氢氧化钙对机械力活化钾长石中钾元素活性的影响  

Effect of mechanical activation on potassium of potash feldspar adding calcium hydroxide

作　　者：张仙梅 盖国胜[2,3] 何振全 盖东海[4] 李仁涛 孟繁荣 李小燕 ZHANG Xianmei;GAI Guosheng;HE Zhenquan;GAI Donghai;LI Rentao;MENG Fanrong;LI Xiaoyan(National Engineering Laboratory for Improving Quality of Arable Land,Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;Wuxi Research Institute of Applied Technologies,Tsinghua University,Wuxi 214100,China;Zibo Tsingda Powder Material Engineering Co.,Ltd.,Zibo 255000,China;Zibo Hi-tech Zone Functional Powder Material Design and Preparation Institute,Zibo 255000,China;Tianjin Cement Industry Design and Research Institute,Co.,Ltd.,Tianjin 300400,China)

机构地区：[1]中国农业科学院农业资源与农业区划研究所,耕地培育技术国家工程实验室,北京100081 [2]清华大学材料学院,北京100084 [3]清华大学无锡应用技术研究院,江苏无锡214100 [4]淄博清大粉体材料工程有限公司,山东淄博255000 [5]淄博市高新区功能性粉体材料设计制备研究院,山东淄博255000 [6]天津水泥工业设计研究院有限公司,天津300400

出　　处：《中国粉体技术》2021年第3期105-110,共6页China Powder Science and Technology

基　　金：国家重点研发计划课题资助,编号:2017YFB0310801。

摘　　要：为了探索提升钾长石中钾元素有效性的机制,采用机械力活化设备,对钾长石及添加不同剂量的Ca(OH)_(2)进行活化处理,并设置CaCl_(2)、CaSO_(4)进行对照;测定活化样品的水溶性钾和有效钾水平作为主要评价指标;利用激光粒度分析仪、荧光光谱仪、扫描电子显微镜表征钾长石活化样品的粒度分布、元素、形貌变化、团聚或分散状态等。结果表明:钾长石水溶性钾含量随机械力活化加工时间增加而增加,添加Ca(OH)_(2)、CaCl_(2)可显著提高水溶钾含量,添加CaSO_(4)则作用较弱;机械力活化也可随加工时间提升钾长石有效钾含量,但添加Ca(OH)_(2)、CaCl_(2)、CaSO_(4)不能促进钾长石有效钾增加;常温条件下添加Ca(OH)_(2)、CaCl_(2)、CaSO_(4),对机械力活化钾长石的粒度分布变化呈现不同的粒度变化特征,水溶钾和有效钾的活性增长趋势与粒度降低趋势不一致,而与加工时间有关。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 CaCl_(2),CaSO_(4).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 CaCl_(2),while else CaSO_(4)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),CaCl_(2)and CaSO_(4).The mechanical pressings adding Ca(OH)_(2),CaCl_(2)and CaSO_(4)make potash feldspar emerge different variation characteristics 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.

关 键 词：氢氧化钙 机械力活化 钾长石 粒度分布 水溶钾 有效钾 

分 类 号：TB3[一般工业技术—材料科学与工程]