ZHANG Xianmei¹， GAI Guosheng^2,3, HE Zhenquan², GAI Donghai⁴,LI Rentao^4,5, MENG Fanrong³, LI Xiaoyan⁶

(1. National Engineering Laboratory for Improving Quality of Arable Land，Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences, Beijing 100081, China; 2. School of Materials Science and Engineering, Tsinghua University,Beijing 100084, China; 3. Wuxi Research Institute of Applied Technologies, Tsinghua University, Wuxi 214100, China;4. Zibo Tsingda Powder Material Engineering Co., Ltd., Zibo 255000, China; 5. Zibo Hi-tech Zone Functional Powder Material Design and Preparation Institute, Zibo 255000, China; 6. Tianjin Cement Industry Design and Research Institute，Co., Ltd., Tianjin 300400, China)

Abstract: The potash feldspar was pressed by mechanical activating equipment and added usages of Ca(OH)2 for exploring the mechanism of improving potassium availability by contrasts of CaCl2,CaSO4. The water-soluble and available potassium of samples were analyzed as evaluating indexes to the activity. The laser particle size analyzer (LPSA), X-ray fluorescence spectrometer (XPS) and scanning electronic microscope (SEM) were used to characterize particle size distribution, elements, morphology, aggregate and scattering. The results show that the water soluble potassium of potash feldspar grows with the time of mechanical activation and increases remarkable by adding Ca(OH)2 or CaCl2, while else CaSO4 slowly. The available potassium of potash feldspar grows with the time of mechanical activation, too, but it does not increase by adding Ca(OH)2, CaCl2 and CaSO4. The mechanical pressings adding Ca(OH)2, CaCl2 and CaSO4 make potash feldspar emerge different variation character-istics on particle size distribution at normal atmospheric temperature. The growth trends of water-soluble and available potassium are incompatible with those of particle distribution descends and relate to the pressing time.

Keywords: calcium hydroxide; mechanical activation; potash feldspar; particle size distribution; water soluble potassium; available potassium

中图分类号：TB3

文献标志码：A

文章编号：1008-5548(2021)03-0105-06

DOI:10.13732/j.issn.1008-5548.2021.03.014

收稿日期： 2020-12-18，修回日期：2021-03-08，在线出版时间：2021-04-13 08:48。

基金项目：国家重点研发计划课题资助，编号：2017YFB0310801。

第一作者简介：张仙梅(1984—)， 女， 博士， 助理研究员， 研究方向为矿物土壤改良剂和矿物肥料的制备及应用评价。 E-mail:zhangxianmei@caas.cn。

通信作者简介：

何振全(1969—)，男，硕士，农艺师，研究方向为土壤肥料及调理剂的应用。E-mail: hezhenquan@chinapowder.com。

盖国胜(1958—)，男，博士，研究员，博士生导师，研究方向为粉体技术。E-mail: gaigs@139.com。