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：US20240376000A1

公开(公告)日：2024-11-14

申请号：US18688077

申请日：2022-08-31

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Karl-Heinz BOES ,  Beat STOFFEL ,  Michael WEIHRAUCH ,  Thomas STUTZ ,  Ernst BUCHER

IPC: C04B7/45 ,  C04B7/43

Abstract: A method of heating solids in a reactor to produce a heat-treated material, such as a cementitious, a supplementary cementitious, or a pozzolanic material, includes conveying the solids through the reactor from a feeding end to a discharge end so as to form a material bed extending from the feeding end to the discharge end; heating the solids during the conveying to at least 600° C. to transform the solids into the heat-treated material, wherein the heating includes applying radiative heating to the material bed from above and/or from the sides, wherein the radiative heating contributes at least 60% of the thermal energy needed for the heating, and wherein the material bed is mobilized during the conveying in order to renew the surface of the material bed that is exposed to the radiative heating.

公开(公告)号：US20240018039A1

公开(公告)日：2024-01-18

申请号：US18256349

申请日：2021-12-15

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Beat STOFFEL ,  Ernst BUCHER ,  Karl-Heinz BOES ,  Mirko WEBER

IPC: C04B7/46 ,  C04B7/43 ,  C04B7/47

CPC classification number: C04B7/46 ,  C04B7/432 ,  C04B7/475

Abstract: A method of calcining a raw material to obtain a cementitious material, includes providing a flow of raw material containing a metal carbonate, such as CaCO3 to a calcination system, introducing the flow of raw material into a first thermal reactor and at least partially decarbonating the raw material in the first thermal reactor by subjecting the raw material to a first heat treatment at a first temperature of at least 650° C. in order to obtain an at least partly decarbonated material and CO2, wherein the first thermal reactor is heated by electrical energy, and obtaining the cementitious material as a result of the first heat treatment.

公开(公告)号：US20240002288A1

公开(公告)日：2024-01-04

申请号：US18255311

申请日：2021-12-07

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Ernst BUCHER ,  Guillermo BRUSCO ,  Rudy BLUM ,  Beat STOFFEL ,  Michael WEIHRAUCH

IPC: C04B7/46 ,  C04B7/43 ,  C04B7/47 ,  F27B7/18 ,  F27B7/34 ,  F27D17/00 ,  F27D11/02

CPC classification number: C04B7/46 ,  C04B7/432 ,  C04B7/475 ,  F27B7/18 ,  F27B7/34 ,  F27D17/001 ,  F27D11/02 ,  F27D17/004

Abstract: A method of producing clinker from cement raw meal, includes preheating cement raw meal in a preheater string, the preheater string including a plurality of preheater stages, pre-calcining preheated raw meal in a pre-calciner to obtain a pre-calcined product, introducing the pre-calcined product into a rotary kiln for calcining the pre-calcined product to obtain cement clinker, wherein a partial flow of at least partly preheated raw meal is diverted from the preheater string, introduced into a calcination device and at least partially decarbonated in the calcination device in order to obtain an at least partially decarbonated product and CO2, wherein the calcination device is heated by electrical energy, and wherein the at least partially decarbonated product is fed into the rotary kiln and the CO2 is drawn off from the calcination device.

公开(公告)号：US20250026683A1

公开(公告)日：2025-01-23

申请号：US18713109

申请日：2022-11-30

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Ernst BUCHER ,  Dirk WIMMERT

IPC: C04B7/44 ,  C04B7/36 ,  C04B7/38 ,  C04B7/43 ,  C04B7/47 ,  F27B7/20 ,  F27B7/38 ,  F27D17/00

Abstract: A cement manufacturing plant includes a raw meal mill, at least one preheater string, a clinker furnace and a clinker cooler including a first section and a second section, wherein a preheater exhaust gas recirculation device is provided for recirculating exhaust gas leaving the at least one preheater string into the first section of the clinker cooler, and wherein the cement plant is configured for switching between an air operation mode and an oxyfuel operation mode, includes a first switching device for connecting either a source of air or a source of oxygen rich gas to a burning zone of the clinker furnace burner, and a second switching device for either establishing or separating a connection of the preheater exhaust gas recirculation means to the first section of the clinker cooler.

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.