| 摘要 |
In a granulation process only a small proportion of the material being treated is at any time subjected to a wetting and collision followed by a very fast drying whereby harmful increase of moisture content in the powder is avoided. By the process the particles to be granulated are sprayed with granulation liquid, brought into mutual contact, and dried while influenced by a fast swirling upward gas stream in a vertical pipe. The fast drying prevents excessive penetration of coating liquid into the interior of the particles. The low moisture content during the process involves operational advantages and allow for interruption and re-start of the operation at any time. <IMAGE> |
