METHOD OF GRANULATED MULTI-COMPONENT FERTILIZERS PRODUCTION

摘要

The invention concerns a method of production of granulated multi-component fertilisers based on the chemical reaction of compounds, which are a source of plant nutrients, with the simultaneously continuous production of granules. The source for the predominant part of phosphate components is a product of the reaction of ground phosphorite and extractive trihydrogen phosphate acid prepared in the presence of sulphatic anions, in which the share of phosphoric oxide from the extractive trihydrogen phosphate acid and ground phosphorite is between 0.6 : 1 to 2.3 : 1, whilst the amount of water drawn into the reaction mixture by all the reaction components corresponds to 5.5 to 34.5 of the percentage weight of the whole reaction mixture and the total content of sulphatic anions drawn into the decomposing reaction represents 0.3 to 9.8 of the percentage weight of the whole reaction mixture. The source of nitrogen components is ammoniac of ammonium nitrate and/or ammoniac and/or ammonium sulphate. The source of potassium components is potassium chloride or sulphate. Sulphuric and/or phosphoric acid are further added to the technological process at a quantity at minimum corresponding to neutralisation of the free ammoniac drawn into the system.