| 摘要 |
PROBLEM TO BE SOLVED: To determine operation conditions of a fluidized bed treating device corresponding to properties of raw material by metrically formularizing properties such as average particle size, uniformity and apparent density of granular particles and determining constants contained in this numerical formula from the minimum granulation experiment. SOLUTION: In a method of granulating granular particles G using a fluidized bed granulator, based on the following formula, control parameters are controlled to obtain a granulated product of desired average particle size. Average particle size = a1×spray droplet diameter×effective control moisture value + b1 (wherein, a1 , b1 are constants determined by raw material). Therefore, by predicting average particle size of granular particles as a function of operating factors of the fluidizing bed treating device and a physical property recipe of powdery raw material, operation of the fluidized bed treating device is performed corresponding to desired physical properties of the granulated product.
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