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US 9,242,870 B2Granted
Method of forming a gypsum based product
AssigneeSaint-Gobain Placo
InventorsJean-Louis Mongrolle, Jean-Luc Germain
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Abstract
A method of forming a gypsum based product is disclosed. The method comprises the steps of: calcining a mixture of water and gypsum under conditions of raised temperature and pressure within a vessel to produce an alpha-hemihydrate slurry therein; passing the alpha-hemihydrate slurry from the vessel to a mixer for mixing with additional water to produce a settable slurry, which is arranged to set to form the gypsum based product.
Claims17
A method of forming a gypsum based product, the method comprising the steps of:
- calcining a mixture of water and gypsum under conditions of raised temperature and pressure within a vessel to produce an alpha-hemihydrate slurry therein;
- passing the alpha-hemihydrate slurry from the vessel to a mixer, adding additional water to the mixer, mixing the alpha-hemihydrate slurry and additional water to produce a settable slurry, which is arranged to set to form the gypsum based product.
A method of forming a gypsum based product, the method comprising the steps of:
- calcining a mixture of water and gypsum under conditions of raised temperature and pressure within a vessel to produce an alpha-hemihydrate slurry therein;
- passing the alpha-hemihydrate slurry from the vessel to a mixer for mixing with additional water to produce a settable slurry, which is arranged to set to form the gypsum based product, wherein the alpha-hemihydrate slurry is passed from the vessel to the mixer without undergoing a drying stage.
Dependencies are inferred from the claim text.