[1]Department of Materials Science & Nanotectmology Engineering;
Abdullah Gul University;
Kayseri 38100;
Turkey;
[2]Department of Metallurgical Engineering;
Faculty of Mining and Petroletml Engineering;
Institut Tetnologi Bandung;
Bandung 40132;
Indonesia;
[3]Division of Mineral Processiilg;
Department of Mining Engineering;
Esldsetfir Osmangazi University;
Eskisetfir 26480;
Turkey;