Title:
PORTLAND CEMENT CLINKER AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/095515
Kind Code:
A1
Abstract:
The present invention discloses a Portland cement clinker and a preparation method therefor. M1 type alite accounts for 99% or more of the mass of all alite crystal forms; and the clinker contains a trace amount of magnesium and a trace amount of sulfur, wherein the mass percentage of magnesium is 0.5%-5% in terms of MgO, and the mass percentage content of sulfur is 0.36%-2.94% in terms of SO3. In the present invention, from the perspective of ion regulation and control, magnesium and sulfur elements are simultaneously introduced in a preparation process of a Portland cement raw material, and M3 type alite in the clinker is completely converted into the M1 type alite under the combined action of the magnesium and sulfur elements, such that the Portland cement clinker having a higher M1 type alite content is stably sintered; and a clinker sintering temperature is decreased, fossil fuel consumption is reduced, greenhouse gas emission is reduced, the multiple effects of energy conservation, emission reduction, consumption reduction, and quality improvement are achieved, and application value is extremely high.
Inventors:
ZHOU HAO (CN)
LI XIAODONG (CN)
SHI CHAOQI (CN)
SHEN XIAODONG (CN)
WANG QIANQIAN (CN)
YU ZHUQING (CN)
LI XIAODONG (CN)
SHI CHAOQI (CN)
SHEN XIAODONG (CN)
WANG QIANQIAN (CN)
YU ZHUQING (CN)
Application Number:
PCT/CN2021/109189
Publication Date:
May 12, 2022
Filing Date:
July 29, 2021
Export Citation:
Assignee:
NANJING UNIVERSITY OF TECHNOLOGY (CN)
JIANGSU RUIYING ADVANCED MATERIALS TECH DEVELOPMENT CO LTD (CN)
JIANGSU RUIYING ADVANCED MATERIALS TECH DEVELOPMENT CO LTD (CN)
International Classes:
C04B7/02; C04B7/44
Foreign References:
| CN112341010A | 2021-02-09 | |||
| CN112299734A | 2021-02-02 |
Other References:
HE YUNXUAN: "Effect of MgO on Formation and Hydration of Alite in High Magnesium Recycled Cement Clinker", MASTER THESIS, TIANJIN POLYTECHNIC UNIVERSITY, CN, no. 2, 15 February 2020 (2020-02-15), CN , XP055927467, ISSN: 1674-0246
SEGATA, M. ET AL.: "The effects of MgO, Na O and SO on industrial clinkering process: phase composition, polymorphism, microstructure and hydration, using a multidisciplinary approach", MATERIALS CHARACTERIZATION, vol. 155, 2019, pages 109809 - 109822, XP085796110, DOI: 10.1016/j.matchar.2019.109809
J.Y YE: "FTIR study on the polymorphic structure of tricalcium silicate", CEMENT AND CONCRETE RESEARCH, vol. 99, 2017, pages 129 - 136, XP085050545, DOI: 10.1016/j.cemconres.2016.11.021
See also references of EP 4183756A4
SEGATA, M. ET AL.: "The effects of MgO, Na O and SO on industrial clinkering process: phase composition, polymorphism, microstructure and hydration, using a multidisciplinary approach", MATERIALS CHARACTERIZATION, vol. 155, 2019, pages 109809 - 109822, XP085796110, DOI: 10.1016/j.matchar.2019.109809
J.Y YE: "FTIR study on the polymorphic structure of tricalcium silicate", CEMENT AND CONCRETE RESEARCH, vol. 99, 2017, pages 129 - 136, XP085050545, DOI: 10.1016/j.cemconres.2016.11.021
See also references of EP 4183756A4
Attorney, Agent or Firm:
JIANGSU SUNDY LAW FIRM (CN)
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