METHOD FOR MAKING NITROGEN-POTASSIUM FERTILIZER CONTAINING CALCIUM NITRATE AND PRODUCTS THEREOF

摘要

The invention relates to a method for making NK-fertilizers basically from calcium nitrate fertilizers and potassium nitrate and homogeneous NK-fertilizer products. Calcium nitrate fertilizer is melted together with potassium nitrate to form a melt or suspension thereof which is particulated to form a homogeneous NK-fertilizer. The calci um nitrate fertilizer and the potassium nitrate are melted at 90-120 .degree.C and then heated to the desired particulation temperature being 160-190 .degree.C for grilling and 90-140 .degree.C for granulation. T he components are mixed in ratios giving a melt or suspension comprising 40-14 weight % calcium nitrate, 55-85 weight % potassium nitrate, 0.5-6 weight % water, 0-4 weight % ammonium nitrate and 0-5 weight % magnesi um nitrate.