河南某地低品位含锂粘土矿提锂新工艺研究  

New Technology for Extracting Li from Low-grade Lithium-bearing Clay

作　　者：李荣改[1,2] 宋翔宇[1,2] 高志[1,2] 冯艳丽[1,2] 李志伟[1,2] 

机构地区：[1]河南省岩石矿物测试中心,河南郑州450012 [2]河南省矿物加工与生物选矿工程技术研究中心,河南郑州450012

出　　处：《矿冶工程》2014年第6期81-84,共4页Mining and Metallurgical Engineering

基　　金：国土资源部公益性行业科研专项(201211018)

摘　　要：对河南某地低品位含锂粘土矿进行了试验研究。根据该矿石的工艺矿物学特性,采用原矿(-2 mm)焙烧-常温浸出流程,最优试验条件为:焙烧温度800℃,焙烧时间2 h,硫酸钙/原矿比0.7,氟化钙/原矿比0.2,硫酸钠/原矿比0.2,浸出时间1 h,浸出温度20℃,液固比3∶1,硫酸浓度50%,在此条件下锂浸出率为95.32%。在参考槽浸最佳条件的基础上进行了柱浸,可以获得锂浸出率为91.78%的结果。A low-grade lithium-bearing clay from Henan Province was taken for study. According to the mineralogical characteristics, a process of roasting followed by leaching at normal temperature was adopted in the test with the ore at size of -2 mm. Under the following optimal testing conditions： roasting at 800 ℃ for 2 h with calcium sulfate/ore ratio at 0.7, calcium fluoride/ore ratio at 0.2 and sodium sulfate/ore ratio at 0.2, followed by the leaching at 20 ℃ for 1 h with liquid-solid ratio at 3：1, sulfuric acid concentration of 50%, the leaching rate of Li reached 95.32%. Then a column leaching test was conducted with the best condition of tank leaching as reference, resulting in the leaching rate of Li up to 91.78%.

关 键 词：含锂粘土矿 焙烧 浸出 锂 

分 类 号：TF111[冶金工程—冶金物理化学]