石灰石和钾长石焙烧法制备硅钙钾肥试验研究  

Study on Preparation of Silicon-calcium-potassium Fertilizer by Calcining Limestone and Potassium Feldspar

作　　者：李兴平 刘阳 胡兆平 Li Xingping;Liu Yang;Hu Zhaoping(Kingenta Ecological Engineering Group Co.,Ltd.,Linyi,Shandong,China;State Key Laboratory of Nutrition Resources Integrated Utilization,Linyi,Shandong,China;National Engineering Technology Research Center For SCRF,Linyi,Shandong,China)

机构地区：[1]金正大生态工程集团股份有限公司,山东临沂276000 [2]养分资源高效开发与综合利用国家重点实验室,山东临沂276000 [3]国家缓控释肥工程技术研究中心,山东临沂276000

出　　处：《矿产综合利用》2020年第2期82-86,共5页Multipurpose Utilization of Mineral Resources

基　　金：磷石膏产业化高效利用关键技术研究与应用贵州省重大专项(黔科合重大专项字(2016)3021);30万吨/年磷石膏制酸联产土壤调理剂工程资源节约和环境保护2015年中央预算内投资备选项目(黔发改投资[2015]933号)。

摘　　要：采用钾长石和石灰石为原料,硫酸钠为助剂,在高温条件下焙烧生产硅钙钾肥。研究了钾长石与石灰石质量比、硫酸钠用量、焙烧温度与时间等因素对钾长石活化的影响,在较优条件下,枸溶性钾的溶出率为95.3%。通过X射线衍射仪对焙烧产物进行了矿物组成分析,探讨了钾长石与石灰石在添加剂硫酸钠的作用下的热反应机理。Potassium feldspar and limestone were used as raw materials and sodium sulfate as additives for preparation of silicate-calcium-potassium fertilizer by roasting at high temperature.The influence of ratio of potassium feldspar to limestone,amount of sodium sulfate,roasting temperature and time on activation of potassium feldspar was studied.Under the optimal conditions the citrate-soluble potassium dissolution rate was 95%.The mineral composition of calcined products was analyzed by X-ray diffractometer.The thermal reaction mechanism of potassium feldspar and limestone under the action of additive sodium sulfate was discussed.

关 键 词：钾长石 石灰石 高温焙烧 反应机理 

分 类 号：TD989[矿业工程—选矿] TQ443.5[化学工程—化学肥料工业]