公开(公告)号：US20190315659A1

公开(公告)日：2019-10-17

申请号：US16292988

申请日：2019-03-05

申请人： UNITED STATES GYPSUM COMPANY

发明人： David D. PELOT ,  Samar EMAMI ,  Robert H. NEGRI ,  Juan Carlos Ruiz Castaneda ,  Christopher R. NELSON ,  John J. ROXBURGH ,  Edgar R. DE LA ROSA CRUZ ,  Jorge A. GARCIA TORRES ,  Miguel Gama Goicochea ,  Antonio CONTRERAS ,  Juan HUITZIL

IPC分类号： C04B28/14 ,  C04B24/38 ,  C04B24/04 ,  C04B24/26 ,  C04B24/12 ,  C04B22/06 ,  C04B22/16 ,  C04B22/14 ,  C04B18/02 ,  C04B38/02 ,  C04B40/00

摘要： 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 CO2 and 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.