Leaching behaviors of calcium and magnesium in ion-adsorption rare earth tailings with magnesium sulfate

作     者：Bo FAN Long-sheng ZHAO Zong-yu FENG De-peng LIU Wei-Qiang YIN Zhi-qi LONG Xiao-wei HUANG 范波;赵龙胜;冯宗玉;刘德鹏;尹伟强;龙志奇;黄小卫

作者机构：National Engineering Research Center for Rare Earth MaterialsGRINM Group Co.Ltd.Beijing 100088China General Research Institute for Nonferrous MetalsBeijing 100088China Grirem Advanced Materials Co.Ltd.Beijing 100088China 

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

年 卷 期：2021年第31卷第1期

页      面：288-296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）] 081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 

基　　金：The authors are grateful for the financial supports from the National Key Research and Development Program of China(2018YFC1801803) the Major Research Plan of the National Natural Science Foundation of China(91962211) 

主　　题：ion-adsorption rare earth ore magnesium sulfate environmental remediation leaching behaviors lime water 

摘      要：The leaching behaviors of calcium and magnesium in the rare earth tailings leached with magnesium sulfate using deionized water,CaCl2 solution and lime water were *** data indicated that magnesium in the tailings was easy to be leached out since most of the magnesium was in the form of water-soluble *** of calcium in the lime water was electrostatically adsorbed on the clay mineral of the tailings,and the water-soluble magnesium was also gradually converted into exchangeable phase because of back-adsorption of Mg2+on the clay mineral with increasing the pH *** the liquid-to-solid ratio was 0.80,the contents of readily-available magnesium and calcium were 104.4−207.6 and 201.7−1426.3 mg/kg,respectively,which could meet the requirements for *** results suggest a promising route for the environmental remediation of ion-adsorption rare earth ore after in-situ leaching.