磷石膏固相球磨制备硫酸铵的研究.pdf

第33卷第3期非金属矿
2010年5月 Non-Metallic Mines May, 2010
磷石膏固相球磨制备硫酸铵的研究
许春凤1 邓跃全1 董发勤2 解忠雷1 何江洪1 付 鹏1
(1 西南科技大学材料学院,绵阳 621010;2 固体废物处理与资源化省部共建教育部重点实验室,绵阳 621010)
摘 要采用固相球磨制备的方法,以磷石膏和碳酸氢铵为原料制备硫酸铵。通过正交试验,优化了制备工艺条件,采用 XRD 分析了产物
的物相组成,并探讨了反应机理。研究表明:优选的固相球磨工艺参数为 CaSO4 ·2H2O 和 NH4HCO3 的摩尔比 ,球磨时间 15min,球料比 3∶1,
球磨机转速 600r/min,此条件下,反应的平均转化率达 %;XRD 分析表明,球磨作用下,磷石膏与碳酸氢铵能快速反应生成硫酸铵,同时部分硫
酸铵还会与未反应的石膏结合生成铵石膏;球磨机械增加了活化分子总数和有效碰撞次数,使反应速率大大增加,从而使磷石膏与碳酸氢铵在常
温下也能发生高效的转化反应。本法大幅降低能耗,为磷石膏的综合利用提供一条有效途径。
关键词磷石膏固相球磨制备硫酸铵
中图分类号:X705;+75 文献标识码:A 文章编号:1000-8098(2010)03-0062-04
Study on Preparation of Ammonium Sulfate by Solid-phase Ball Milling from Phosphogypsum
Xu Chunfeng1  Deng Yuequan1  Dong Faqing2  Xie Zhonglei1  He Jianghong1  Fu Peng1 
(1  School of Material, Southwest Univ. of Sci.&Tech., Mianyang  621010; 2  The Ministry of Education Key Laboratory of Solid waste disposal
and resource builded by Province and the Ministry of Education, Mianyang  621010)
Abstract Ammonium sulfate was prepared by solid-phase ball milling from phosphogypsum and ammonium bicarbonate as the raw material.
The technology of the preparation was optimized through orthogonal experiments; the positions of product was revealed by XRD analysis;
and the reaction mechanism was also discussed. The results showed that the optimum solid-phase ball milling parameters were as fol