Elektroschmelzwerk Kempten Gmbh

Gerhard Kahr

Theodor Benecke

Wolf-Dieter Schubert

Benno Lux

An Tuan Ta

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.

Growing community of inventors

Vienna, Austria

Gerhard Kahr