Spray granulation of temperature-sensitive materials in a spouted bed

Demands for temperature-sensitive materials used in this project include a ball-like particle shape without edges or corners, a narrow particle size distribution, high particle strength and as most important aspect the avoidance of dust formation. The produced granules are later mixed with other functional materials and need therefore also a good miscibility with those materials.

Spray granulation seems to be a promising process which can be used to produce granules of temperature-sensitive materials in a continuous way with a comparable low input of energy and additional substances and without the release of dust. The flow pattern in a spouted bed allows an improved heat and mass transfer compared to the standard fluid bed process. The aim of the project is to keep a low temperature in the bed to avoid damage of the temperature-sensitive materials while keeping high particle strength. To reduce the danger of dust release during post processing, the particles can be coated after granulation whereby a suitable coating mixture shall be found within this project.

Stichworte

• Discrete Element Modeling
• Dynamische Simulation
• Spouted Bed

Publikationen

• Pietsch, Swantje and Heinrich, Stefan and Karpinski, Katja and Müller, Michael and Schönherr, Michael and Kleine Jäger, Frank: CFD-DEM modeling of a three-dimensional prismatic spouted bed. Powder Technology: S. in press, 2017. , DOI: 10.1016/j.powtec.2016.12.046