| abstract |
The present invention relates to an inoculant for producing cast iron having plate-like, compressed and spherical graphite. The inoculum is 40-80 wt% silicon, 0.5-5 wt% calcium and / or strontium and / or barium, 0-10 wt% rare earth such as cerium and / or lanthanum, 0-5 wt% A particulate ferrosilicon alloy containing less than 5% magnesium, less than 5% aluminum, 0-10% manganese and / or zirconium, the balance iron, wherein the inoculum contains 0.1-10% particles by weight Bismuth oxide, optionally 0.1 to 10% by weight of one or more particulate metal sulfides and / or one or more iron oxides, wherein the particulate bismuth oxide is mixed with the ferrosilicon particles or It is blended or added to the liquid cast iron simultaneously with the particulate ferrosilicon particles. The invention further relates to a method for the production of an inoculum. [Selection] Figure 3a |