两种改性磷矿粉的制备与表征  

Preparation and testing of two kinds of modified phosphorite powder

作　　者：冯兆滨[1] 刘秀梅[1] 刘光荣[1] 邹绍文[1] 张树清[2] 张建峰[2] 王玉军[2] 张夫道[2] 

机构地区：[1]江西省农业科学院土壤肥料研究所,江西南昌330200 [2]中国农业科学院农业资源与农业区划研究所,北京100081

出　　处：《植物营养与肥料学报》2008年第4期792-796,共5页Journal of Plant Nutrition and Fertilizers

基　　金：国家863计划课题“纳米肥料关键技术研究”(2001AA218041)资助;国家“十一五”支撑计划“南方丘陵岗地红黄壤区沃土技术模式研究与示范”项目(2006BAD25B08)资助

摘　　要：选用天然磷矿粉为原材料,通过硫酸酸化、有机无机活化剂活化分别制得酸化磷矿粉和活化磷矿粉。采用扫描电镜观察、X-射线衍射分析、激光粒度测试,证明了90%的酸化磷矿粉粒径为4.227μm,90%的活化磷矿粉粒径达到220 nm。活化磷矿粉结晶度降低,比表面积增大,有利于磷素在土壤中的释放与吸附。此种制备方法开辟了磷肥生产新工艺。The natural phosphorite powder was selected to prepare activated phosphorite powder and acidic phosphorite powder by a method of H2SO4 acidification and organic-inorganic agent activation, and several testing instruments including the scan electron-microscope （SEM）, the X-ray diffraction （XRD） and the laser granularity, were used to determine the types of phosphorite powder. It was verified that the particle size of more than 90 % of the acidic phosphorite powder was less than 4. 227 μm, and more than 90 % of activated phosphorite powder was less than 220 nm. Additionally, the crystallization of activated phosphorite powder declined, and the surface area increased.

关 键 词：活化 磷矿粉 制备 表征 

分 类 号：TD98[矿业工程—选矿]