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发明申请
US20050092130A1 Process and apparatus for the direct reduction of iron oxides in an electrothermal fluidized bed and resultant product 审中-公开
用于在电热流化床和所得产物中直接还原氧化铁的方法和装置

Process and apparatus for the direct reduction of iron oxides in an electrothermal fluidized bed and resultant product
摘要：
A method and an apparatus (50) for producing direct reduced iron (37) from dry pellets (25) composed of iron oxide and carbonaceous material. A mixture of pellets (25) and free coke particles (38) with weight relation from 3:1 to 5:1 is fed into the top of an electrothermal fluidized bed (32) that is fluidized by nitrogen. By exposing pellets (25) in the electrothermal fluidized bed (32) to temperatures of between approximately 850-1,100° C. for an average period of between approximately 15-60 minutes, the volatiles are removed and the pellets (25) metallized. Reduced pellets (37) mixed with free coke (38) are discharged from the bottom of fluidized bed (32) and cooled. The reduced iron pellets (37) are physically separated from any free coke (38) and the free coke (38) is recycled back into the fluidized bed (32).
摘要（中）：

一种用于由由氧化铁和碳质材料构成的干燥颗粒（25）制备直接还原铁（37）的方法和装置（50）。 将颗粒（25）和游离焦炭颗粒（38）的混合物加入到由氮气流化的电热流化床（32）的顶部，重量关系为3:1至5:1。 通过将电热流化床（32）中的颗粒（25）暴露于约850-1100℃之间的温度平均约15-60分钟之间，除去挥发物并将颗粒（25）金属化。 与游离焦炭（38）混合的还原颗粒（37）从流化床（32）的底部排出并冷却。 还原铁丸（37）与任何游离焦炭（38）物理分离，游离焦炭（38）再循环回流化床（32）。

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