Patent ID: 11932913
Assignee: ELKEM ASA
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 14:
15. An inoculant for the manufacture of cast iron with spheroidal graphite, said inoculant comprises:
a particulate ferrosilicon alloy consisting of:
between 40 and 80% by weight of Si;
0.02-8% by weight of Ca;
0-5% by weight of Sr;
0-12% by weight of Ba;
0-15% by weight of rare earth metal;
0-5% by weight of Mg;
0.05-5% by weight of Al;
0-10% by weight of Mn;
0-10% by weight of Ti;
0-10 by weight of Zr;
the balance being Fe and unavoidable impurities,
wherein said inoculant additionally contains, by weight, based on the total weight of inoculant:
0.1 to 15% of particulate Bi2S3, and
optionally between 0.1 and 15% of particulate Bi2O3, and/or between 0.1 and 15% of particulate Sb2O3, and/or between 0.1 and 5% of one or more of particulate Fe3O4, Fe2O3, FeO, or a mixture thereof, and/or between 0.1 and 5% of one or more of particulate FeS, FeS2, Fe3S4, or a mixture thereof,
wherein the inoculant further comprises between 0.1 and 8% of particulate Sb2S3.