Gypsum grinding mill and method of grinding gypsum

A method of grinding gypsum, comprising:

• providing a grinding media to a grinding chamber of a housing of a gypsum grinding mill, the housing comprising a generally cylindrical side wall, a top wall disposed at a first end of the generally cylindrical side wall, and a bottom wall disposed at a second end of the generally cylindrical side wall, opposite the first end;
• providing an unground gypsum material to the grinding chamber;
• rotating an agitator within the grinding chamber, the agitator comprising a rotatable shaft extending generally longitudinally through the grinding chamber and a plurality of agitator bars extending from the rotatable shaft;
• fluidizing the unground gypsum material by flowing air from a blower, through a heat exchanger configured to cool the air from the blower, into an air chamber of the housing, and through a fluidization pad in the housing and into the grinding chamber;
• and
• discharging a ground gypsum product from the grinding chamber through a product discharge port formed in the generally cylindrical side wall of the housing.