Method for producing diammonium phosphate by concentrating semi-acidic slurry and secondary ammonization and concentration integrated device

The invention discloses a method for producing diammonium phosphate by concentrating semi-acidic slurry. Diammonium phosphate is prepared by using dehydrate wet-method phosphoric acid as a raw material and comprising the steps of concentrating, settling, separating, aminating for four times, drying...

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Hauptverfasser:	FENG YONGGANG, MAO KEWAN, LI JIAHONG, MEI SHENGMING, YE SHAOHUA, SHENG YONG, FENG ZHONGGUO, YANG LIANTIAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PHOSPHATIC FERTILISERS
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creator	FENG YONGGANG MAO KEWAN LI JIAHONG MEI SHENGMING YE SHAOHUA SHENG YONG FENG ZHONGGUO YANG LIANTIAN
description	The invention discloses a method for producing diammonium phosphate by concentrating semi-acidic slurry. Diammonium phosphate is prepared by using dehydrate wet-method phosphoric acid as a raw material and comprising the steps of concentrating, settling, separating, aminating for four times, drying and screening. The invention also discloses a secondary ammonization and concentration integrated device used in the process which not only can obtain a traditional-method diammonium phosphate composite fertilizer in nitrogen and phosphorus ratio of 0.32-0.40, but also can further reduce the ammonia consumption and energy consumption, thereby being suitable for high-quality phosphorus ores and phosphorus concentrates formed by the single repeated selection magnesium treatment of mid-low quality phosphorus ores with high content of impurities. The secondary ammonization and concentration integrated device is more energy-saving and environment-friendly and simplifies the process equipment.
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Diammonium phosphate is prepared by using dehydrate wet-method phosphoric acid as a raw material and comprising the steps of concentrating, settling, separating, aminating for four times, drying and screening. The invention also discloses a secondary ammonization and concentration integrated device used in the process which not only can obtain a traditional-method diammonium phosphate composite fertilizer in nitrogen and phosphorus ratio of 0.32-0.40, but also can further reduce the ammonia consumption and energy consumption, thereby being suitable for high-quality phosphorus ores and phosphorus concentrates formed by the single repeated selection magnesium treatment of mid-low quality phosphorus ores with high content of impurities. 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language	chi ; eng
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subjects	CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PHOSPHATIC FERTILISERS
title	Method for producing diammonium phosphate by concentrating semi-acidic slurry and secondary ammonization and concentration integrated device
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