磷酸亚铁铵微肥的研制

MANUFACTURE OF MICRONUTRIENT FERTILIZERS FERROUS AMMONIUM PHOSPHATE

本文对高浓度微量元素复肥磷酸亚铁铵（ＦｅＮＨ４ＰＯ４，Ｈ２Ｏ）的生产方法及工艺条件进行了研究．以萃取磷酸，工业废硫酸亚铁及氨水为原料．通过正交试验推荐最优工艺条件是：磷酸和硫酸亚铁的摩尔比为１．５：反应温度为８０℃；反应时间为１小时：反应最终控制的ｐＨ值为６．在此条件下，铁的转化率可大于９５％；磷酸亚铁铵的生成率大于９０％．

In this peper, a new method of manufacturing the high content micronutrient compound fertilizers FeNH4PO4-H2O, was developed and the processing conditions were explored.The used feedstocks were extracted from phosphoric acid, spent ferrous sulfate and ammonia spirit. The optimum processing conditions obtained by the onthogonal design were as follows:the mole ratio of H3PO4 and FeSO4 was 1. 5, the reaction temperature was 80℃,the reaction time was 1 h, and the final pH value was 6. Under these conditions, ferrous conversion yield was higher than 95% and ferrous ammonium phosphate yield was more than 90%.