The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2004
Filed:
Oct. 28, 2002
Applicant:
Inventor:
Alfred Edlinger, Bartholomäberg, AT;
Assignee:
Holcim Ltd., Jona, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 5/06 ; C21B 3/06 ; C21C 5/36 ; C22B 7/04 ;
U.S. Cl.
CPC ...
C04B 5/06 ; C21B 3/06 ; C21C 5/36 ; C22B 7/04 ;
Abstract
In a method for producing puzzolanic or hydraulic grinding additives for the cement industry from basic oxidic slags, in particular steel slags, using a metal bath for the reduction of metal oxides contained in the slags, the basicities of the liquid slags are adjusted to values lying 0.1 to 0.5 below the basicity value (CaO/SiO ) of the target slag prior to the reduction by adding acidic corrective substances such as, e.g., quartz sand and/or blast furnace slag and/or SiO -containing corrective substances.