文献类型：期刊文献

英文题名：Enhancing the extraction of germanium from zinc oxide dust through microwave roasting and the underlying mechanism

作者：Wang, Wankun Wang, Fuchun

第一作者：Wang, Wankun;王万坤

通信作者：Wang, FC[1];Wang, FC[2]

机构：[1]Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China

第一机构：Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China

通信机构：corresponding author), Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2024

卷号：206

外文期刊名：CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION

收录：;EI(收录号：20244617355313);Scopus(收录号：2-s2.0-85208543719);WOS:【SCI-EXPANDED(收录号:WOS:001358242900001)】；

基金：This work was supported by the Research Program of the Science and Technology Department of Guizhou Province (Qiankehe Jichu [2019] 1418) , the Research Program of Talented Scholars of Guizhou Institute of Technology (XJGC20190965) .

语种：英文

外文关键词：Zinc oxide dust; Germanium; Microwave roasting; Leaching with sulfuric acid; Recovery

摘要：In this study, a microwave roasting-sulfuric acid leaching process was proposed to increase the efficacy of extracting germanium (Ge) from Ge-bearing zinc oxide (ZnO) dust. Microwave energy has a selective cleavage effect on ZnO dust. Proper microwave roasting of Ge-bearing ZnO dust can fracture the ZnO dust, reduce the particle size, increase the particle size uniformity and specific surface area, and transform the phase of Fe4Ge3O12, thus improving the leaching percentage of Ge from the ZnO dust. The optimized conditions were as follows: microwave heating temperature of 290 degrees C, microwave heating time of 5 min, liquid-solid ratio of 6 mL/g, leaching time of 4 h, initial concentration of sulfuric acid of 9 mol/L, and leaching temperature of 60 degrees C; the leaching percentage of Ge was 84.4 %. In contrast, the leaching percentage of Ge was found to be 62.4 % under the same conditions without roasting. In this study, we described a promising strategy for leaching Ge from ZnO dust via the microwave roasting-sulfuric acid leaching process.