从含铷钾尾矿中浸出铷钾试验研究  

Leaching of Rubidium and Potassium From a Tailing

作　　者：方亚东 田学达 张小云[2] 武用 FANG Yadong;TIAN Xueda;ZHANG Xiaoyun;WU Yong(School of Environment and Resources,Xiangtan University,Xiangtan 411105,China;School of Chemical Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学环境与资源学院,湖南湘潭411105 [2]湘潭大学化工学院,湖南湘潭411105

出　　处：《湿法冶金》2019年第5期347-351,共5页Hydrometallurgy of China

摘　　要：某萤石矿浮选尾矿中,Rb2O、K2O品位分别为0.44%和9.23%,具有回收价值。研究了采用传统加热—硫酸+氟硅酸浸出工艺和微波辐照—硫酸+氟硅酸浸出工艺浸出铷和钾,考察了浸出时间、温度、硫酸用量、氟硅酸用量和矿浆液固质量比对铷、钾浸出率的影响。结果表明:在浸出时间2 h、温度95℃、硫酸用量60%、氟硅酸用量20%、矿浆液固质量比2.5∶1、传统加热并微波辐照条件下,铷、钾浸出率分别达83.6%和88.4%,浸出效果较好。Rb2O and K2O in a tailing produced from fluorite flotation have the grades of 0.44% and 9.23%,respectively.The rubidium and potassium can be leached by traditional heating-sulfuric acid-fluorosilicic acid process and microwave irradiation-sulfuric acid-fluorosilicic acid process,respectively.Some factors related to the leaching of rubidium and potassium,including leaching time,leaching temperature,dosage of sulfuric acid and fluorosilicic acid and liquid-to-solid ratio were examined.The results show that the leaching of rubidium and potassium can reach 83.6%and 88.4%,respectively,under the conditions of leaching time of 2 h,temperature of 95℃,sulfuric acid concentratio n of 60%,fluorosilicic acid concentration of 20%,liquid-to-solid ratio of 2.5∶1,conventional and microwave heating.The leaching effect is good.

关 键 词：萤石 尾矿 微波 硫酸 氟硅酸 浸出 铷 钾 

分 类 号：TF803.21[冶金工程—有色金属冶金] TF826.4