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:
Jul. 21, 2009
Filed:
Dec. 23, 2004
Applicants:
François Sorrentino, Meyzieu, FR;
Michel Gimenez, Diemoz, FR;
Inventors:
François Sorrentino, Meyzieu, FR;
Michel Gimenez, Diemoz, FR;
Assignee:
Lafarge, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21B 3/02 (2006.01); C21B 5/02 (2006.01); C21B 7/06 (2006.01); C21C 5/02 (2006.01); C21C 7/04 (2006.01); C22B 7/04 (2006.01); C22B 9/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A low cost steel desulphurating agent includes, compared with the total weight of the agent, at least 10% of SiO, at least 10% of C2S, and at least 35% of at least one of calcium aluminate or calcium silico-aluminate. The desulphurating agent can include, compared with the total weight of the agent, the following mineralogical phases: 10 to 60% of C2S, 0 to 50% of C3A, 0 to 50% of C2AS, 0to 70% of C12A7, and 0 to 60% of CA.