Blender incorporates a conical-shaped agitator design combining helical ribbon and screw designs. Agitator is mounted vertically and rotates at close clearance to the conical vessel walls. The agitator moves materials being mixed in axial and radial directions. Outer helix moves material from the walls up and the screw moves materials from the bottom to the top of the vessel. This combination results in short mix cycle at lower cost. Optional features include stainless steel type 304 or 316 wetted parts, vacuum or pressure design, a thermocouple for temperature indication and discharge valves to suit the application. Charles Ross & Son Company 710 Old Willets Path Hauppauge, NY, 11788