Does anyone know anything about the spray granulation process used to produce fully water-soluble compound fertilizers?
Thread Content
It is said that: 1. Phosphoric acid filtration technology is used to remove insoluble substances from the phosphoric acid, after which purified phosphoric acid is used as the raw material； 2. Use an appropriate amount of nitric acid. My questions are: 1. Even if phosphoric acid is physically filtered, some insoluble substances will remain after the filtered phosphoric acid is neutralized; how can this be resolved? 2. Is it still necessary to use urea? 3. How to solve the problem of easy caking of the product? Hope the experts can give some advice!
We have done this before, not to filter phosphoric acid, but the ammonium phosphate slurry
Which manufacturer are you from? What is the content level?