Those can be easily welded back together if you have all the pieces, or not.
I use Crown Alloys Company, Royal 44-30 wire in a MIG all the time to repair cast iron parts. The best wire on the market for cast iron repairs.
https://crownalloys.com/wp-content/...rning-White-PWP-added-to-website-11-23-15.pdf
Also there is no need to pre-heat, or post-heat the metal. It just plain works.
Tom