Enhanced manganese leaching from electrolytic manganese residue by electrochemical process and Na2SO3

被引：24

作者：

Zhao, Zhisheng ^{[1
]}

Wang, Rui ^{[1
]}

Shu, Jiancheng ^{[1
]}

Chen, Mengjun ^{[1
]}

Xu, Zhonghui ^{[1
]}

Xue, Tao ^{[2
]}

Zeng, Xiangfei ^{[1
]}

He, Dejun ^{[1
]}

Tan, Daoyong ^{[1
]}

Deng, Zongyu ^{[3
]}

Ai, Kehua ^{[4
]}

机构：

[1] Southwest Univ Sci & Technol, Key Lab Solid Waste Treatment & Resource Recycle S, Minist Educ, 59 Qinglong Rd, Mianyang 621010, Peoples R China

[2] Guizhou Acad Sci, Guiyang 550000, Peoples R China

[3] Zunyi Manganese Day Magnet Ind Grp Co Ltd, Zunyi 563000, Guizhou, Peoples R China

[4] Inno Circuits Ltd, Suining 629000, Sichuan, Peoples R China

来源：

MINERALS ENGINEERING | 2022年 / 189卷

基金：

中国国家自然科学基金;

关键词：

Electrolytic manganese residue; Manganese; Na2SO3; Electric field; Shrinking core model; Leaching kinetics; AMMONIA NITROGEN; SULFURIC-ACID; SULFITE; TELLURIUM; RECOVERY; ALKALINE; SULFATE; REMOVAL;

D O I：

10.1016/j.mineng.2022.107862

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Electrolytic manganese residue (EMR) is a general industrial solid waste containing manganese (Mn) and heavy metals that is produced in the process of electrolytic metal manganese. In this study, the leaching efficiency of Mn from EMR was improved by using Na2SO3 and electric field. The results showed that Mn leaching efficiency reached 96.63 % (333 K, 8 wt% H2SO4, 60 mA/cm2 current density and 0.16 mol/L Na2SO3), which was 30.56 % higher than leaching with H2SO4 and 12.76 % higher than leaching by using electric field. The kinetic results based on the unreacted contraction nucleus model showed that the process is controlled by a mixture of external diffusion interfaces and chemical reactions, with a calculated activation energy of 19.68 kJ/mol. Na2SO3 and electric field enhanced the leaching of Mn by removing the compound salts layer wrapped around the outside of Mn and reducing the release of high-valent Mn to divalent Mn. This study provide a novel approach for the utilisation of EMR.

引用

页数：8

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