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the technology of direct reduction with gas for the production of iron from iron ore

机译:用气体直接还原铁矿石生产铁的技术

摘要

The present invention permits operation at higher reducing temperatures with minimized problems of sinterization and agglomeration of iron ore particles. The process is carried out in a three- zone moving-bed reactor, reduction being effected in the upper zone by CO+H2. A stream of methane is circulated between the lower (cooling) zone, and a cooler, while additional methane (preferably amounting to 1-2% of the cooling stream) is added to that stream, whereby some methane passes upwardly from the cooling zone to the intermediate zone where it reacts endothermically with recycled gas from the reduction zone.
机译:本发明允许在较高的还原温度下操作,同时使铁矿石颗粒的烧结和结块问题最小化。该方法在三区移动床反应器中进行,还原反应在上方通过CO + H2进行。甲烷流在下部(冷却)区和冷却器之间循环,同时向该流中添加其他甲烷(最好是冷却流的1-2%),从而一些甲烷从冷却区向上流到中间区域,在该区域中它与来自还原区域的再循环气体发生吸热反应。

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