| 摘要 |
<p>The invention relates to a method of manufacturing free-flowing ammonium nitrate particles and an anticaking coating. Prior to final drying and storage the ammonium nitrate particles are coated by spraying with an aqueous solution of at least one inorganic salt, forming salt hydrates with at least one molecule crystal water. The particles are dried to a water content « the maximum amount of crystal water that can be bound by said inorganic salts. An aqueous solution, preferably of magnesium- and/or calcium nitrate is sprayed on the ammonium nitrate particles in an amount corresponding to 0.1-3 weight % of the coated particles. When magnesium nitrate is applied, the ammonium nitrate particles are dried to a water content « the water content in a coating of Mg(NO3)2.6H2O corresponding to a ratio mol H2O/mol Mg « 6. The invention is especially applicable on ammonium nitrate crystals. The anticaking coating comprises at least one inorganic salt having at least one mol of crystal water, preferably magnesium nitrate having 2-6 mols of crystal water.</p> |
