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11. 发明授权

US5855643A Direct reduction process for iron oxide-containing materials 失效
标题翻译：含氧化铁材料的直接还原工艺
公开(公告)号：US5855643A
公开(公告)日：1999-01-05
申请号：US765339
申请日：1997-01-15
申请人： Gerhard Cip , Konstantin Milionis , Sadat Morteza Guscheh , Roy Hubert Whipp, Jr.
发明人： Gerhard Cip , Konstantin Milionis , Sadat Morteza Guscheh , Roy Hubert Whipp, Jr.
IPC分类号： C21B13/00
CPC分类号： C21B13/0073 , Y02P10/122 , Y02P10/136 , Y02P10/143
摘要： In a process for the direct reduction of iron-oxide containing material, synthesis gas is mixed with top gas formed in the direct reduction of the iron-oxide containing material and is used as a reducing gas for direct reduction. In order to avoid metal dusting despite an elevated CO-content of the reducing gas, or to reduce metal dusting, in a procedurally simple and cost-saving manner while minimizing the energy demand, an H.sub.2 O content of between 1 and 2%, preferably amounting to about 1.5%, is achieved in the reducing gas by subjecting a partial volume of the top gas to CO.sub.2 scrubbing prior to being used as a reducing gas, wherein the top gas subjected to CO.sub.2 scrubbing is mixed with the synthesis gas, is brought to a predetermined temperature by direct water irrigation while being saturated with H.sub.2 O, after direct water irrigation is heated to a temperature above the saturation temperature by admixing CO.sub.2 -unscrubbed top gas, and subsequently is used as a reducing gas.
摘要翻译： PCT No.PCT / AT95 / 00122 Sec。 371日期1997年1月15日 102（e）日期1997年1月15日PCT提交1995年6月20日PCT公布。公开号WO96 / 00303 日期1996年1月4日在直接还原含氧化铁材料的方法中，将合成气与直接还原含氧化铁材料形成的顶部气体混合，并用作直接还原的还原气体。为了避免金属粉尘，尽管还原气体的CO含量升高，或为了减少金属粉尘，在程序上简单且节省成本的同时尽量减少能量需求，H 2 O含量为1％至2％，优选为通过在用作还原气体之前对部分体积的顶部气体进行CO 2洗涤来实现还原气体，其中进行CO 2洗涤的顶部气体与合成气混合，被引入到通过直接水冲洗同时用H 2 O饱和的预定温度，在通过混合CO 2未沉积的顶部气体将直接水灌溉加热到高于饱和温度的温度之后，并且随后用作还原气体。

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