| 摘要 |
A mixing vessel with a vertical axis has a plurality of rotatable screw conveyors extending vertically through the top of the vessel into its mixing chamber and a stirrer arranged revolvably about the vessel axis to sweep over the wall of the mixing chamber as it revolves. The stirrer is so associated with the screw conveyors that it moves a mass to be mixed in the chamber towards the screw conveyor means, and may be constituted by one of the screw conveyors. |
