摘要
云南某地含锂铝土岩中Al2O3、SiO2、K2O、Fe2O3和Li2O的含量分别为48.36％、28.53％、10.11％、2.53％和0.75％,铝硅比为1.70,具有较高的综合利用价值.经过一粗三精两扫的实验室浮选闭路工艺流程,可获得产率为25.70％的铝土矿精矿,其中Al2O3和SiO2的品位分别为70.96％、7.11％,铝硅比为9.98.该工艺同时可获得产率为74.30％的富锂产品,Li2O含量为0.92％,可作为提锂的原料,实现含锂铝土岩中铝土矿与锂矿物的富集,为该类资源的综合利用提供重要参考.
Abstract
The contents of Al2O3,SiO2,K2O,Fe2O3,and Li2O in lithium-aluminum-bearing claystone(LABC)in Yunnan Province are 48.36％,28.53％,10.11％,2.53％,and 0.75％,respectively.The LABC has Al/Si ratio of 1.70 and has a high comprehensive utilization value.Through the laboratory flotation closed-circuit process,involving one rougher step,three cleaner steps,and two scavenger steps,a bauxite concentrate with a yield of25.70％has been obtained.The concentrate has Al2O3 and SiO2 contents of 70.96％and 7.11％,respectively,with an Al/Si ratio of 9.98.Meanwhile,a lithium-rich product with a yield of 74.30％has been obtained.It contains 0.92％of Li2O,and can be served as a raw material for lithium extraction.This processing technique can be used to achieve the enrichment of bauxite and lithium minerals from the LABC.It provides an essential reference for the comprehensive utilization of such resources.
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