Method for producing anhydrous calcium nitrate powder

A method for producing an anhydrous powder, wherein the method comprises the step of subjecting a calcium nitrate solution having a water content of between 70 and 15 weight % of water and a calcium nitrate content of between 30 and 85 weight % to a drying step, CHARACTERISED IN THAT the calcium nitrate solution is subjected to a drying step performed at a temperature of between 200 and 300° C. in a turbo-dryer,

• wherein the turbo-dryer comprises a drum having a horizontal axis and being closed at opposite ends that are provided with openings for the introduction of the solution and a stream of dry air travelling in the same direction, and further comprises a heating jacket for heating the internal wall of the tubular body to a predetermined temperature, and a bladed rotor rotatable supported in the drum, and
• wherein the drying step produces the anhydrous calcium nitrate powder having
• a calcium nitrate content of between 92 and 99.9 weight %;
• a water content of between 0.1 and 8 weight %;
• and
• a particle size of between 0.05 and 1.5 mm;
• wherein the anhydrous calcium nitrate produced in the drying step has a calcium nitrate content and a water content adding up to 100 weight %.