作者机构：
[谢雪梅; 宋迎春; 唐争气; 林东方] School of Geosciences and Info.-Physics, Central South University, Changsha, China;[唐争气] School of Municipal and Surveying Engineering, Hunan City University, Yiyang, China
通讯机构：
School of Geosciences and Info.-Physics, Central South University, Changsha, China
作者机构：
[李辕成; 闵小波; 张建强; 王密] School of Metallurgical and Environment, Central South University, Changsha, Hunan 410083, China;School of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan 413000, China;[张纯] School of Metallurgical and Environment, Central South University, Changsha, Hunan 410083, China, School of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan 413000, China
通讯机构：
[Min, X.-B.] S;School of Metallurgical and Environment, Central South University, Changsha, Hunan, China
作者机构：
[吴兴应] College of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan Province, China;[龚光彩; 王晨光] College of Civil Engineering, Hunan University, Changsha, Hunan Province, China
通讯机构：
College of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan Province, China
作者机构：
[唐争气; 宋迎春; 邹勃] School of Geosciences and Info-Physics, Central South Univ, Changsha, Hunan, China;[唐争气] School of Municipal and Surveying Engineering, Hunan City Univ, Yiyang, Hunan, China
通讯机构：
School of Geosciences and Info-Physics, Central South Univ, Changsha, Hunan, China
作者机构：
[张伟] College of Municipal and Mapping Engineering, Hunan City University, Yiyang, 413000, China;[周书葵] School of Urban Construction, University of South China, Hengyang, 421001, China;[段毅] Sinosteel Corporation Wuhan Safety and Environmental Protection Research Institute, Wuhan, 430081, China;[蒋海燕] College of Municipal and Mapping Engineering, Hunan City University, Yiyang, 413000, China, School of Urban Construction, University of South China, Hengyang, 421001, China
摘要：
Zinc neutral leaching residue (ZNLR) from hydrometallurgical zinc smelting processing can be determined as hazardous intermediate containing considerable amounts of Cd and Zn which have great threats to the environment. The ZNLR contained approximately 35.99% Zn, 15.93% Fe and 0.26% Cd, and Cd mainly existed as ferrites in the ZNLR in this research. Reductive acid leaching of ZNLR was investigated. The effects of hydrazine sulfate concentration, initial sulfuric acid concentration, temperature, duration and liquid-to-solid ratio on the extraction of Cd, Zn and Fe were examined. The extraction efficiencies of Cd, Zn and Fe reached 90.81%, 95.83% and 94.19%, respectively when the leaching parameters were fixed as follows:hydrazine sulfate concentration, 33.3 g/L; sulfuric acid concentration, 80 g/L; temperature, 95 ℃; duration of leaching, 120 min; liquid-to-solid ratio, 10 mL/g and agitation, 400 r/min. XRD and SEM-EDS analyses of the leaching residue confirmed that lead sulfate (PbSO_4) and hydrazinium zinc sulfate((N_2H_5)_2Zn(SO_4)_2) were the main phases remaining in the reductive leaching residue.
作者机构：
[郭际明; 黄长军; 喻小东] School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;[聂智平; 黄长军] School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Geodesy and Geomatics, Wuhan University, China
作者机构：
College of Electrical and Information Engineering, Hunan University, Changsha;410082, China;College of Municipal and Surveying Engineering, Hunan City University, Yiyang;413000, China;[黎灿兵; 王煌; 耿英会; 曹一家; 石海清] College of Electrical and Information Engineering, Hunan University, Changsha
通讯机构：
[Li, C.] C;College of Electrical and Information Engineering, Hunan University, Changsha, China
