无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2011, Vol. 43 ›› Issue (6): 24-.

• 论文 • 上一篇    下一篇

脱镁母液制备磷酸铵镁过程中的粒度分布

 刘刚, 王学魁, 段瑛锋, 沙作良, 袁建军   

  1. 天津科技大学天津市海洋资源与化学重点实验室,天津 300457
  • 出版日期:2011-06-10 发布日期:2011-06-14

Crystal size distribution of struvite in preparation process by mother liquor from magnesium-hydroxide production

 LIU  Gang, WANG  Xue-Kui, DUAN  Ying-Feng, SHA  Zuo-Liang, YUAN  Jian-Jun   

  1. Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin University of Science and Technology,Tianjin 300457,China
  • Online:2011-06-10 Published:2011-06-14

摘要: 以脱镁母液和磷酸为原料,采用半间歇操作方式制备磷酸铵镁,研究了操作条件(包括搅拌转速、加料位置、加料速度、反应物浓度、晶种加入量)对磷酸铵镁晶体粒度分布的影响。结果表明:适当提高搅拌转速、降低加料速度和降低反应物浓度均可增大产品的平均粒径并减小其变异系数;在桨区加料所得产品平均粒径较大且粒度分布较好;加入适量晶种可以显著增大产品的平均粒径并使其粒度分布更加均匀。

关键词:  , 海水利用, 磷酸铵镁, 反应结晶, 粒度分布

Abstract: Struvite was prepared by semi-batch method with phosphoric acid and the mother liquor from magnesium-hydroxide production as raw materials.Influences of operating conditions,such as stirring speed,feed location,feed rate,reactant concentration,and adding amount of seed,on crystal size distribution (CSD) of struvite were investigated.Results showed properly increasing stirring speed,decreasing feed rate,or decreasing reactant concentration all could make the average crystal size increase and the coefficient of variation(C.V.) decrease;feeding in the propeller area could create larger crystal size and better CSD than feeding in the surface;and seeding appropriately could cause average size of products increase significantly and the CSD more uniform.

Key words: seawater utilization, struvite, reaction crystallization, crystal size distribution

中图分类号: