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:
Feb. 10, 1987
Filed:
Aug. 16, 1985
Theodor Benecke, Munich, DE;
Benno Lux, Vienna, AT;
Wolf-Dieter Schubert, Vienna, AT;
An Tuan Ta, Vienna, AT;
Gerhard Kahr, Vienna, AT;
Elektroschmelzwerk Kempten GmbH, Munich, DE;
Abstract
The invention relates to a process for treating cast iron melts with silicon carbide. In this process, the silicon carbide used is subjected, before being introduced into the cast iron melt, to an oxidizing treatment in such a manner that the individual SiC granules are coated with a covering containing silica. A silicon carbide of this quality can be manufactured, for example, by subjecting the SiC in granular form, in a static or agitated mass, to an oxidizing atmosphere, such as air, oxygen or water vapor, at temperatures within the range of 900.degree.-1600.degree. C. and subsequently subjecting the agglomerates formed to gentle comminution to expose the SiC surfaces which, as a result of the formation of an agglomerate, completely or partially escaped the oxidizing attack.