Development of a Kinetic Model for Predicting the Dissolution Behavior of Activated Molybdenite by Mechanical Activation

مهندسی متالورژی و مواد

Article 1, Volume 32, Issue 1 - Serial Number 23, June 2021, Pages 1-18   

Document Type: Original Articles

DOI: 10.22067/ma.v31i1.69842

Authors

Hossein Shalchian^{* 1}; Hadi Nasiri²; Abolfazl Babakhani¹; Masumeh Torabi Parizi³

¹Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad.

²عضو هیات علمی گروه مهندسی مواد و متالورژی

³Research and Development Division, Sarcheshmeh Copper Complex, Kerman, Iran.

Abstract

In this research, leaching kinetic of activated molybdenite was studied. Mechanical activation of molybdenite concentrate was carried out at different conditions of milling and presence of alumina. Leaching experiments were performed in nitric acid media. The classic shrinking core model was modified, in order to study the leaching kinetic of activated molybdenite. The model was developed step by step. Finally, a comprehensive model was obtained which contains the effect of important parameters on the leaching rate of activated molybdenite. The calculated values of activation energy revealed that the activated molybdenite without additive is more reactive with the minimum of 20% and 56% reduction in activation energy value after 4 and 24 hours of milling, respectively.  The minimum of 3% and 6% reduction in activation energy value was obtained for the activated molybdenite in presence of alumina after 2 and 12 hours of milling, respectively.

Keywords

Molybdenite; Mechanical Activation; Leaching; Kinetic; Modeling

Supplementary Files

1-Shalchian-edited.pdf

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