Silver removal from molten lead through zinc powder injection

作     者：V.H.GUTIéRREZ-PéREZ A.CRUZ-RAMíREZ M.VARGAS-RAMíREZ E.PALACIOS-BEAS R.G.SáNCHEZ-ALVARADO V.H.GUTIRREZ-PREZ;A.CRUZ-RAMíREZ;M.VARGAS-RAMíREZ;E.PALACIOS-BEAS;R.G.SNCHEZ-ALVARADO

作者机构：ESIQIE Instituto Politécnico NacionalUPALM 07738 México D.F. México CIIM-UAEH Carretera Pachuca-Tulancingo Km 4.5 42084 PachucaHgo. México 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第2期

页      面：544-552页

核心收录：

学科分类：080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

主　　题：lead silver particle size powder injection residence time desilvering ratio 

摘      要：A silver removal process was carried out on a Pb-Ag alloy through zinc powder injection of three different sizes （3.55, 44.4 and 734.8μm） with a top submerged lance using nitrogen as carrying gas. The higher silver removal was obtained for the zinc powder size of 44.4μm, while the lowest silver removal efficiency was attained for the smaller particle size. The AgZn phase was detected in the slag for the 44.4 and 734.8μm particle sizes by XRD, which was in agreement with SEM-EDS analysis. Experimental behavior was explained according to the melting and residence time of the injected particles.