EP 3 950 635 A1

Production method for cement clinker and cement clinker powder

(22) 13.03.2020

(43) 09.02.2022

(57) Portland cement clinker that includes C3A and C4AF in total from 22 to 40 mass % calculated by Bogue’s formulas and has an iron modulus (I.M.) of 0.8 to 1.3 is produced. The burned raw materials are annealed at a cooling rate of 20 °C or lower at least to 1200 °C so that the lightness of the cement clinker is made high. When annealing till lower temperatures, the lightness value becomes generally higher, but the effect becomes negligible lower at 1000 °C. Therefore, the raw materials are quenched at 1000 °C and lower for improving the productiveness.

(71) Tokuyama Corporation Shunan-shi, Yamaguchi 745-8648 (JP)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES Fl FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR; Designated Extension States: BA ME; Designated Validation States: KH MA MD TN

x

Related articles:

Issue 5/2022 US2022169566 (A1)

Production method for cement clinker and cement clinker powder

(22) 13.03.2020 (43) 02.06.2022 (57) Portland cement clinker that includes C3A and C4AF in total from 22 to 40 mass % calculated by Bogue’s formulas and has an iron modulus (I.M.) of 0.8 to 1.3 is...

more
Issue 8/2021 WO 2021/193368 A1

Cement clinker and cement composition

(22) 18.03.2021 (43) 30.09.2021 (57) Provided is cement clinker and a cement composition with which it is possible to improve the strength development of mortar while suppressing the increase in...

more
Issue 8/2023 WO 2023/182293 A1

Portland cement clinker, cement composition and method for producing Portland cement clinker

(22) 20.03.2023 (43) 28.09.2023 (57) Provided is a cement clinker that can be produced at a lower firing temperature with the use of a larger amount of waste matters, compared to conventional cement...

more
Issue 8/2021 WO 2021/193367 A1

Cement clinker, cement composition, and cement clinker production method

(22) 18.03.2021 (43) 30.09.2021 (57) Provided are a cement clinker and a cement composition which can be reduced in heat of hydration and are excellent in short term strength development. A cement...

more
Issue 1-2/2016 US 2015/0321956 A1

Method for controlling free lime content of clinker

(22) 08.03.2013 (43) 12.11.2015 (57) Provided is a method for controlling a free lime content of a clinker by regulating the free lime content. Here the amount of sulfur trioxide resulting from fuel...

more