US4943308A Method of producing fertilizer granules
The invention concerns a method of producing fertilizer granules containing urea and ammonium sulphate by granulating a mixture containing urea ammonium sulphate and water which is characterized in that the ammonium sulphate is completely dissolved in an aqueous urea solution with a urea concentration of 70 85% by weight the resulting solution is thickened to a dry content of 92 97% by