Since pig iron and scrap are cheap, and because there is no expensive refinement process, cast iron is a low cost material compared with steel.

由于生铁和废钢铁都便宜，又因为不需要昂贵的精炼过程，和钢相比铸铁是一种廉价材料。

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These are graphite, high silicon cast iron, lead silver alloy, platinum, and even scrap steel rails.

所用材料有石墨、高硅铸铁、铅银合金、铂、甚至废钢轨等。

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This paper presents the process of getting the qualified molten iron through melting scrap, carburant and moderate cast pig iron, which offers a new way for producing ductile iron.

介绍了增碳剂在铁液中溶解的机理和目前主要采用的投入法和喷粉法增碳工艺。

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