Powder Blending In Ribbon Blender

Since blending involves the flow of materials, blending mechanisms are affected by the same properties that affect flow. Flowability of bulk solids depends upon factors such as particle size and size distribution, particle shape, bulk density, all of which affect blending. The powder materials to be blended are charged in the mixing vessel, with a fill up volume ranging from 40 to 70 percent of the gross volume. Addition of liquids, if any, is through an optional spray piping system provided in the top portion of the blender.

The ribbon agitator is operated at an appropriate speed depending on the size of the blender and the application. The geometry and rotation of the helical ribbon creates a counter-current axial movement and radial movement resulting in homogenous blending within 15 to 20 minutes, with about 90 to 95 percent homogeneity. After completion of blending, the material is discharged from one or more discharge valves located at the bottom of the vessel. The blender’s versatility to perform multiple functions such as heating, cooling, coating, and other processes besides mixing make it a popular blender.