硫-氟混酸作用下富钾页岩提钾的机理研究  

STUDY ON THE MECHANISM OF EXTRACTING POTASSIUM FROM THE POTASSIUM-RICH SHALE USING SULFURIC-FLUORIN MIXED ACID

作　　者：刘杰[1] 印万忠[1] 韩跃新[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《矿冶》2007年第4期17-21,共5页Mining And Metallurgy

基　　金：教育部新世纪优秀人才基金资助(NCET-05-0291)

摘　　要：本文对朝阳地区的富钾页岩矿样在硫-氟混酸作用下浸出提钾的反应机理进行了系统的研究。分析了氟化物溶解硅酸盐的主要反应机理;利用XRD对最佳条件下钾浸出率为94.028%的提钾后水不溶物进行物相分析,确定了氢氟酸与页岩中主要含钾矿物长石和云母的主要反应过程。对主要的反应过程用热力学的方法进行了计算和分析,确定主要反应过程可以自发的进行。It is studied that the mechanism of extracting potassium from the potassium-rich shale sample in Caoyang using sulfuric-fluoric mixed acid. It is determined the main mechanism of decompounding silicate by fluoride. Phase analysis results of the water-insoluble substance after extracting potassium in the optimal condition show the extracting ratio of potassium reaching 94. 028 % by XRD. And the main reaction process of fluorhydric acid and mineral contained potassium such as feldspar and muscovite, in the potassium-rich shale is confirmed. At the same time, main reactions are calculated and analysed in thermodynamics method, which is a spontaneous process.

关 键 词：富钾页岩 硫-氟混酸 反应机理 热力学 

分 类 号：TF826.1[冶金工程—有色金属冶金]