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2. 发明公开

EP0128347A2 Method for reducing iron ore 失效
标题翻译： Verfahren zur Direktreduktion von Eisenerzen。
公开(公告)号：EP0128347A2
公开(公告)日：1984-12-19
申请号：EP84105128.7
申请日：1984-05-07
申请人： HYLSA, S.A. de C.V.
发明人： Martinez-Vera, Enrique Ramon , Becerra-Novoa, Jorge Octavio
IPC分类号： C21B13/02
CPC分类号： C21B13/02 , C21B2100/22 , C21B2100/282 , Y02P10/122 , Y02P10/126 , Y02P10/136 , Y02P10/143
摘要： A method for the gaseous reduction of iron ore to sponge iron in a vertical shaft moving bed reactor (10) wherein a hot gaseous mixture of hydrogen and a carbon monoxide is used to reduce the ore. It has been found unnecessary to use the external catalytic reformer of prior art processes to reform the methane and other hydrocarbon constituents of the natural gas commonly used as a source of gaseous reductants. By establishing a reducing gas recycle loop to which make-up natural gas and steam are fed in the proper proportions, the product sponge iron in the reactor (10) can be used to catalyze hydrocarbon reformation, provided that the carbon content of the recycled gas is maintained low by removing carbon dioxide therefrom. When pure methane is employed, steam/methane molar ratios within the preferred range of 1,4: 1 to 2.2: 1 are used.
摘要翻译：在垂直轴移动床反应器（10）中将铁矿石气态还原成海绵铁的方法，其中使用氢气和一氧化碳的热气体混合物来还原矿石。已经发现不需要使用现有技术方法的外部催化重整器来改造通常用作气态还原剂源的天然气的甲烷和其它烃组分。通过建立一种还原气体循环回路，补充天然气和蒸汽以适当的比例进料，反应器（10）中的产品海绵铁可用于催化烃改性，条件是循环气体的碳含量通过从其中除去二氧化碳来保持低温。当使用纯甲烷时，使用在优选范围为1,4：1至2.2：1的蒸汽/甲烷摩尔比。

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