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    • 10. 发明申请
    • METHOD FOR PRODUCING GRANULAR METALLIC IRON
    • 生产颗粒金属铁的方法
    • US20110023656A1
    • 2011-02-03
    • US12937054
    • 2009-04-06
    • Kazutaka KuniiTakahiro Kudo
    • Kazutaka KuniiTakahiro Kudo
    • B22F9/20
    • C21B13/008C21B13/0046C21B13/006C21B13/105C21C5/54C21C7/076Y02P10/136Y02P10/216Y02P10/242
    • A method for producing granular metallic iron by heating and reducing a raw material mixture which includes an iron oxide-containing material, a carbonaceous reductant and a Li2O supplying material in a thermal reduction furnace, wherein the iron oxide-containing material includes a hematite-containing material, and the raw material mixture includes at least Fe, Ca, Mg, Si and Li as constituent elements in such a manner that slag which forms as a by-product during heating and reduction contains CaO, MgO, SiO2 and Li2O, has a Li2O content of 0.05% by mass or more, and the slag has a basicity [(CaO+MgO)/SiO2] in a range of from 1.5 to 1.9. This method enables granular metallic iron to be produced at a high productivity even when a hematite-containing material is used as the iron oxide-containing material.
    • 一种通过在热还原炉中加热还原包含含氧化铁的材料,碳质还原剂和Li2O供应材料的原料混合物来生产颗粒状金属铁的方法,其中含氧化铁的材料包括含赤铁矿的材料 原料混合物至少包含Fe,Ca,Mg,Si和Li作为构成元素,使得在加热和还原期间作为副产物形成的炉渣含有CaO,MgO,SiO 2和Li 2 O,具有 Li2O含量为0.05质量%以上,炉渣的碱度[(CaO + MgO)/ SiO2]为1.5〜1.9。 这种方法使得即使使用含赤铁矿的材料作为含铁氧化物的材料也能以高生产率生产粒状金属铁。