摘要
离子型稀土矿常采用离子交换浸出的方式进行稀土提取,受浸矿剂特性影响较大。从稀土浸出的本质原因—矿物表面带电为出发点,研究了电解质溶液中离子浓度、溶液p H及其阴离子类型对离子型稀土矿表面电荷性质的影响。结果表明,在p H3~6范围内,电解质浓度及溶液p H对矿物表面正/负离子吸附量具有较大影响,此影响作用与矿物表面可变电荷位点的质子化/去质子化行为及矿物正、负表面间的聚集作用有关;少量有机/配位阴离子在矿物表面的吸附可减少矿物正、负表面间的相互作用而降低矿物表面阳离子吸附量;大量SO_(4)^(2-)可明显降低阴离子在矿物表面的吸附量,但对表面阳离子吸附影响作用较复杂。综合结论可考虑从矿物表面改性的角度来强化离子型稀土的浸出过程。
The properties extraction the of rare agent.earths In from paper,ores ionic the were type effects investigated rare of earths ores electrolyte by ion exchange leaching p H is strongly anion influenced on by surface the of properties leaching ionic this earth that:concentration,the and cause its rare and type earth the charge surface effect of The type results rare show based3~6,on essential of leaching—mineral value charging.on in the mineral mineral range of surface,positive p H and and the effect electrolyte is concentration related the p H have a large behavior the surface the positive/negative charge aggregation of this negative to small between the protonation/deprotonation amount of relarge mineral duce mount and the adsorption of surfaces.interaction charge,A of and complex.the organic/ligand negative anions surfaces;can cation SO_(4)^(2-) can be on the mineral reduce surface the by positive reducing surface the positive more a aconclu-of can significantly considered but the effect is The leaching comprehensive rare sion from the perspective of mineral surface modification to enhance of earths.
作者
王莉
李亮
杨幼明
WANG Li;LI Liang;YANG You-ming(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,China;School of Metallurgy and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《稀土》
CAS
CSCD
北大核心
2021年第6期49-56,共8页
Chinese Rare Earths
关键词
离子型稀土矿
表面电荷性质
离子吸附
ionic type rare earth ore
surface charge property
ion adsorption
作者简介
王莉(1985-),女,湖北荆州人,博士研究生,主要从事稀有金属冶金材料的研究,E-mail:wl003@126.com;通讯作者:杨幼明,教授,E-mail:yanguming@126.com。
