Performace of a Kind of Organic Emulsion Coated Phosphogypsum Particles  

作　　者：CH ENG Jiangguo ZHANG Je XIE Fei ZHANG Yusong 成奖国;张杰;XIE Fei;ZHANG Yusong(College of Materials and Metallurgy Guizhou University,Guiyvang 550025,China;Mining College,Guizhou University,Guiyang 550025,China;Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang 550025,China)

机构地区：[1]College of Materials and Metallurgy Guizhou University,Guiyvang 550025,China [2]Mining College,Guizhou University,Guiyang 550025,China [3]Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang 550025,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2020年第5期872-878,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51164004);the Chunhui Plan of the National Department of Education of China(No.Z2006-1-52003)。

摘　　要：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,optical microscope,gravimetric analysis and chemical detection.The results showed that the initial emulsion can be used directly for coating and granulation of phosphogypsum.The spray re-coating was carried out by using diluted emulsion with the water-to-emulsion mass ratio of 1∶1.The organic emulsion coated phosphogypsum crystal can be clearly observed,and the mixing zone at internal boundary between the organic emulsion and phosphogypsum crystal was distinguishable under the optical 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 be solidified into film-network between the phosphogypsum crystals inside of the coated particles,and it can play a protective role in improving the acid resistance,alkali resistance and water resistance of phosphogypsum,and reduce the degree of dissociation of phosphogypsum in water.

关 键 词：organic emulsion PHOSPHOGYPSUM coating particle resistance to acid and alkali 

分 类 号：TQ177.375[化学工程—硅酸盐工业]