Composite mineralizers/fluxes for the production of alite/calcium sulfoaluminate clinkers

Patent metadata

Field	Value
Publication number	US-2024409464-A1
Application number	US-202318208222-A
Country	US
Kind code	A1
Filing date	Jun 9, 2023
Priority date	Jan 30, 2020
Publication date	Dec 12, 2024
Grant date	—

Abstract

A cement clinker composition incorporates calcium fluoride and iron oxide to reduce firing temperatures and increase strength. High fly ash, aluminum dross, aluminum scrap, high aluminum clays and combinations thereof may also be substituted for bauxite in the cement clinker composition

First claim

1 - 6 . (canceled)

7 . A cement clinker composition, comprising;
15-40 wt % C 3 S; 20-60 wt % C 4 A 3 Ś; 5-30 wt % C 2 S; 1-10 wt % C 4 AF; and 0.4-1.0 wt % CaF 2 as present in fluorellestadite and fluormayenite clinker phases fired at 1150-1350° C.

8 . The cement clinker of claim 7 , further including between about 0.5-2.0 wt % Fe 2 O 3 .

9 . The cement clinker of claim 8 , further including between about 10-35 wt % of a bauxite substitute selected from a group consisting of high fly ash alumina, aluminum dross, aluminum scrap, high alumina clays and combinations thereof.

10 . The cement clinker of claim 7 , further including between about 10-35 wt % of a bauxite substitute selected from a group consisting of high fly ash alumina, aluminum dross, aluminum scrap, high alumina clays and combinations thereof.

11 . The cement clinker composition of claim 7 , including:
20-35 wt % C 3 S; 40-55 wt % C 4 A 3 Ś; 10-25 wt % C 2 S; 1-4 wt % C 4 AF; and 0.6-0.8 wt % CaF 2 as present in fluorellestadite and fluormayenite clinker phases fired at 1200-1300° C.

12 - 13 . (canceled)

14 . The cement clinker of claim 11 , further including between about 10-35 wt % of a bauxite substitute selected from a group consisting of high fly ash alumina, aluminum dross, aluminum scrap, high alumina clays and combinations thereof.

15 . A cement clinker composition, comprising between about 0.1 and about 3.0 wt % fluoride compound and between about 0.5 and about 5.0 wt % Fe 2 O 3 and after firing at between about 1150° C. and 1350° C. including between about 15 and about 40 wt % alite and between about 20 and about 60 wt % calcium sulfoaluminate.

16 . The cement clinker of claim 15 , further including between about 10-35 wt % of a bauxite substitute selected from a group consisting of high fly ash alumina, aluminum dross, aluminum scrap, high alumina clays, kaolin, metakaolin, 1:1 silica to alumina clays and combinations thereof.

17 . The cement clinker of claim 15 , after firing at between 1200° C. and 1300° C.

Assignees

• Univ Kentucky Res Found

Inventors

• Duvallet Tristana
• Robl Thomas
• Jewell Robert

Classifications

• C04B28/065 Primary

  Calcium aluminosulfate cements, e.g. cements hydrating into ettringite · CPC title

• C04B7/44

  Burning; Melting · CPC title

• C04B7/425

  Acids or salts thereof · CPC title

• C04B7/424

  Oxides, Hydroxides · CPC title

• Y02P40/10

  Production of cement, e.g. improving or optimising the production methods; Cement grinding · CPC title