en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <b><i><font face="TimesNewRomanPS-BoldItalicMT" size="1"><font face="TimesNewRomanPS-BoldItalicMT" size="1"><p align="left">Abstract: </p><p align="left">the changes of BET surface area of a mineral substance during intensive grinding process. Validity of the proposed</p><p align="left">model was tested by the experiments performed using a natural chalcopyrite mineral as well as the published data. It</p><p align="left">was shown that the model can predict the experimental results with a very good accuracy and can be used to predict</p><p align="left">what may happen under the similar experimental conditions.</p></font></font><font face="TimesNewRomanPS-ItalicMT" size="1"><font face="TimesNewRomanPS-ItalicMT" size="1">Based on experimental observations, a model has been developed to describe the effect of grinding time on</font></font></i></b> Keywords: Modeling, Minerals, Chalcopyrite, Ball milling, Specific surface area 30 36 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3-106&slc_lang=en&sid=1 A. H. Emami 18003194753284600829 18003194753284600829 No M. Sh. Bafghi msbafghi@iust.ac.ir 18003194753284600868 18003194753284600868 Yes J. Vahdati Khaki 18003194753284600869 18003194753284600869 No A. Zakeri 18003194753284600870 18003194753284600870 No