Process for treating cast iron melts with silicon carbide

Details Process for treating cast iron melts with silicon carbide Process for treating cast iron melts with silicon carbide

1985-08-16

1987-02-10

Rosenberg, Peter D.

Alloys or metallic compositions

Ferrous

1.7 percent or more carbon containing

75 53, 75 58, C21C 702

Patent

active

046421351

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.

REFERENCES:
patent: 2569146 (1951-09-01), Balkcom
patent: 2771356 (1956-11-01), Carlson
patent: 3051564 (1962-08-01), Drenning
patent: 3158465 (1964-11-01), Brown

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