A mixing drier in the form of a spherical mixer (1) comprises an upper vessel shell (2) and a lower vessel shell (3) which can be closed together in a separation plane (T). A stirrer (7) having a stirrer shaft (11) and stirring elements (12, 12', 12') is affixed to the upper vessel shell (2). The stirrer axis (R) is inclined to the vertical (V). The separation plane (T) is perpendicular to the stirrer axis (R). The stirring elements (12, 12', 12') are located below the separation plane (T). A hinge (14) is located in the separation plane (T) and allows the vessel (B) of the spherical mixer (1) to be opened for cleaning.
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