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US 10,183,890 B2Granted
Method of curing a gypsum calcination product
AssigneeSaint-Gobain Placo
InventorCedric Biguenet
Life of this patent
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Abstract
A method of conditioning stucco comprises the steps of supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and conditioning the stucco particles at a temperature of at least 100° C. and a humidity of at least 70%. During the step of conditioning the stucco particles, the bulk density of the stucco particles within the reaction vessel is at least 1 g/cm3.
Claims15
A method of conditioning stucco comprising the steps of:
- supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate dihydrate and at least one of calcium sulphate hemihydrate and calcium sulphate anhydrite;
- and
- conditioning the stucco particles at a temperature of at least 100° C. and a humidity of at least 70%,
- wherein during the step of conditioning the stucco particles, the stucco particles are held statically within the reaction vessel, such that the bulk density of the stucco particles within the reaction vessel is at least 1 g/cm3;
- and further wherein the humidity of at least 70% is provided by the release of chemically-bound water molecules from the dihydrate particles.
2 more elements
Dependencies are inferred from the claim text.