料浆法浓缩磷铵料浆的氨二次中和生产DAP研究

研究了中品位磷矿制湿法磷酸得到的浓缩磷铵料浆进行氨二次中和的特性，在实验模式装置上，确定了该料浆用氨二次中和生产磷酸二铵的管式反应器结构，设计参数及氨二次中和的工艺条件。

Study of DAP Production by Secondary Neutralization of Slurry Process Concentrated Ammonium Phosphate Slurry with Ammonia

The paper describes characteristics of secondary ammonia neutralization of concentrated ammonium phosphate slurry obtained from wet process production of phosphoric acid based on medium-grade phosphorus ore. On the experimental plant, the structure and design parameters of the tube reactor where concentrated slurry neutralizes with ammonia to produce DAP.as well as the secondary neutralization process conditions have been determined. According to experimental results,the DAP tube reactor was designed. The tube reactor has passed the 72-hour performance test in a 30,000 t/a MAP plant.the production has proved to he stable and reliable,and expected objectives have been realized Now,an enlarged tube reactor is operating in a 60,000 t/a DAP plant.