Building granules from powder
GFG - continuous fluid bed
Powder is fed continuously into the chamber. In the first chamber part liquid is sprayed into the bed and the powder is agglomerated. The wet granules are dried and cooled in the following chamber parts.
WSG - Batch fluid bed
The process steps in the batch unit are separated by time. After charging the fluidized powder is wetted until agglomeration occurs. When the desired grain size is reached, spraying is stopped and drying starts. After a cooling step the product is discharged and the next batch can start.