METHOD OF PRODUCTION OF AMMONIA-LIME FERTILIZER Russian patent published in 2005 - IPC

FIELD: chemical industry; agriculture; methods of production of mineral fertilizers.

SUBSTANCE: the invention is pertaining to the field of chemical industry and agriculture, in particular to the methods of production of mineral fertilizers. The ammonia-lime fertilizer is produced by mixing of an ammonia nitrate fusion cake with the crushed carbonate raw containing calcium carbonate or calcium carbonate and magnesium carbonate, by granulation of the mixture, by a drying and chilling of the product. At that before mixing with the fusion cake of ammonia nitrate the crushed carbonate raw is treated with ammonium hydrosulfate with concentration of 20÷45 mass % in the ratio of the mass shares of 1:(0.01÷0.3). The crushed carbonate raw has sizes of particles from 0.8 mm up to 1.5 mm, and the granulation is conducted in the drum-type granulator at 80-90°C. In the fertilizer the shares of calcium nitrate or calcium nitrate and magnesium nitrate are decreased and the losses of ammonia nitrogen at production of fertilizer are also reduced.

EFFECT: the invention ensures reduction of the shares of calcium nitrate or calcium nitrate and magnesium nitrate and the losses of ammonia nitrogen at production of the fertilizer.

3 cl, 12 ex, 1 tbl