球墨铸铁是实现“以铁代铜”、“以铸代锻”的原材料。过去,生产球墨铸铁,均是利用化铁炉(冲天炉、点头炉等)的铁水进行的。广东兴宁县龙北钢铁厂,在8米~3炉白煤炼铁的铁水在炉前直接处理成无镁稀土球墨铸铁,为土法上马,将高炉铁水直接球化开辟了先例。产品机械性能及化学成分 Ductile iron is to achieve the “iron on behalf of the copper”, “to cast forging” of raw materials. In the past, the production of ductile iron, are the use of iron furnace (cupola, nodding furnace, etc.) of the hot metal. Xingning County, Guangdong Longbei Iron and Steel Plant, 8 meters ~ 3 furnace white iron smelting of molten iron in the furnace directly into a magnesium-free rare earth ductile iron, for the local law launched the blast furnace hot metal directly opened a precedent. Product mechanical properties and chemical composition