| 摘要 |
PROBLEM TO BE SOLVED: To provide a wet granulation method for an inorganic powder containing quick lime capable of reducing the swelling and disintegration of the granulated pellets and reducing loss of nitrogen existing in a form of cyanamide. SOLUTION: The wet granulation method for an inorganic powder containing quick lime comprises the steps of granulating the inorganic powder containing quick lime using water and subsequently drying the resulting pellets under vacuum. Preferably, the method comprises at least one embodiment selected from embodiments that the vacuum-drying is carried out at a temperature of 50 to 80°C and at a pressure of not higher than 3 kPa, the powder containing quick lime is lime nitrogen powder and the average particle size of the granulated pellets to be vacuum-dried is in a range of 1 to 10 mm and the quick lime content in the lime nitrogen powder is 5 mass% or higher. COPYRIGHT: (C)2008,JPO&INPIT
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