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:
Mar. 29, 1977
Filed:
Nov. 14, 1974
Applicant:
Inventors:
Evan Thomas Jones, Birmingham, EN;
Robert Anthony Fishburn, Birmingham, EN;
Assignee:
Foseco International Limited, Birmingham, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ; C22B / ;
U.S. Cl.
CPC ...
75 51 ; 75 53 ; 75 57 ; 75 58 ; 75 94 ;
Abstract
The invention is concerned with the desulphurizing of molten steel by the use of a lime-based flux. In addition to lime the flux includes sodium carbonate, an alkali metal or alkaline earth metal fluoride, typically fluorspar, alumina and a metallic reducing agent. In particular, the reducing agent is aluminium or an alloy thereof and is present in an amount of 2 to 15% by weight. To desulphurize molten metal the flux is added to the molten metal in a vessel, typically by injecting the flux in particulate form into the molten metal.