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    • 5. 发明专利
    • Method for manufacturing direct-reduced iron
    • 制造直接还原铁的方法
    • JP2014084526A
    • 2014-05-12
    • JP2012237276
    • 2012-10-26
    • Kobe Steel Ltd株式会社神戸製鋼所
    • TSUSHIMA TAKUO SHORINYOSHIDA SHINGOTATEISHI MASATAKA
    • C21B13/00C21B13/10C21B13/12C22B1/16C22B1/244C22B5/10C22B7/02
    • C22B1/16C21B13/00C21B13/0046C21B13/006C21B13/008C22B1/14C22B1/245C22B5/10C22B7/02Y02P10/212
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing direct-reduced iron capable, on an occasion for manufacturing direct-reduced iron by heating an agglomerate, of improving the productivity of the direct-reduced iron by enhancing the yield of the direct-reduced iron.SOLUTION: The provided method for manufacturing direct-reduced iron includes a step of agglomerating a mixture including an iron oxide source, a carbonaceous reductant, and a melting point adjuster and a step of heating the obtained agglomerate and reducing the iron oxide within the agglomerate, whereas a mass including at least 1 mass% of silicate minerals having solidus temperatures of 1300°C or below is used as the agglomerate. It is desirable for the silicate minerals to include volatile contents, to be of the amphibole group, and to comprise at least one type selected from the group consisting of actinolite, cummingtonite, and grunerite. The silicate minerals can be used as the iron oxide source or melting point adjuster.
    • 要解决的问题:提供一种制造直接还原铁的方法,其能够通过加热附聚物来制造直接还原铁,通过提高直接还原铁的直接还原铁的产率来提高直接还原铁的生产率 所提供的直接还原铁的制造方法包括使包含氧化铁源,碳质还原剂和熔点调节剂的混合物凝聚的步骤,以及将获得的附聚物加热并还原氧化铁的步骤 凝聚物,而使用包含至少1质量%的固相线温度为1300℃以下的硅酸盐矿物的质量作为附聚物。 硅酸盐矿物质优选包括挥发性成分,并且包含至少一种选自由以下组成的组中的至少一种:放射钙质,钙矾石和苦杏仁。 硅酸盐矿物可用作氧化铁源或熔点调节剂。