公开(公告)号：US20220315486A1

公开(公告)日：2022-10-06

申请号：US17608787

申请日：2020-04-09

Applicant: Tokuyama Corporation

Inventor： Akiyoshi MORI ,  Takashi CHABAYASHI ,  Takuya SEKI ,  Hiroyoshi KATO

IPC: C04B11/30 ,  C04B7/32 ,  C04B7/52 ,  C04B24/12

Abstract: A clinker that has a total content of C3A and C4AF of 22 to 40 mass %, calculated according to Bogue's formulas, and an iron modulus of 0.8 to 1.3 is pulverized with gypsum. Alternatively, the clinker after pulverization is mixed with gypsum powder. A pulverization agent comprising N-methyl-di-ethanol-amine and/or di-ethanol-isopropanol-amine is used in the pulverization.

公开(公告)号：US20220169566A1

公开(公告)日：2022-06-02

申请号：US17442658

申请日：2020-03-13

Applicant: Tokuyama Corporation

Inventor： Akiyoshi MORI ,  Takashi CHABAYASHI

IPC: C04B7/47

Abstract: 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 degree Celsius or lower at least to 1200 degree Celsius 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 degree Celsius. Therefore, the raw materials are quenched at 1000 degree Celsius and lower for improving the productiveness.