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：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.