Apparatus for mixing particulate material in a liquid

Apparatus for mixing liquid and particulate matter comprising a mixing bowl having a vertical axis, means for rotating said bowl about its axis at a speed sufficient to cause a liquid therein to be moved by centrifugal force up the inner surface of the bowl to the rim thereof, means for introducing a liquid into said bowl at a rate that permits an unbroken film of liquid to form on the inner surface of the bowl, means for introducing particulate material in a path having a component of radial motion into said film of liquid and above the place where said liquid enters said bowl, means for collecting the mixed liquid and particulate materials at the rim of said bowl, and further comprising a first shear ring on the rim of said mixing bowl and a coacting stationary shear ring opposite said first shear ring for shearing the mixed liquid and particulate matter to increase its uniformity.

Apparatus for mixing liquid and particulate matter comprising a mixing bowl having a vertical axis, means for rotating said bowl about its axis at a speed sufficient to cause a liquid therein to be moved by centrifugal force up the inner surface of the bowl to the rim thereof, means for introducing a liquid into said bowl at a rate that permits an unbroken film of liquid to form on the inner surface of the bowl, means for introducing particulate material in a path having a component of radial motion into said film of liquid and above the place where said liquid enters the bowl, means for collecting the mixed liquid and particulate material at the rim of said bowl, said means for introducing a liquid into said bowl comprising means forming a chamber below said bowl, openings in the bottom portion of said bowl communicating into said chamber, and means for pumping said liquid into said chamber and through said openings into the bottom of said bowl, said apparatus further comprising a disc supported within the bottom portion of said bowl in a position which allows the disc to assist liquid which is introduced into the bowl beneath the disc to form a film on the inner surface of the bowl above the disc.

Apparatus for mixing liquid and particulate matter comprising a mixing bowl having a vertical axis, means for rotating said bowl about its axis at a speed sufficient to cause a liquid therein to be moved by centrifugal force up the inner surface of the bowl to the rim thereof, means for introducing a liquid into said bowl at a rate that permits an unbroken film of liquid to form on the inner surface of the bowl, means for introducing particulate material in a path having a component of radial motion into said film of liquid and above the place where said liquid enters said bowl, means for collecting the mixed liquid and particulate material at the rim of said bowl, a first shear ring on the rim of said mixing bowl and a coacting stationary shear ring opposite said first shear ring for shearing the mixed liquid and particulate matter to increase its uniformity, and a stationary cover plate mounted over said mixing bowl, said stationary shear ring being on said cover plate.

Apparatus for mixing liquid and particulate matter comprising a mixing bowl having a vertical axis, means for rotating said bowl about its axis at a speed sufficient to cause a liquid therein to be moved by centrifugal force up the inner surface of the bowl to the rim thereof, means for introducing a liquid into said bowl at a rate that permits an unbroken film of liquid to form on the inner surface of the bowl, means for introducing particulate material in a path having a component of radial motion into said film of liquid and above the place where said liquid enters said bowl, means for collecting the mixed liquid and particulate material at the rim of said bowl, and a first shear ring on the rim of said mixing bowl and a coacting stationary shear ring opposite said first shear ring for shearing the mixed liquid and particulate matter to increase its uniformity, each shear ring containing circular teeth which are separated by circular grooves.