Gypsum product and method therefor
View Patent ↗A method for making a gypsum product water resistant, the method comprising adding a suspension of a hydrophobic substance to a gypsum slurry.
1. A method for making a gypsum product water resistant, the method comprising:
adding a wax suspension to a gypsum slurry.
2. The method according to claim 1 , wherein said wax suspension is added to said gypsum slurry on-line at a production line where a gypsum product is produced.
3. The method according to claim 1 , wherein said wax suspension is manufactured at a site where the gypsum product is produced.
4. The method according to claim 3 , wherein excess heat of producing the gypsum product is used as part of manufacturing said wax suspension.
5. The method according to claim 1 , further comprising storing wax in a first storage container, storing a liquid in a second storage container, and forming said wax suspension by dispersing said wax in said liquid in a mixing device.
6. The method according to claim 1 , wherein said wax suspension is added directly from said mixing device to said gypsum slurry.
7. The method according to claim 1 , wherein said wax suspension is fed from said mixing device to an auxiliary mixing device, and said wax suspension is added from said auxiliary mixing device to said gypsum slurry.
8. The method according to claim 6 , further comprising controlling flow of said wax suspension to said gypsum slurry with a control feeder valve.
9. The method according to claim 7 , further comprising controlling flow of said wax suspension to said gypsum slurry with a control feeder valve.
10. The method according to claim 8 , comprising producing and adding said wax suspension to said gypsum slurry in a production line, wherein said production line and said control feeder valve operate in a closed control loop.
11. The method according to claim 9 , comprising producing and adding said wax suspension to said gypsum slurry in a production line, wherein said production line and said control feeder valve operate in a closed control loop.
12. The method according to claim 1 , further comprising preparing the wax suspension at the gypsum production line.
13. The method according to claim 2 , further comprising preparing the wax suspension at the gypsum production line.
14. The method according to claim 6 , further comprising controlling production of said wax suspension to said gypsum slurry with a control feeder valve.
15. The method according to claim 7 , further comprising controlling production of said wax suspension to said gypsum slurry with a control feeder valve.