中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 5 May 2012 |
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The species of arsenic in secondary zinc oxide generated from fuming furnace were investigated. The results revealed that there are mainly three types of secondary zinc oxide based on three arsenic species. The main phase of As is As2O3 in type I, zinc arsenite (Zn(AsO2)2) in type II and lead arsenate (Pb(As2O6), Pb4As2O9) in type III, respectively. Selective leaching of zinc oxide of type II was carried out. The leaching rate of As kept at 65%−70% with 30 g/L NaOH and L/S ratio of 3 at 20 °C for 1 h, while the losses of Pb and Zn were both below 1%.
Key words: secondary zinc oxide; arsenic species; alkali leaching; arsenic removal
