http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-483963-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2c55af2efb880df0108ef16e6db6e72b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C3-102 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B11-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-102 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B11-00 |
| filingDate | 1979-09-05^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1980-09-01^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-483963-A1 |
| titleOfInvention | A PERFECTED PROCEDURE FOR MANUFACTURING YE-SO BOARDS |
| abstract | An improved process for making gypsum board, characterized by the use of a reduced amount of water to fluidize calcined gypsum in the formation of a gypsum slurry that is fed to a board-making machine while maintaining creep strength. compressing the dried gypsum board, comprising (1) supplying the calcined gypsum feed to be conveyed to a gypsum slurry mixer; (2) conveying the calcined gypsum feed to a mixer; (3) mixing a small amount of water with said calcined gypsum, said amount of water being between about 1% and about 10% by weight of the calcined gypsum feed; (4) allow the water-treated plaster of paris to cure; (5) milling the cured calcined gypsum to increase the surface area of the cured gypsum particles whereby the surface is reactivated to improve the degree of strength development and tear strength of the gypsum board product; (6) feeding the cured and ground calcined gypsum to a gypsum suspension mixer; (7) adding additional water to the cured and ground calcined gypsum in the slurry mixer, said additional water being added in an amount sufficient to provide from about 50 to about 85 parts of water, including the water added in the mixer cited in (2 ), per 100 parts of the calcined gypsum, which results in a substantially reduced amount of water evaporating from the wet board; (8) mixing the ground cured calcined gypsum and water in the slurry mixer to form a homogeneous slurry; (9) feeding the slurry to a gypsum board manufacturing machine to form wet gypsum board; (10) passing the wet gypsum board into a kiln to remove the board; and (11) recovering dry gypsum board consisting essentially of calcium sulfate dihydrate. |
| priorityDate | 1978-09-05^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419512635 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 |
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