Method for producing calcium nitrate granules at controlled humidity and temperature conditions using fluidised bed granulators

A process for producing calcium nitrate granules where a calcium nitrate melt is sprayed into a re-circulating bed of a first fluidised bed granulator (10), wherein the re-circulating bed is supplied with air that has been conditioned to a relative humidity of less than 30% at 40°C and heated to a t...

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Bibliographische Detailangaben
Hauptverfasser:	EYGELAAR, JOHANNES PETRUS GYSBERT, MORRIS, WILFRED ROY, RABIE, DIRK RENIER HENDRIK
Format:	Patent
Sprache:	eng
Schlagworte:	AMMONIA CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF CYANOGEN EXPLOSIVES EXPLOSIVES OR THERMIC COMPOSITIONS FERTILISERS FERTILISERS CHARACTERISED BY THEIR FORM INORGANIC CHEMISTRY MANUFACTURE THEREOF MATCHES METALLURGY MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05 MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS NITROGENOUS FERTILISERS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING USE OF SINGLE SUBSTANCES AS EXPLOSIVES
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Beschreibung
Zusammenfassung:	A process for producing calcium nitrate granules where a calcium nitrate melt is sprayed into a re-circulating bed of a first fluidised bed granulator (10), wherein the re-circulating bed is supplied with air that has been conditioned to a relative humidity of less than 30% at 40°C and heated to a temperature of between 60°C and 100°C. Calcium nitrate granules formed in the first fluidised bed granulator (10) are introduced to a primary cooler (38) in the form of a second fluidised bed where the granules are cooled to from 50°C to 60°C by conditioned air. The granules are sorted in a sorter (42) and then cooled in a secondary cooler (48) to a temperature of less than 40°C, before being bagged. The granules so produced are hard and dry and do not break down easily during handling.