摘要
在 6 0℃条件下 ,利用JSM - 5 90 0LV能谱电子显微镜、环境扫描电镜、X -射线衍射仪、分光光度仪等手段 ,系统地探讨了钾长石、斜长石与HF、土酸、HBF4体系反应后残酸中主要离子浓度的变化规律、固相的转变以及影响因素、颗粒表面的微观特征等。实验研究得出 :酸对长石晶体中铝元素具有优先溶蚀的能力 ,利用晶体结构理论对其机理进行了较深入的探讨 ;钾长石与酸反应强度强于斜长石 ;HF和土酸与钾长石、斜长石反应速度很快 ,显示出快、强的溶蚀特征 ,尤其是在前 30min ;8%HBF4体系在小于 2h ,体系显弱酸性 ,主要离子大小为HF和土酸体系中的 ～ ,12h后HBF4体系对长石的溶蚀强度基本相同 ;通过能谱电子显微镜观察到长石颗粒表面有复杂的垢成分存在 。
Under 60 C circumstance, with JSM-5900LV Spectrometry Electron Microscope, Environmental SEM, X'Pert PRO X-Ray, Scanning Spectrometer and so on, the concentration changing law of main ions, solid phase transformation, factors affecting the transformation, microscale characteristics of particle surface etc. are systematically investigated in the residual acids after potassic feldspar/sodium-calcium feldspars react with HF, HF/HCl, HCl/HBF4. The experiment result indicates: acids are able to prior dissolve Al element of feldspar crystal. The mechanism is deeply discussed by crystal structure theory: It is suggested the potassic feldspar's reaction with acid is more intensive than sodium-calcium feldspar; HF /mud acid reactions with potassic feldspar/sodium-calcium feldspar are very fast, which show a fast and intensive dissolution characteristics, especially in the initial 30 minutes; in less 2 hours reaction, 8% HBF4 system will turn into weak acid and the main ions content is only 1/2 to 1/5 of that in HF or mud acid, after 12 hours reaction, HBF4 system has identical dissolving intensity to feldspars; by utilizing Spectrometry Electron Microscope, complicated scale has been found unevenly distributing at feldspar particle surface.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2004年第12期116-118,共3页
Natural Gas Industry
基金
"油气藏地质及开发工程"国家重点实验室.西南石油学院的开放基金资助项目 (PLN0 114 )
