化工进展2017，Vol.36Issue(6)：2057-2063,7.DOI:10.16085/j.issn.1000-6613.2017.06.013
高岭土在盐湖卤水提锂中的应用
Extraction of lithium from salt lake brine with kaolinite
李霞 1邓昭平 1李晶1
作者信息
- 1. 成都理工大学材料与化学化工学院,四川成都 610059
- 折叠
摘要
Abstract
This work appliedcalcination and acid leaching method to treate kaolinite,and obtained acid modified kaolinite with aluminum leaching solution. Then used acid modified kaolinite to adsorb lithium from Dangxiong Tso Salt Lake brine. To treat the remaining lithium in the brine after the adsorption,the aluminum leaching solution was used as the desorbent to desorb acid modified kaolinite,and again precipitated lithium from the desorption solution. The optimal process parameters of lithium extraction from salt lake brine with kaolinite were determined by this way. Results show that the mass concentration of lithium in the brine after adsorption was 230 mg/L,and then the lithium was precipitated by the aluminum leaching solution. The maximum lithium precipitation rate was achieved at 45.3% when mole ratio of Al to Li was 3.5 and Na to Al was 2.7,reaction temperature was 55℃ and reaction time was 1h. The desorption process used 35 mL of the aluminum leaching solution which was diluted 1 time by water to desorb 4g acid modified kaolinite after adsorption. Desorption rate of Li+ was 93.12% under 55℃ for 20min,and the mass concentration of Li+ was 480mg/L. Lithium precipitation rate was 84.51% after precipitation again.关键词
高岭土/酸改高岭土/铝浸出液/盐湖卤水/吸附/沉淀/解吸Key words
kaolinite/acid modified kaolinite/aluminum leaching solution/salt lake brine/adsorption/precipitation/desorption分类
矿业与冶金引用本文复制引用
李霞,邓昭平,李晶..高岭土在盐湖卤水提锂中的应用[J].化工进展,2017,36(6):2057-2063,7.
