Preparing process of powdered MAP using urea phosphate mother liquor
During the production of urea phosphate using wet-process phosphoric acid and urea,a large amount of mother liquor is produced,which contains nitrogen,phosphorus,medium and trace elements.To efficiently utilize the urea phosphate mother liquor,it is mixed with concentrated phosphoric acid to prepare powdered MAP using a tubular reactor.The process flow is introduced;The indicators of the products obtained by mixing urea phosphate mother liquor with concentrated phosphoric acid in different proportions are analyzed,and the optimal mixing ratio is determined;The production cost and process advantages of MAP with this process are analyzed.The optimal mixing mass ratio of urea phosphate mother liquor and concentrated phosphoric acid is 1.0∶1.0.The nutrient content of the MAP product produced according to this ratio can reach more than 60%,meeting the premium products requirements of GB/T 10205-2009,and the product has good indicators such as water content,water solubility and dissolution rate;The cost of powdered MAP produced by this process is reduced by about 180 RMB Yuan per ton compared to using dilute acid slurry method;This process has low energy consumption and high economic benefits,providing a new technological approach for the comprehensive utilization of urea phosphate mother liquor.
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