Arrangement for mixing powder with liquid

In an apparatus for continuously mixing liquid and powder together to form an at least substantially homogenous mixture, comprising a housing, a rotor provided with guide means and journalled for rotation about a vertical axis in said housing, means for delivering powder to the rotor, and means for delivering liquid to the housing and for dispersing the liquid so as to form a liquid annulus therein, the guide means provided on said rotor being configured to throw the powder outwards and into the liquid annulus as the rotor rotates;

• the improvement wherein the rotor (7) has an inverted conical peripheral surface (9);
• the housing (1) has a stationary conical surface (16) which surrounds the peripheral surface of the rotor and which has an extension (16a) which extends upwardly beyond the peripheral surface of said rotor;
• said liquid delivery means (22) discharges into a gap (19) defined between the conical housing surface (16) and the conical rotor surface (9), said rotor surface (9) being configured to impart rotational movement to said liquid such as to form a rotating liquid film on the conical wall of said housing;
• the guide devices (10) on the rotor being configured to throw powder towards and in contact with the liquid film on said extension (16a) of the conical housing wall (16) above the conical peripheral surface of said rotor;
• and wherein a mixture outlet is provided above said conical surface of said housing.