公开(公告)号：US4556417A

公开(公告)日：1985-12-03

申请号：US495422

申请日：1983-05-17

申请人： Enrique R. Martinez-Vera ,  Alberto Bustani-Adem

发明人： Enrique R. Martinez-Vera ,  Alberto Bustani-Adem

IPC分类号： C21B13/02

CPC分类号： C21B13/02 ,  C21B2100/02 ,  C21B2100/04 ,  Y02P10/122 ,  Y02P10/136 ,  Y02P10/143

摘要： The present invention relates to a process for the production of metallic iron through direct reduction of iron ores and particularly to an optimized process which permits operation at higher reducing temperatures with minimized problems of sinterization and agglomeration of iron ore particles. It is also an object of the present invention to provide a process wherein the required size of the reducing gas generating unit is reduced. Both objects are preferably achieved by means of injecting only natural gas, or a similar methane-containing gas into the cooling loop of the direct reduction process and venting a portion of the cooling gas from the cooling zone to the reducing zone (preferably, on the order of 1% to 2% of the methane content of the cooling gas in relation to the volume flow of the reducing gas).

摘要翻译： 本发明涉及通过直接还原铁矿石生产金属铁的方法，特别涉及一种优化方法，该方法允许在更高的还原温度下操作，而铁矿石颗粒的烧结和附聚最小化的问题。 本发明的另一个目的是提供一种其中还原气体发生单元所需尺寸减小的方法。 两个目的优选通过仅将天然气或类似的含甲烷气体注入到直接还原过程的冷却回路中并将冷却气体的一部分从冷却区域排出到还原区（优选地，在 相对于还原气体的体积流量，冷却气体的甲烷含量的1〜2％的量级）。