Akademik Veri Yönetim Sistemi
ENERGY EDUCATION SCIENCE AND TECHNOLOGY PART A-ENERGY SCIENCE AND RESEARCH, cilt.25, ss.17-29, 2010 (SCI-Expanded)
Sintering operation in the production of Zn, Cd, and Pb by Waelz process produces a powdery waste containing mainly (about 70%) ZnO, CdO, and PbO. The waste may be referred to as Waelz sintering waste (WSW). The aim of this study is to develop a process for the separation and recovery of the metals from WSW with high purities. The process is based on the dissolution of the WSW in aqueous (NH4)(2)SO4 Solution. Taguchi method was applied to determine the optimum conditions of dissolution of metals in Waelz sintering waste (WSW) (NH4)(2)SO4 solutions. The research reported here concentrated on the effect of some important operational parameters on dissolution process. The parameters investigated and their ranges were as follows: (NH4)(2)SO4 concentration (C); 1-4 M, stirring speed (W); 400-900 rpm, reaction temperature (7); 15-65 degrees C, reaction time (t); 3-20 min, and solid-liquid ratio (S/L); 0.3-0.05 g/ml. The best dissolution conditions for Zn were found to be C = 2 M, W = 400 rpm, t = 6 min, T=65 degrees C, and S/L = 0.05 g/ml. The best dissolution conditions for Cd were found to be C = 2 M, W = 800 rpm, t = 6 rnin, T=25 degrees C, and S/L = 0.05 g/ml.