In the case of the basic dipping process of the diammonium phosphate plant at Handan Phosphate Fertilizer Plant, it has been successfully converted to ammonium phosphate. Due to changes in the market situation in previous years, Suifu Phosphate Fertilizer Plant converted 800,000 tons/year of heavy calcium plant to granular ammonium phosphate. At that time, there was a large demand for diammonium phosphate in the country. Despite the unsatisfactory appearance of diammonium phosphate, diammonium phosphate was still sold on the market with excellent internal quality. With the recent increase in the production capacity of phosphate fertilizers in the country, the market competition is extremely fierce and demands higher quality of the appearance of diammonium phosphate. For this purpose, Qinfu Phosphate Fertilizer Plant and the research group of the School of Chemical Engineering of Guizhou University jointly tackled the issue. At the beginning of this year, a special set of ammonium phosphate granulation equipment and process technology that changed the characteristics of the slurry were developed, which not only solved the uniformity and roundness of the product particles. Difficulties, and can save 3 tons of steam per hour.

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