中低品位磷矿生产工业级磷酸二铵的工艺研究

Production of industrial diammonium phosphate with mid-low-grade phosphate rock

利用磷酸分解中低品位磷矿生产湿法磷酸.通过湿法磷酸与有机碱形成复合物沉淀,实现了磷酸与杂质离子的高效分离,从而得到工业级磷酸二铵.本工艺使中低品位磷矿能得到高效利用,为工业磷酸及其磷酸盐的生产提供了一种有效的方法.

The industrial-grade diammonium phosphate was prepared by decomposition of mid-low-grade phosphate rock with phosphoric acid, followed by added sulfuric acid to produce crude phosphoric acid, actualizing effective separation of impurties from complex-deposition of phosphoric acid through adding organic base, and aminating the complex-deposition. The techniques offer an effective method to utilize mid-low-grade phosphate rock and produce industrial-grade phosphate.