Review on Fluidized Bed Mixing Technology and Application

Twin paddle agitators counter-rotating within 2 u-shaped troughs produce a fluidizing zone during which airborne materials intersperse quickly with negligible degradation.

Dry feed in raw or pelletized kind is often pre-blended capacity mixer. The wet blending method adds oils and/or molasses to rolled oats, barley, pellets and “bull ration” calf feed for nutrition and palatability as well as dust management. 

To initiate a mixing cycle, AN operator enters a preprogrammed recipe at a plant workstation. Individual ingredients, hold on in outdoor granaries, are transported by chain drag conveyors to the same dry mixer for pre-blending. 

Blended batches discharged into bins are then conveyed by either of two drag chain conveyors to the fluidized bed mixer. Load cells supporting the mixer transmit weight gain information to a programmable logic controller (PLC), which stops the conveyor once the preset batch weight has been gained.

Once mixing begins, a fluid volume of oil or molasses corresponding to three to ten percent of the dry mixture weight is automatically metered. Capacity vessel and gravity discharged into the top center intake of the fluidized bed mixer.

The machine’s fluidizing effect is achieved by twin paddle agitators rotating at thirty six revolutions per minute within twin U-shaped troughs at the bottom of the blending vessel. The counter-rotating agitators cause material from the troughs to become airborne along the centerline of the vessel where it intersperses rapidly with liquids sprayed into the “fluidized zone.”

Mixing cycle times range from 10 seconds to 2 minutes depending on recipe.  

Full-length, drop-bottom gates open to discharge blended batches into a hopper, which feeds a filling line for plastic fiber bags. Immediately after the bottom gates close, dry premix is loaded into the mixer, a pump refills the overhead liquid hopper and a new cycle begins.

A drag chain conveyor (foreground) moves batches of dry feed to the fluid bed mixer (on platform). Below the mixer, a hopper receives the blended batches and releases them to a bagging machine filling plastic fiber bags.

We at KERONE have a team of experts to help you with your need for fluid bed drying and mixing systems in various products range from our wide experience.

Scroll to Top