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    • 2. 发明申请
    • METHOD AND SYSTEM FOR PRODUCING METALLIC IRON NUGGETS
    • 生产金属铁块的方法和系统
    • WO2009105320A3
    • 2009-10-22
    • PCT/US2009032519
    • 2009-01-30
    • NU IRON TECHNOLOGY LLCIWASAKI IWAOENGLUND DAVID JKIESEL RICHARD F
    • IWASAKI IWAOENGLUND DAVID JKIESEL RICHARD F
    • C21B11/08C21B13/10
    • C21B13/105C21B13/0046C21B2300/04C22B1/245C22B5/10
    • A method and system for producing metallic iron nuggets may include providing multiple layers of agglomerates, such as briquettes, balls and extrusions, of a reducible mixture of reducing material (such as carbonaceous material) and of a reducible iron bearing material (such as iron oxide) on a hearth material layer (such as carbonaceous material) and providing a coarse overlayer of carbonaceous material over at least some of the agglomerates. Heating the agglomerates of reducible mixture to 1425 °C or 1400 °C or 1375 °C results in formation of an intermediate product of one or more metallic iron nuggets, which may have a sulfur content of less than 0.03%, and slag, which may have less than 5% mass MgO, which may have a ratio of percent by weight sulfur in the slag over percent by weight sulfur in the metallic nuggets of at least about 12 or at least about 15.
    • 用于生产金属铁块的方法和系统可以包括提供还原材料(例如含碳材料)和可还原含铁材料(诸如氧化铁)的可还原混合物的多层附聚物(例如团块,球和挤出物) )置于炉底材料层(例如含碳材料)上并在至少一些附聚物上提供碳质材料的粗糙覆盖层。 将可还原混合物的附聚物加热至1425℃或1400℃或1375℃导致形成一种或多种可能具有小于0.03%的硫含量的金属铁矿块和炉渣的中间产物, 具有小于5%的MgO质量,其可以具有至少约12或至少约15的炉渣中的硫重量百分比与金属块中的硫重量百分比的比率。