PILOT PLANT STUDY OF GRANULATED DIAMMONIUM PHOSPHATE FERTILIZER

Shanghai Research Institute of Chemical Industry TAI U-FA; CHEN TSIN--YD

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PILOT PLANT STUDY OF GRANULATED DIAMMONIUM PHOSPHATE FERTILIZER

更新时间：2025-12-16

- PILOT PLANT STUDY OF GRANULATED DIAMMONIUM PHOSPHATE FERTILIZER
- CIESC Journal Issue 3, (1965)
- 作者机构：
  
  上海化工研究院,上海化工研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 September 1965，
  
  Published：25 September 1965
- 稿件说明：
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Shanghai Research Institute of Chemical Industry TAI U-FA, CHEN TSIN--YD. PILOT PLANT STUDY OF GRANULATED DIAMMONIUM PHOSPHATE FERTILIZER[J]. CIESC Journal, 1965, (3).
DOI：

Shanghai Research Institute of Chemical Industry TAI U-FA, CHEN TSIN--YD. PILOT PLANT STUDY OF GRANULATED DIAMMONIUM PHOSPHATE FERTILIZER[J]. CIESC Journal, 1965, (3). DOI：

摘要

本文介绍以氨与未经浓缩的湿法磷酸为原料制取18—46磷酸铵肥料的工艺条件。作者研究了磷酸和氨的中和度与肥料中氮磷比例

料浆的液固比

料浆中水分蒸发和氨的逸出等关系。同时研究了造粒过程、干燥炉带出气中粉尘的回收、成品干燥等工艺条件

以及设备构造。作者认为最适宜的工艺条件是:磷酸浓度为P_2O_532％

磷酸与氨的中和度为1.78。造粒过程的返料粒度组成在-6+12目占40％、-12目占60％时

返料量为成品量的11倍左右。并确定了中和槽、卧式双轴造粒机、迴转干燥炉、冲击洗滌器等设备结构与材料。

Abstract

This is to introduce a process for making diammonium phosphate fertilizer of 18-46 in which the raw materials used are dilute wet-process phosphoric acid and ammonia. The authors have studied the degree of neutralization of phosphoric acid with ammonia in relation to the ratio between N and P2O5 in product

the ratio between the liquid and solid phases in paste

the amount of water and ammonia evaporated from paste

etc.. At the same time

the authors have also studied the pelletizing and drying of the product

the recovery of dust from the tail gas

as well as the construction of various equipments. From their studies

they have found the following results. I. The optimum conditions for making diammonium phosphate fertilizer of 18-46 grade are as follows. a. The optimum concentration of phosphoric acid is 32% P2O5

b. the proper degree of neutralization of phosphoric acid with ammonia is at 1.78

and c. in pelletization

the recycling material which is 40% -6 to +12 mesh

60% -12 mesh

and the quantity ratio is about 11 times of the product. II. They have also determined the construction and the materials for making the reactor

the pelletizer of horizontal type with double axis

the rotary dryer

and the scrubber of impingement type

etc..

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