کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
212355 462046 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visualization of flow behavior during bioleaching of waste rock dumps under saturated and unsaturated conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Visualization of flow behavior during bioleaching of waste rock dumps under saturated and unsaturated conditions
چکیده انگلیسی

A simulation framework is outlined for the analysis of the saturated and unsaturated flow behaviors within a waste rock dump. The traditional inherent “black-box” approach for treating waste rock dumps has resulted in generalizations that sometimes prove inaccurate. The hydrodynamics play an important role in terms of leaching reaction kinetics, heat and solute transport. The coexistence of saturated and unsaturated flows within the dump makes the flow behavior complicated. In this study, X-ray CT (SOMATOM Sensation 16) was used to obtain the real pore structure of the packed waste rocks. The meso-scale saturated flow process was visualized through solving the governing equation by the COMSOL Multiphysics software. The velocity field depends strongly on the distribution of channels, pore connectivity and curvature. The macro-scale unsaturated velocity field within the dump was obtained. The information drawn from this model can be used to improve the understanding of the hydrodynamics within waste rock dumps.


► X-ray CT was used to obtain the real pore structure of the paced waste rocks.
► The meso-scale saturated flow process between the particles was visualized.
► The macro-scale unsaturated velocity field within the dump was obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 133, February 2013, Pages 1–6
نویسندگان
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