International Journal of Minerals, Metallurgy and Materials, ( ISI ), Volume (23), No (4), Year (2016-4) , Pages (380-388)

Title : ( Mechanochemical leaching of chalcopyrite concentrate by sulfuric acid )

Authors: Farhad KhorramshahiMohammadAbad , Sina Hejazi , Jalil Vahdati Khaki , Abolfazl Babakhani ,

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This study aimed to introduce a new cost-effective methodology for increasing the leaching efficiency of chalcopyrite concentrates at ambient temperature and pressure. Mechanical activation was employed during the leaching (mechanochemical leaching) of chalcopyrite concentrates in a sulfuric acid medium at room temperature and atmospheric pressure. High energy ball milling process was used during the leaching to provide the mechanochemical leaching condition, and atomic absorption spectroscopy and cyclic voltammetry were used to determine the leaching behavior of chalcopyrite. Moreover, X-ray diffraction and scanning electron microscopy were used to characterize the chalcopyrite powder before and after leaching. The results demonstrated that mechanochemical leaching was effective; the xtraction of copper increased significantly and continuously. Although the leaching efficiency of chalcopyrite was very low at ambient temperature, the percentages of copper dissolved in the presence of hydrogen peroxide (H2O2) and ferric sulfate (Fe2(SO4)3) after 20 h of mechanochemical leaching reached 28% and 33%, respectively. Given the efficiency of the developed method and the facts that it does not require the use of an autoclave and can be conducted at room temperature and atmospheric pressure, it represents an economical and easy-to-use method for the leaching industry.

Keywords

, chalcopyrite, mechanical activation, mechanochemical leaching, sulfuric acid, cyclic
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@article{paperid:1055766,
author = {KhorramshahiMohammadAbad, Farhad and Sina Hejazi and Vahdati Khaki, Jalil and Babakhani, Abolfazl},
title = {Mechanochemical leaching of chalcopyrite concentrate by sulfuric acid},
journal = {International Journal of Minerals, Metallurgy and Materials},
year = {2016},
volume = {23},
number = {4},
month = {April},
issn = {1674-4799},
pages = {380--388},
numpages = {8},
keywords = {chalcopyrite; mechanical activation; mechanochemical leaching; sulfuric acid; cyclic voltammetry},
}

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%0 Journal Article
%T Mechanochemical leaching of chalcopyrite concentrate by sulfuric acid
%A KhorramshahiMohammadAbad, Farhad
%A Sina Hejazi
%A Vahdati Khaki, Jalil
%A Babakhani, Abolfazl
%J International Journal of Minerals, Metallurgy and Materials
%@ 1674-4799
%D 2016

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