METHOD FOR MODIFICATION OF CAST IRON WITH SPHERICAL GRAPHITE Russian patent published in 2013 - IPC C22C1/10 

FIELD: metallurgy.

SUBSTANCE: method involves charging onto cast iron melt mirror of cover material in the form of Barrier-200 flux-perlite powder and introduction to molten cast iron of solid modifying agent in the form of solid cerium-magnesium-nickel additive. Before solid modifying agent is introduced to the melt mirror, the first layer of cover material is added and kept till a dense viscous layer is formed; then, the second cover material layer is applied onto the first layer and solid modifying agent is introduced into the melt with further back filling of the introduction point with hot cover material. Solid modifying agent is kept in water before it is introduced to cast iron melt.

EFFECT: invention allows increasing efficiency of action of protective cover, which will allow increasing the weight of melt of modified cast iron, restricting the interaction of solid modifying agent with liquid cast iron in the air, and reducing magnesium and cerium loss.

5 cl, 1 tbl