公开(公告)号：US20230002277A1

公开(公告)日：2023-01-05

申请号：US17781634

申请日：2020-12-18

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Michael WEIHRAUCH ,  Ernst BUCHER ,  Andreas SPULER ,  Peter KRUSPAN ,  Rudy BLUM

IPC: C04B7/47 ,  C04B7/43 ,  C04B7/44 ,  C04B7/52 ,  F27B7/20 ,  F27D17/00

Abstract: A method of producing cement clinker and a second calcined material, wherein the cement clinker is produced in a first production line and the second calcined material is produced from a raw material in a second production line by carrying out the following procedures e) optionally drying the raw material in a dryer, g) calcining the optionally dried raw material in a rotary kiln to obtain the second calcined material, wherein the sensible heat of a hot gas in the first production line is used as a heat source in the calcining step g) for calcining the raw material, and wherein the rotary kiln exhaust gas coming from the calcining step g) is introduced into the first production line for the secondary combustion of the rotary kiln exhaust gas.

公开(公告)号：US20230406774A1

公开(公告)日：2023-12-21

申请号：US18247702

申请日：2021-09-30

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Peter KRUSPAN ,  Ernst BUCHER ,  Peter LUNK ,  Michael WEIHRAUCH

IPC: C04B28/14 ,  C04B14/04 ,  C04B14/26 ,  C04B18/04 ,  C04B14/10 ,  C04B11/024 ,  C04B28/18 ,  C04B28/04 ,  C04B11/00 ,  C04B11/30

CPC classification number: C04B28/14 ,  C04B14/043 ,  C04B14/26 ,  C04B18/04 ,  C04B14/10 ,  C04B11/024 ,  C04B28/186 ,  C04B28/04 ,  C04B11/005 ,  C04B11/30

Abstract: A method of producing a supplementary cementitious material, includes providing at least one waste material selected from quarry sludge, aggregate washing sludge and road cleaning sludge, removing excess water from said waste material so as to provide a dry waste material, and either: mixing the dry waste material with a source of calcium sulphate to obtain a raw material mixture, and calcining the raw material mixture at a temperature of 700-900° C. to obtain the supplementary cementitious material, or: calcining the dry waste material at a temperature of 700-900° C. to obtain a calcined waste material, and mixing the calcined waste material with a calcined source of calcium sulphate to obtain the supplementary cementitious material.

公开(公告)号：US20210002172A1

公开(公告)日：2021-01-07

申请号：US16965869

申请日：2019-01-29

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Peter KRUSPAN ,  Konrad STEMMLER ,  Ludger DAGGE ,  Melanie LANGANKE

IPC: C04B11/00 ,  C04B11/26 ,  C04B28/14 ,  B09B3/00

Abstract: A method of processing plasterboards or plasterboard for recover a calcium sulphate source for producing a hydraulic binder, includes comminuting plasterboards or a gypsum fraction thereof so as to obtain plasterboard particles and, thereafter, subjecting the plasterboard particles to a heat treatment at an elevated temperature so as to volatilize and/or decompose organic components present in the plasterboard particles.