硫酸与氢氟酸混合溶液中白云母溶解行为  

Dissolution Behavior of Muscovite in Mixed Solution of Sulfuric Acid and Hydrofluoric Acid

作　　者：何东升[1] 李巧双 王贤晨 刘星[1] 秦芳[1] 

机构地区：[1]武汉工程大学资源与土木工程学院,武汉430073

出　　处：《有色金属（冶炼部分）》2016年第12期37-39,43,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51674179);湖北省自然科学基金资助项目(2014CFB794);湖北省教育厅科研计划项目(Q20121504);武汉工程大学青年基金资助项目(Q201405)

摘　　要：通过白云母在硫酸与氢氟酸混合溶液中的溶解试验,研究白云母中Al、Si及K的溶出行为,采用FTIR、XRD、SEM等手段考察白云母溶解过程中晶体结构变化规律。结果表明,与单一硫酸溶液体系相比,加入4%氢氟酸后,Al、Si和K的溶出率分别提高了23.12、44.51和11.00个百分点,说明氢氟酸有效破坏白云母晶体结构中Al-O八面体和Si-O四面体。随溶解时间延长,-OH、Si(AlIV)-O(Al)、Si-O-Si(AlIV)逐渐破坏,破坏晶面主要是(002)、(004)和(131)。Dissolution behavior of A1, Si, and K was studied by dissolution experiment in mixed solution of sulfuric acid and hydrofluoric acid. Crystal structures variation of muscovite were investigated with FTIR, XRD, SEM, and other means. The results indicate that, compared with single sulfuric acid solution system, dissolution rates of A1, Si and K in mixed solution of sulfuric acid and hydrofluoric acid increase by 23. 12, 44. 51, and 11.00 percentage point, respectively. That promotes hydrofluoric acid can effectively destroy Si-O tetrahedron and Al-O octahedron of muscovite. With dissolution time prolongs, - OH, Si （Al^IV ） - O-（Al）, and Si- O- Si （Al^IV ） gradually be destroyed. Firstly destroyed lattice plane is （002）, （004）, and （131）.

关 键 词：白云母 溶解 氢氟酸 晶体结构 

分 类 号：TD925.6[矿业工程—选矿]