| abstract |
The present invention relates to an inoculum for the production of cast iron containing spheroidal graphite, a process for producing such an inoculum and a use of such an inoculant, wherein the inoculant comprises a particulate ferrosilicon alloy, wherein the inoculant comprises a particulate ferrosilicon alloy. The silicon alloy contains 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 of Ti; 0 to 10% by weight of Zr; Consisting of Fe as the balance and incidental impurities present in customary amounts, the inoculant comprises 0.1 to 15% by weight of particulate rare earth metal oxide(s), and 0.1 to 15% by weight, based on the total weight of the inoculant. % of particulate Bi 2 O 3 , and/or 0.1 to 15% of particulate Bi 2 S 3 , and/or 0.1 to 15% of particulate Sb 2 O 3 , and/or 0.1 to 15% of particulate Sb 2 S 3 , and/or 0.1 to 5% of one or more of particulate Fe 3 O 4 , Fe 2 O 3 , FeO, or mixtures thereof, and/or 0.1 to 5% of particulate FeS, FeS 2 , Fe 3 S 4 , or any of these It further contains at least one of one or more of the mixtures of |