Solid material comminution or disintegration – Apparatus – With temperature modification of material
Patent
1997-12-30
1999-05-11
Husar, John M.
Solid material comminution or disintegration
Apparatus
With temperature modification of material
241 791, 241117, B02C19/12;23/08
Patent
active
059019123
ABSTRACT:
A landplaster production method includes the steps of providing a supply of particulate gypsum material, drying the gypsum material by passing a stream of heated air thereby as the material is rotated, classifying and separating the dried particles into fines and coarse particles, collecting the suspended fines in a collector, passing the coarse particles to a grinder such as a roller mill for reducing the particles, and mixing the reduced particles with the collected fines for processing into landplaster. The elimination of fines from the feed to the grinder results in significantly greater production by increasing the efficiency of the grinder. Further, the dryer is modified to agitate the dried gypsum material so that it may be more easily introduced into the classifier/separator situated adjacent the drier discharge outlet.
REFERENCES:
patent: 5392998 (1995-02-01), Suessegger et al.
patent: 5433388 (1995-07-01), Hirz et al.
patent: 5531388 (1996-07-01), Brundiek et al.
patent: 5580002 (1996-12-01), Ward et al.
Husar John M.
United States Gypsum Co.
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