We have not done anything with Chocolate powder specifically but have worked extensively in the food industry for other products similar in nature along with coating the material. I've included a few Case Histories of two of our customers who mix bakery goods, and other food products. Other customers are under Non-Disclosure Agreements that I cannot discuss.
Furthermore, I've included our Applications List for our Ribbon Blender for further reference.
If the material is free flowing and then we can stick with a Ribbon style agitator. However, if the liquid addition is viscous and thus makes the chocolate powder binding, then a Plow style agitator would be suited as this is designed for more dense materials and applications for slurries. Is the liquid addition of 29% by weight or by volume?
I still need to know what type of hours of operation they run so that I can determine their exact batch weight in order to determine the size of the machine and motor.
Furthermore, do you know if they are currently mixing in a Horizontal Mixer or any mixer for that matter?