US 12,036,561 B2
Method of producing a gypsum slurry for forming gypsum products and method of manufacturing a gypsum product
Martin Halbach, Niederwerrn (DE); and Tong Liu, Tianjin (CN)
Assigned to Knauf Gips KG, Iphofen (DE)
Appl. No. 16/619,219
Filed by Knauf Gips KG, Iphofen (DE)
PCT Filed Jun. 29, 2017, PCT No. PCT/EP2017/000772
§ 371(c)(1), (2) Date Dec. 4, 2019,
PCT Pub. No. WO2019/001677, PCT Pub. Date Jan. 3, 2019.
Prior Publication US 2020/0179939 A1, Jun. 11, 2020
Int. Cl. C04B 14/36 (2006.01); B02C 19/00 (2006.01); C04B 18/167 (2023.01); C04B 20/02 (2006.01); C04B 28/14 (2006.01); C04B 111/00 (2006.01)
CPC B02C 19/0056 (2013.01) [C04B 14/365 (2013.01); C04B 18/167 (2013.01); C04B 20/026 (2013.01); C04B 28/14 (2013.01); C04B 2111/0062 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of producing a gypsum slurry for forming gypsum products, comprising the steps of:
a) providing a gypsum paper product comprising a gypsum component and a paper component and/or broken parts thereof;
b) wet grinding the gypsum paper product and/or the broken parts thereof containing at least parts of the paper component to form a wet ground gypsum slurry; and
c) mixing the wet ground gypsum slurry with stucco,
wherein the wet ground gypsum slurry has a solid content between 2 wt % and 20 wt %, and
wherein a solid content of the gypsum slurry with respect to the stucco is between 0.5 wt % and 5 wt %.