Mixing apparatus for fluids.

摘要

Apparatus for mixing a fluid comprises a mixing tub (12) having a substantially circular horizontal cross-sectional shape, and an agitator assembly (14) associated with the mixing tub. The agitator assembly includes a drive shaft (78) having upper (80) and lower (82) agitators attached thereto. The drive shaft is located within the tub and has a substantially vertically oriented axis of rotation (76). The lower agitator (82) moves fluid generally downwardly through a radially inner cross-sectional area defined within a first radius (84) swept by the lower agitator. The upper agitator (80) moves fluid within said first radius (84) generally radially outwardly as that fluid is moved generally downwardly by the lower agitator (82), and moves fluid outside the first radius (84) generally upwardly. A plurality of foraminous baffles (127) are mounted within the tub for reducing rotational motion of the slurry within the tub about the generally vertical axis (76) of the agitator drive shaft (78).