CIESC Journal

• 化工学报 • 上一篇    下一篇

硝酸处理磷矿制造磷氮复合肥料

戴元法,王葆和   

  1. 上海化工研究院 ,上海化工研究院
  • 出版日期:1960-06-25 发布日期:1960-06-25

THE PRODUCTION OF NITRIC PHOSPHATE FERTILIZER BY THE DECEMPOSITION OF PHOSPHATE ROCK WITH NITRIC ACID

TYE YUEN-FA and WANG BAO-HU (The Research Institute of Chemical Industry, Shanghai)   

  • Online:1960-06-25 Published:1960-06-25

摘要: <正>硝酸处理磷矿制造磷氮(钾)复合肥料是近年来在化学肥料生产中获得很大发展的方法之一、它的工艺过程主要包括下列几个步骤:(1)磷矿在萃取器内用硝酸分解;(2)分解后得到的料浆在一系列反应器内用氨中和;(3)中和后的料浆与返回的成品细粉混合造粒;(4)湿颗粒物料进行干燥筛分包装。

Abstract: Nitric phosphate fertilizer has been made commercially in Europe for more than 20 years. Although various processes were reported in literature and patents with different features were published, little about equipments and operating conditions has been disclosed. A new process for manufacture nitric phosphate fertilizer was studied. The process was carried out in three steps, i.e. decomposition of phosphate rock by nitric acid, followed by con-tinous ammoniation and carbonation proceeded in six specially designed reactors in series. The reaction in each reactor was controlled by adjusting the pH value of the slurry within a given range. The slurry was mixed with the finer portion of the dried product and granulated. Granulars ware dried in rotery kiln. The specification of the product was as follows: Na -18 - 20%; P2O5 = 13 - 15%; citrate solubility of P3O5 = 92 - 98%.