The plow separates and lifts the product into three-dimensional motion, while the number and arrangement of the tools insure agitation back and forth along the length of the vessel. When the material flows past the high-speed choppers, it is cut and scattered by the blades, achieving uniform mixing in short time. The choppers help to remove lumps in the raw material, chop pasty additives, and prevent formation of agglomerates on liquid addition.