Preparation of electronic grade manganese sulfate from leaching solution of ferromanganese slag

作     者：闫升 邱运仁 Sheng YAN;Yun-ren QIU

作者机构：中南大学化学化工学院长沙410083 湖南省能源与化工新材料研究生培养创新基地长沙410083 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第11期

页      面：3716-3721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）] 08[工学] 

基　　金：Project(2013ZX0754-001)supported by China National Critical Project for Science and Technology on Water Pollution Prevention and Control 

主　　题：ferromanganese slag leaching purification manganese sulfate utilization of solid waste 

摘      要：Preparation of electronic grade manganese sulfate from ferromanganese slag, including grinding, leaching and purification, was studied. The impurities, such as Fe3+, Al3+, Ca2+, Mg2+, heavy metal ions and Na+, K+, were removed from leaching solution by neutralized-hydrolysis, fluorination precipitation, sulfuration precipitation and re-crystallization. Effects of pH of reaction, temperature and dosage of the different additives on removal rates of the metallic ions in leaching solution were investigated, and the suitable temperature, pH and the added amount of precipitating agent were obtained. The prepared manganese sulfate product, of which the mass fractions of Ca2+, Mg2+, Na+, K+ are all smaller than 0.005%, the mass fractions of Fe3+, Al3+ and heavy metal ions are smaller than 0.001%, and the mass fraction of Mn2+ is greater than 32%, can meet the demand of anode materials of lithium-ion batteries.