1. Program of Postgraduate Studies in Mining, Metals and Materials Engineering (PPGE3M), Federal University of Rio Grande do Sul, Bento Gonçalves Avenue; 9500, 91501-970 Porto Alegre Rio Grande Brazil
2. Postgraduate Program in Process and Technology Engineering (PGEPROTEC), University of Caxias do Sul, Francisco Getúlio Vargas St., 1130, 95070-560 Caxias do Sul, RS, BrazilCaxias do Sul University (UCS)-CEP 95070-560 Caxias do Sul; Rio Grande Brazil