Wallboard slurry mixer configured for reducing water:stucco ratio

A slurry mixer, comprising:

• an upper wall and a lower wall, with an annular peripheral wall attached to and vertically separating said upper and said lower walls, said upper, lower and annular peripheral walls defining a chamber, an annular lid ring having a diameter and connected to and depending from an inner surface of said upper wall;
• at least one inlet in at least one of said upper wall and said lower wall;
• a circular disc with an upper surface disposed in said chamber;
• a drive shaft extending vertically from said upper surface and projecting from said upper wall;
• a lump ring secured to said upper surface, said lump ring having a diameter just smaller than said lid ring and being provided in three spaced, adjacent arcuate segments each extending approximately 120° of a circle defined by said lump ring;
• and
• wherein gaps are formed between ends of said adjacent segments and wherein an upper edge of said lump ring overlaps a lower edge of the lid ring to create a serpentine path for the slurry as the slurry migrates radially outwardly due to centrifugal force.