GRANULAR UREA; ADVANTAGES AND PROCESSES

Urea is a nitrogen fertilizer increasingly used in Asia; it is processed by one of two methods, granulation and prilling. The report begins by summarizing reasons why granular urea is preferable to prilled urea. Granular particles are well-suited for blending and for use in coating processes, feature high abrasion resistance, and their production entails relatively few environmental hazards. Next, the three major granulation processes are reviewed; these are TVA Pan Granulation, Norsk Hydro Pan Granulation, and Fisons Granular Urea Process. The report provides information on converting a prilling process to a granulation process, and summarizes both wet scrubber and dry collection methods for solids recovery. Numerous tables and figures accompany the text.