| abstract |
The present invention relates to an inoculum for the production of cast iron with spheroidal graphite, a method for producing such an inoculum and the use of such an inoculant, said inoculant comprising a particulate ferrosilicon alloy, said particulate ferrosilicon The alloy comprises 40 to 80 weight percent Si; 0.02 to 8% by weight of Ca; 0 to 5% by weight of Sr; 0 to 12% by weight of Ba; 0 to 15% by weight of a rare earth metal; 0 to 5% by weight of Mg; 0.05 to 5% by weight of Al; 0 to 10% by weight of Mn; 0 to 10% by weight Ti; 0 to 10% by weight of Zr; Consisting of Fe as balance and incidental impurities present in customary amounts, said inoculum being 0.1 to 15% by weight of particulate Bi 2 S 2 , based on the total weight of the inoculant. and optionally 0.1 to 15% particulate Bi 2 O 3 . and/or 0.1-15% particulate Sb 2 O 3 , and/or 0.1-15% particulate Sb 2 S 3 . and/or 0.1 to 5% of particulate Fe 3 O 4 , Fe 2 O 2 , FeO, or mixtures thereof, and/or 0.1 to 5% of particulate FeS, FeS 2 , Fe 2 S 2 , or mixtures thereof It further contains one or more. |