A method for the preparation of a cast iron melted mass

摘要

NODULARIZING CATALYST FOR CAST IRONAND METHOD OF MAKING SAMEABSTRACT OF THE DISCLOSUREAn improved catalyst is disclosed for makingspheroidal graphitic cast iron, the catalyst being in theform of a solid impervious and brittle block but severedfrom a sheet stock having a predetermined grid pattern ofperforations or notches along at least one surface of saidsheet stock. The block is substantially devoid ofsegregation and oxide interiorally thereof; the thicknessof said block is increased over that capable of beingproduced by the prior art in the as-cast condition and yetdevoid of segregation. The method of making such blockcomprises casting the molten catalyst into shallow closedpans, the cover for said pans carrying a pattern of ribs orprojections, the cover and pan cooperating to define a selectedconfiguration for an as-cast sheet stock. The resultingcast product can be manually or automatically broken alongany desired module, defined by said grid pattern, tosuit a variety of in plant casting applications particularlyutilizing in-the-mold nodularizing treatment. The lattermethod places a nodularizing catalyst in a recess orreaction chamber defined within the gating system of amold, whether constructed of bonded sand or pre-castrefractory.