摘要
通过X射线衍射、差热-热重分析、比表面积、孔体积等方法分析酸洗得到离子筛的微观结构及表面特征,研究以Li-OH和多金属结核还原氨浸渣为原料合成的正尖晶石结构的锂离子筛前驱体Li1+xMn2-xO4(0<x<0.33)的酸洗转型过程。结果表明,最佳酸洗转型条件为0.8(mol.L-1)盐酸酸洗2h。酸洗得到离子筛的结构与前驱体相比没有质的变化,仍保持尖晶石结构。锂离子筛的表面特性和锂离子筛中-OH基团的数量对吸附性能有很大影响。
The modification process of the normal spinel-type structureLi1＋,Mn2-xO4（0〈x〈0.33） made by synthesis of LiOH and reduction-ammoniacal leaching residue of polymetallic nodules is studied based on the analysis of the microstructure and surface features of modified Li-IS with XRD, SEM, TEM, TG-DTA and BET. The results show that the optimal modified condition is 0.8（mol· L^-1） hydrochloric acid for 2h. The microstructure of the modified Li-IS and the precursor are naturally same, both in spinel structure. There are remarkable effects of the surface features and -OH group quantity of Li-IS on the adsorption performance.
出处
《有色金属》
CSCD
北大核心
2006年第4期33-35,47,共4页
Nonferrous Metals
基金
国家大洋协会"十一五"攻关项目(DY105-04-01-7)
关键词
冶金技术
离子筛
酸洗转型
大洋多金属结核
还原氨浸渣
metallurgical technology
lithium ion-sieve
acidic washing modification
ocean polymetallic nodules
reduction-ammoniacal leaching residue
