Preparation process of efficient humic acid diammonium phosphate

The invention discloses a preparation process of efficient humic acid diammonium phosphate, which belongs to the field of novel fertilizers and in particular relates to a production process for preparing an efficient humic acid diammonium phosphate product through modifying diammonium phosphate in the traditional method. The preparation process comprises the following steps of: (1) utilizing 30-50wt% of humic acid ammonium containing water soluble humic acid as an activating agent, and adding the powder or paste humic acid ammonium to a returning charge according to 10-20wt% of adding amount in the returning charge part of the course of producing diammonium phosphate by adopting the traditional method; and (2) uniformly mixing the diammonium phosphate returning charge containing the added humic acid ammonium, then adding the diammonium phosphate returning charge into a cylinder for pelletizing, pelletizing and aminating the diammonium phosphate returning charge together with pre-neutralizing slurry, and drying. The preparation process of the efficient humic acid diammonium phosphate has the advantages that because the humic acid ammonium containing high water soluble humic acid is added in the returning charge part in the production process of the diammonium phosphate by utilizing the traditional method, the physiological activity of the humic acid is not destroyed, the traditional production process of the diammonium phosphate is not affected, the production cost of the diammonium phosphate can be effectively reduced, and the obtained efficient humic acid diammonium phosphate has excellent agricultural effect and ecological effect.