Two-stage cyclic ammonium sulfate roasting and leaching of extracting vanadium and titanium from vanadium slag

作     者：Qing Lin Guoquan Zhang Kun Wang Dongmei Luo Siyang Tang Hairong Yue Qing Lin;Guoquan Zhang;Kun Wang;Dongmei Luo;Siyang Tang;Hairong Yue

作者机构：School of Chemical EngineeringSichuan UniversityChengdu 610065China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第7期

页      面：39-47页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：funded by National Natural Science Foundation of China(22008161) 

主　　题：Vanadium Titanium Roasting Leaching 

摘      要：Compared with traditional sodium or calcification roasting process for vanadium extraction from raw vanadium slag(V-slag),ammonium sulfate(AS)roasting could reduce about 470℃ roasting temperature and avoid Cl_(2),HCl,sodium-containing waste-water and waste gypsum *** reduce the amount of AS added in vanadium extraction process,an efficient AS two-stage cyclic roasting and acid leaching process was *** result of TG analysis indicates V-slag could be decomposed in 275-380℃ using AS roasting *** 2.03:1 total mass ratio of AS to V-slag,90.86%V and 80.54%Ti could be extracted after 380℃ roasting for 30 min and 8%initial concentration of H_(2)SO_(4) leaching at 70℃ for 100 *** analysis indicates V-containing spinel phase in the 1st stage leaching residue would be efficiently decomposed by the cyclic two-stage roasting and leaching ***,the valence of V(Ⅲ)in raw V-slag was not changed after the 1st AS roasting stage,but a part of V(Ⅲ)in the 1st leaching residue was oxidized to V(V)after 2nd roasting process.