模拟流化床气基直接还原赤铁矿粉的试验研究  

Experimental Study on Simulating Fluidized Bed Gas-based Direct Reduction of Hematite Powder

作　　者：李玉祥[1] 孙毅[1] 杨康[1] 徐力[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院

出　　处：《金属矿山》2012年第1期77-79,135,共4页Metal Mine

基　　金：陕西省自然科学基础研究计划项目(编号:2011JQ7011);"濮耐"教育奖学金青年教师科研基金项目(编号:PN1105)

摘　　要：在竖直管式电阻炉中模拟流化床反应器,分别利用CO和H2作还原气体对恩施赤铁矿粉进行了直接还原试验研究。结果表明,缩小赤铁矿粉粒径、提高还原反应温度、增加还原反应时间、增加还原气体流量可以提高还原速率和单质Fe的含量;在其他反应条件相同的情况下,H2有着比CO强得多的还原赤铁矿粉的能力;在赤铁矿粉粒径为160～40μm、还原气体H2流量为0.36 m3/h、反应温度为950℃、反应时间为60 min条件下的还原产物,经磨矿、弱磁选,可以获得铁品位为74.92%、回收率为96.82%的铁精矿。The direct reduction experiments of hematite powder using CO and H2 as reducing gas respectively were conducted in a vertical tubular resistance furnace,which simulated a fluidized bed reactor.The results reveal that reducing the size of the hematite powders,increasing the reaction temperature,prolonging the reaction time and increasing the flow of reducing gas can enhance both the reduction rate of speed and the content of Fe.When the other reaction conditions are the same,the reducing power of H2 for the hematite powders is far stronger than CO.The reduction products,which were prepared under the following conditions：160~40 μm of the hematite powders size,using H2 as reducing gas with a flow of 0.36 m3/h at 950 ℃ for 60 min,were treated by grinding and low-intensity magnetic separation,and then a concentrate with an iron grade and recovery of 74.92% and 96.82%,respectively,can be obtained.

关 键 词：赤铁矿粉 流化床 直接还原 

分 类 号：O623.624[理学—有机化学]