Roller Granulation: A Dry Process Breakthrough for the 12-12-17 Formula
The 12-12-17 type nitrogen-phosphorus-potassium compound fertilizer refers to a medium-potassium high-concentration formula with nitrogen, phosphorus pentoxide, and potassium oxide contents of 12%, 12%, and 17%, respectively. This formula has a high proportion of potassium sources (usually potassium sulfate or potassium chloride), and the potassium salt crystals have high hardness, weak hygroscopicity, and poor self-adhesion, posing a unique challenge to the granulation process. The roller extrusion granulator, with its purely physical dry forming principle, has become the most cost-effective granulation solution for the 12-12-17 formula.
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