuric acid concentration) were determined as an affecting parameter on the leaching process. The Central Composite Design (CCD) was used for the experimental plan with the five variables (parameters) on Zn recovery. The leaching recovery of Zn was checked through experiments. Statistical analysis confirms the optimum conditions obtained by the experimental results. The 85 % of Zn was obtained under optimal condition: leaching temperature 70 ˚C, holding time 90 min, liquid-solid ratio 10:1, stirring speed 750 rpm and pH = 2. It was found that leaching kinetics follows the kinetic law of shrinking-core model. The results show that diffusion through product layer is the leaching kinetics rate controlling step. The calculated apparent activation energy of the process is 10 k j/mole, which is characteristic for a diffusion- controlled process.
Keywords:
Authors
Diako Fatahi
MSc of Mineral Processing Engineering, Faculty of Engineering, University of Kashan, Iran
Ali A.abdollahzadeh
Assistant Professor , Department of Mining Engineering, University of Kashan & Amir Kabir University of Technology, Iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :