Blending Heavy Duty Single Pedestal IBC Blender Small, Laboratory, Medium and Large Scale Blending and Mixer Solutions The concept is simple. The same Intermediate Bulk...
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Tip Speed – Establishing Optimal Blending Speed
Tip speed (angular velocity) is a constant that can be used to establish an
initial blending speed for a given bin geometry. The blender speed may
need to be adjusted upon further testing but is a good starting point. The tip
radius is the distance perpendicular to the blender rotational center
measured to the furthest top bin corner.
Formula
TS = 2100 in/min tip speed constant
TR = Tip Radius (in inches)
RPM = blender rotational speed (in revolutions per minute)
PI = 3.1415
RPM = TS/(PI x TR x 2)
These speed values are approximate based on average density materials 40#/ft3, good flow properties, and particle sizes within 40% of each other. This formula is not relevant for IBC capacities less than 200 liters.
Adjusting for less than ideal product
Product density influence on blend speed
*Increase blend speed for denser products
*Decrease blend speed for lighter products that are prone to aeration.
Product flow properties influence on blend speed
*Decrease blend speed for products with poor flow properties
*Increase blend speed for products with excellent flow properties
Particle size influence on blend speed
Particle size variation over 40% – blend speed change has little effect. Draw blend samples much morefrequently (at least every minute of blend time) during initial blend testing because batches with large particle size variation can de-blend if run too long.
