How to granulate magnesium sulfate monohydrate?

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During the high-temperature evaporation of bittern (the mother liquor obtained after salt production from seawater), magnesium sulfate (MgSO4) crystallizes out in the form of magnesium sulfate monohydrate – MgSO4.H2O. After filtration under pressure and drying, it is sold as a magnesium-sulfur fertilizer. Magnesium sulfate monohydrate obtained after drying through the above process is generally in a powdered form, which makes it inconvenient to use; therefore, customers request that it be produced in granular form. There are two methods for producing granular monohydrate magnesium sulfate: drum granulation and extrusion granulation. In drum granulation, the dried powdered monohydrate magnesium sulfate is wetted and rolled in a drum to form granules; after granulation, it needs to be dried further and then screened to obtain qualified products. The strength of these granules is insufficient, making them prone to breaking ； Extrusion granulation involves extruding powdered monohydrate magnesium sulfate into strip shapes, which are then crushed and screened to obtain qualified products; such particles have high strength. The above two granulation methods have high production costs; we are now looking for a new granulation method that requires less energy. Please help us, dear experts. Material: The main component is MgSO4.H2O (65–70%), with 12–15% moisture; the remainder consists of small amounts of sodium chloride, magnesium chloride, and potassium chloride. The temperature of the material is at room temperature. The particle size of magnesium sulfate monohydrate is 300–400 mesh.