摘要
系统分析了我国铝土矿中含硅脉石矿物高岭石、伊利石、叶蜡石的晶体结构与表面性质 ,讨论了晶体结构与铝硅酸盐矿物表面断裂键的特性、润湿性、电性及可浮性的关系 ,以及晶格杂质与可磨性对浮选行为的影响。结果表明三种矿物晶体边面上晶面的单位面积断裂键数皆有如下关系 :NSi-O( 110 ) <NSi-O( 0 10 ) <NSi-O( 10 0 ) ,NAl-O( 110 ) <NAl-O( 0 10 ) <NAl-O( 10 0 ) ,它从理论上解释了高岭石、叶蜡石和伊利石三种矿物晶体边面上润湿性的各向异性 ,一水硬铝石及铝硅酸盐矿物晶体结构的差异 ,使表面断裂的Al—O、Si—O键及表面离子活性区存在差别 。
The crystal structure and surface property of kaolinite, illite and pyrophyllite have been discussed. The influence of residual bond, lattice impurities and grinding behavior on wettability, electrokinetics and floatability have been studied based on crystal chemistry and solution chemistry of flotation. The number of breaking bonds per unit area of carystal plane lies in the following order: N Si-O(110) <N Si-O(010) <N Si-O(100) ,and N Al-O(110) <N Al-O(010) <N Al-O(100) in the three minerals. This accounts for the anisotropy of wettability and electrokinetics of different crystal planes of the three minerals. The difference in crystal structure between diaspore and aluminury silicate minerals results in the difference in residual bond and surface active site affecting their wettability and floatability.
出处
《矿冶工程》
EI
CAS
CSCD
北大核心
2000年第2期11-14,共4页
Mining and Metallurgical Engineering
基金
国家重点基础研究发展规划项目资助课题 !(G1 9990 6490 1 )
