Influence of H2 on Reduction of Iron Oxide in Carbon Composite Pellets
We studied the influence of H2 addition to atmosphere on reduction of iron oxide pellets containing cokes.Cokes were mixed with reagent grade hematite in the mass ratio of one to four (COKE-a) or nine (COKE-b) together with bentonite of 1 mass% as a binder.Carbon composite pellets using cokes were prepared by handrolling.The formed pellets were reduced from a room temperature to 1273 K at 10 K min-1 in the inert gas (Ar or N2) atmosphere or the inert gas atmosphere containing 10 vol% H2.From variations of gas flow rate and weight loss curve of COKE-a in the inert gas atmosphere containing 10 vol% H2,it was found that the reduction of iron oxide started from 573 K by the effect of 10 vol% H2 and accelerated from 1273 K by the effect of cokes.On the other hand,in case of COKE-b,the weight drastically decreased from 1273 K by the effect of 10 vol% H2.Finally,the UH2(H2 reaction ratio) increased with decreasing the RC(coke reaction ratio) using COKE-b.
hydrogen carbon composite pellets reduction of iron oxide
KONISHI Hirokazu ICHIKAWA Kazuhira USUI Tateo ONO Hideki TAKEUCHI Eiichi
Graduate School of Engineering,Osaka University,2-1Yamadaoka,Suita,Osaka,JAPAN 565-0871 Graduate Student,Graduate School of Engineering,Osaka University,now JFE Steel Corporation Emeritus Professor,Graduate School of Engineering,Osaka University,now Guest Professor,Osaka Univers
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-4
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）