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Reference source from the internet.
1、炼钢生铁:作为平炉、转炉热装炼钢的原料。
  一般含Si0.6%-1.6%,S<0.07%。约占生铁产量的80-90%
2、铸造生铁:用于铸件生产。其特点是含Si较高,在1.25-4.25%之间
3、特殊生铁:如锰铁。硅铁。镜铁(含Mn10-25%)等为高炉冶炼的铁合金,用作炼钢脱氧剂。要求含P、S尽量低。它仅占铁产量的1-3%
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