METHOD OF PRODUCING GRANULATED COMPLEX FERTILIZER BASED ON STRUVITE Russian patent published in 2024 - IPC C05F11/02 

FIELD: agriculture.

SUBSTANCE: invention represents a method of producing a granular compound fertilizer, which includes steps that are sequentially carried out at room temperature: mixing finely dispersed magnesium-ammonium phosphate, a binder and a mineral additive, adding a water additive to form a paste-like mixture, granulation by extrusion and subsequent drying, wherein the mineral additive used is carbamide, or ammonium nitrate, or potassium chloride, is added to the mixture of carbamide or ammonium nitrate in a total weight ratio of nitrogen: phosphorus in terms of P₂O₅ equal to 1:1, and potassium chloride in weight ratio of potassium: phosphorus in terms of P₂O₅, equal to 1:1, binder used is bentonite or 10%-gelatinised starch, the amount of bentonite binder is added 4.0–9.0% to the mixture with carbamide, 0–12.5% into a mixture with potassium chloride and 10±1% into a mixture with ammonium nitrate in terms of dry components; amount of binder of 10%-gelatinised starch is added to mixture with carbamide, 0–10% into a mixture with potassium chloride and 1–10% into a mixture with ammonium nitrate in terms of dry components.

EFFECT: invention enables to obtain an effective complex fertilizer with prolonged action.

1 cl, 3 dwg, 1 tbl, 11 ex