Application of thermal analysis to the investigation of the reaction of ammonium nitrate melt with solid zinc oxide

Abstract

Metallurgical wastes are often used in the production of fertilizers with zinc as a micro-element. They contain, besides zinc oxide, high coneenfcrations of iron, calcium, magnesium oxides and a large number of other components, which hinder the observation and explanation of the resulting reactions and compounds. The subject of this paper is the application of thermal and chemical analysis and x-ray powder diffraction in the investigation of the reaction of ammonium nitrate melt with solid zinc oxide and the characterization of the formed compounds. The results obtained show that oxide reacts with ammonium nitrate forming water-soluble zinc nitrate hexahydrate - Zn(NO3)2·6H2O andless water - soluble compound, which has been characterized as complex zinc nitrate hydroxide hydrate - Zn5(NO3)2(OH)8·2H 2O. Their content increases with the Increase of zinc oxide concentration in the system. © 1989.