一种有机乳液包覆磷石膏颗粒的制备与性能  

Preparation and Properties of a Kind of Phosphogypsum Particles Coated by Organic Emulsion

作　　者：成奖国[1,2] 张杰 张玉松[1,2] 谢飞 Cheng Jiangguo;Zhang Jie;Zhang Yusong;Xie Fei(Mining College,Guizhou University,Guiyang,Guizhou 550025;Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guiyang,Guizhou 550025)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025

出　　处：《非金属矿》2020年第2期1-4,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51164004);贵州省科技厅省校联合基金(黔科合LH字[2014]7656);教育部春晖计划(Z2006-1-52003)。

摘　　要：以硅丙、苯丙和纯丙3种有机乳液为包覆料,对磷石膏进行包覆制备有机乳液包覆磷石膏颗粒,用扫描电镜配合能谱分析、偏光显微镜、质量分析及化学检测等方法研究了有机乳液包覆磷石膏颗粒的结构及矿物学特征、抗酸碱性、耐水性及其在水中的解离程度。结果显示:对磷石膏包覆造粒时可直接用初始乳液,进行二次喷雾包覆时需按照m乳液∶m水=1∶4对乳液进行稀释;偏光显微镜下能明显看到有机乳液包覆磷石膏晶体,有机乳液包覆形成的混合带明显;扫描电镜下磷石膏颗粒表面较圆滑,能谱分析检测到C、O、S、Ca等基本元素;有机乳液在包覆颗粒的磷石膏晶体间固化成膜起到保护作用,提高了磷石膏的抗酸碱性能和耐水性,使磷石膏在水中的解离程度减小。The phosphogypsum particles coated with organic emulsion were prepared by coating three kinds of organic emulsion of silicone-acrylic,styrene-acrylic and acrylic.The structure and mineralogical characteristics,acid and alkali resistance,water resistance and dissociation degree of coated phosphogypsum were studied by means of SEM-EDAX,polarizing microscope,gravimetric analysis and chemical detection.The results showed that the initial emulsion can be used directly for coating and granulation of phosphogypsum.When the second spray coating was carried out,the emulsion should be diluted according to the mass ratio of 1:4 between the emulsion and water.The hosphogypsum crystal coated with organic emulsion can be clearly observed,and the mixed zone formed by the organic emulsion coating was obvious under the polarizing microscope.SEM photos showed that the surface of coated phosphogypsum particles was smooth.And the basic elements of C,O,S and Ca can be detected by EDAX.Organic emulsion can form films between phosphogypsum crystals in the coated particles,and play a protective role in improving the acid&alkali resistance and water resistance of phosphogypsum,and reduce the degree of dissociation of phosphogypsum in water.

关 键 词：有机乳液 磷石膏 包覆 颗粒 耐酸碱性 

分 类 号：TU528.09[建筑科学—建筑技术科学]