US Patent:
20190315659, Oct 17, 2019
Inventors:
- Chicago IL, US
Samar EMAMI - Chicago IL, US
Robert H. NEGRI - Lake Villa IL, US
Juan Carlos Ruiz Castaneda - Nuevo Leon, MX
Christopher R. NELSON - Lindenhurst IL, US
John J. ROXBURGH - Chicago IL, US
Edgar R. DE LA ROSA CRUZ - San Pedro Cholula, MX
Jorge A. GARCIA TORRES - San Pedro Cholula, MX
Miguel Gama Goicochea - Campestre Churubusco, MX
Antonio CONTRERAS - Aurora IL, US
Juan HUITZIL - San Miguelito, MX
International Classification:
C04B 28/14
C04B 24/38
C04B 24/04
C04B 24/26
C04B 24/12
C04B 22/06
C04B 22/16
C04B 22/14
C04B 18/02
C04B 38/02
C04B 40/00
Abstract:
Method of making foamed gypsum slurry having 15 to 90 volume percent gas bubbles including: passing first slurry including water and on dry basis 50 to 98 wt. % calcium sulfate hemihydrate, 1 to 50 wt. % calcium carbonate, and 0.1 to 10 wt. % cellulose thickener via a first hose to a Wye connector conduit first inlet opening at Rate C and passing alum solution via a second hose to a second inlet opening of the conduit at Rate D to create combined mixed stream passing from the conduit to a static mixer for mixing for Time 3 to activate at least a portion of the calcium carbonate and alum to generate COand create the foamed gypsum slurry; transferring the slurry from the mixer to a cavity between two wall boards via a third hose. Allowing the slurry in the cavity to expand, harden and dry.