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:
Aug. 21, 2012
Filed:
Jun. 10, 2010
Applicants:
Sven-eric Lunner, Avesta, SE;
YE Guozhu, Luleå, SE;
Inventors:
Sven-Eric Lunner, Avesta, SE;
Ye Guozhu, Luleå, SE;
Assignee:
Outokumpu Oyj, Espoo, FI;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21C 7/076 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of producing a fluxing agent that can be used in production of steel, preferably stainless steel, employs as a raw material a hydroxide sludge that results from neutralization of metal-contaminated pickling liquid from a pickling step for a steel and contains at least one fluoride-containing compound. The hydroxide sludge is calcined. Steel, preferably stainless steel, is produced by decarburizing a steel heat, whereby a slag is formed on top of the steel heat, and adding a fluxing agent to the slag.