The high magnesium spheroidizing agent is wrapped with steel strip and processed into linear shape for use. During spheroidizing, the cored wire is directly inserted into the raw molten iron with adjusted composition in the spheroidizing package by wire feeder for spheroidizing reaction, and the absorption rate of spheroidizing agent can reach more than 90%. It is used in the production of all nodular iron castings.

① The core material is all melted alloy, with few inclusions, dense texture and uniform composition.

② The reaction is stable and the absorption rate is stable, which can reduce the amount of alloy and save resources and costs.

③ Improve the spheroidization level, good flexibility and not easy to break.