公开(公告)号：WO2023044403A1

公开(公告)日：2023-03-23

申请号：PCT/US2022/076523

申请日：2022-09-16

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： WALKER, Blair

IPC: C04B11/028

Abstract: Embodiments of a system and a method for manufacturing calcined gypsum can include an in-line calcination control device having an x-ray analyzer. The x-ray analyzer is adapted to analyze at least one of the calcined gypsum being discharged from the calciner and the calcined gypsum being fed into a mixer of a gypsum boardline. The x-ray analyzer is configured to determine the proportion of different calcium sulphate phases found therein which can be used to control at last one of the calciner and the boardline.

公开(公告)号：WO2019094875A1

公开(公告)日：2019-05-16

申请号：PCT/US2018/060588

申请日：2018-11-13

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： WALKER, Blair ,  STEWART, Erin

IPC: B07B1/24 ,  B07B1/55 ,  B03B9/06

CPC classification number: B28B3/206 ,  B07B1/24 ,  B07B1/55 ,  B28B3/222

Abstract: A screen assembly (10) includes a housing (32) having an inlet end (36) and an outlet end (40), and a stucco discharge opening (24) being located between the inlet end and the outlet end. An auger shaft (54) is located in the housing for axial rotation and having at least one first helical flight (72) arranged in a flight pattern oriented so that material engaging the first helical flight is conveyed from the inlet end to the outlet end. A screen (76) surrounds the at least one first helical flight for common rotation and extends generally from the inlet end to the outlet end. At least one second helical flight (80) is disposed on an exterior surface (82) of the screen and is arranged in a flight pattern oriented so that material engaging the second helical flight is conveyed in a direction from the outlet end.