酒石酸对离子型稀土矿杂质浸出行为的影响  

Influence of Tartaric Acid on Impurity Leaching Behavior of Ionic Rare Earth Ores

作　　者：方夕辉[1,2] 夏艳圆 邱廷省 朱冬梅[1] Fang Xihui;Xia Yanyuan;Qiu Tingsheng;Zhu Dongmei(School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;Jiangxi Key Laboratory of Mining Engineering, Ganzhou 341000, China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]江西省矿业工程重点试验室,江西赣州341000

出　　处：《金属矿山》2018年第6期94-98,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51674125)

摘　　要：为提高稀土浸出过程的选择性,以酒石酸为抑杂剂考察其对硫酸铵浸出稀土时浸出行为的影响。结果表明,以硫酸铵为浸出剂、酒石酸为抑杂剂浸出不同种类稀土矿时,与单独以硫酸铵作浸出剂相比,浸出液中铝、铁去除率可达90%以上,且不影响稀土浸出率。对酒石酸与Al^(3+)、Fe^(3+)的溶液化学计算和分析结果表明,3<pH<6时,酒石酸可解离出与金属离子稳定络合的配位离子C_4H_5O_6^-、C_4H_4O_6^(2-),与离子型稀土矿浸出时矿石表面解离出的Al^(3+)、Fe^(3+)生成难溶络合物而提高稀土浸出的选择性,浸出过程酒石酸络合铁离子与铝离子的适宜pH范围为4~5。The leaching behaviors of impurities and rare earth elements were studied to improve the selectivity of rare earth leaching process,using tartaric acid as impurities depressant and ammonium sulfide as the lixiviant to control the impurities in the ion absorbed rare earth ores leaching. Results show that ammonium sulfate as leaching agent,tartaric acid as leaching impurities to leach different types of rare earth ores,compared with using single ammonium sulfate as leaching agent,removal rates of aluminum and iron ions was both found to be above 90%,and has on influence on rare earth leaching rate. Solution chemical calculation and analysis results on tartaric acid and Al^（3＋）,Fe^（3＋）show that,when 〈3 pH〈 6,tartaric acid can dissociate stable and chelating ligand metal ions C_4H_5O_6^-,C_4H_4O_6^（2-）,reaction with Al^（3＋）,Fe^（3＋）which is dissociated from ionic type rare-earth ore surface,increased the selectivity of leaching process,optimum p H range for tartaric acid chelating ferric ion and aluminium ion is 4~5.

关 键 词：离子型稀土矿 酒石酸 抑杂剂 

分 类 号：TF845[冶金工程—有色金属冶金] TF803.21