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. 18, 2000
Filed:
Dec. 10, 1997
Applicant:
Inventors:
Heinz-Peter Kaiser, Neukirchen-Vluyn, DE;
Klaus-Jurgen Richter, Sonsbeck, DE;
Niclas Muller, Ratingen, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
75560 ; 75566 ; 75568 ; 420 22 ;
Abstract
Disclosed is a process for desulphurization of a pig iron melt for further processing wherein the melt is brought into close contact with a ground solid slag. As desulphurizing agent, the slag accumulating in secondary steelmaking with a basicity of at least 4, an iron content in the range of 4 to 6 wt.-% and a phosphorous content in the range .ltoreq.0.4 wt.-%, is used in ground form or the slag is used together with calcium carbide and magnesium as a solid mixture in ground form.