METHOD OF OBTAINING GRANULATED COMPLEX MINERAL FERTILIZERS Russian patent published in 2008 - IPC C05B19/00 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of obtaining granulated phosphorous-containing complex mineral fertilisers, which can be broadly used for increasing wheat and other agricultural cultures productivity. Method of obtaining granulated complex mineral fertilisers includes mixing of phosphorous-containing component and potassium compound, granulating and drying of product. As initial raw material phosphorus flour, which is mixed with potassium chloride and boric acid in following ratio, wt %: phosphorite flour 68 potassium chloride 30, boric acid 2, then mixture is moistened to 6% and subjected to granulating and drying at temperature 150-200°C, with further obtaining of fertiliser, which contains nutrition elements in amount, wt %: P₂O₅ - 10-12, K₂O - 13-16, B - 0.25, CaO - 20, MgO - 2, Water - 1.4.

EFFECT: obtaining mineral fertiliser which efficiently affects increase of agricultural cultures productivity on all kinds of soils.

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