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磷酸铵简称磷铵,是我省贵溪化肥厂即将投产的复合肥料(年产能力24万吨),具有养分含量高,副成分少,施用方便等优点。又是我省主要作物专用肥的基本原料,其制造方法是用硫酸分解磷矿制得磷酸,用氨中和,即得磷酸铵[NH_4HPO_4],磷酸二铵[(NH_4)_2HPO_4]。磷酸铵肥料,实际是磷酸一铵和磷酸二铵的混合物,为调整这种复肥的氮磷比例,一般制成以含磷酸一铵为主,或磷酸二铵为主,前一种(N—P_2O_5—K_2O)为12—52—0,后一种为18—46—0。目前,贵溪化肥厂生产磷铵主要是磷酸二铵[(NH_4)_2HPO_4]。
Ammonium phosphate, abbreviated as ammonium phosphate, is a compounded fertilizer to be put into operation soon by Guixi Chemical Fertilizer Plant in our province (with an annual capacity of 240,000 tons), with the advantages of high nutrient content, less accessory ingredients and convenient application. It is also the main raw material of special fertilizer for main crops in our province. Its manufacturing method is to decompose phosphate rock with sulfuric acid to produce phosphoric acid, neutralize with ammonia to obtain ammonium phosphate [NH 4 HPO 4] and diammonium phosphate [(NH 4) 2 HPO 4]. Ammonium phosphate fertilizers, in fact, is a mixture of monoammonium phosphate and diammonium phosphate. In order to adjust the proportion of nitrogen to phosphorus in this compound fertilizer, it is generally made mainly of monoammonium phosphate or diammonium phosphate. The former (N -P_2O_5-K_2O) is 12-52-0, the latter is 18-46-0. At present, the production of ammonium phosphate in Guixi Fertilizer Plant is mainly diammonium phosphate [(NH_4) _2HPO_4].