Patent ID: 6059444
Filing Date: 2000-05-09
Classification: B01F,B28C

Abstract:
Apparatus for mixing calcined gypsum comprising a top cover and a disk-shaped rotor comprising a rotor body with teeth along the periphery for mixing calcined gypsum with a metered amount of water and other ingredients to form a gypsum slurry, wherein the top cover contains a plurality of low pressure water jets and at least one high pressure water jet, with said high pressure water jet being aligned perpendicularly over the juncture of the rotor teeth and the rotor body, such that a vertical line defined by the high pressure jet and the juncture is perpendicular to a horizontal plane defined by the surface of the disk-shaped rotor, with a portion of the metered water introduced into the apparatus through the high pressure jet and the balance of the water is introduced into the apparatus through the low pressure jets, whereby the formation of lumps of gypsum at said juncture is substantially reduced.