| 预氧化在攀枝花钛铁矿固态还原过程中的作用 |
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| 引用本文： | 郭宇峰,吕亚男,姜涛,邱冠周.预氧化在攀枝花钛铁矿固态还原过程中的作用[J].北京科技大学学报,2010,32(4). |
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| 作者姓名： | 郭宇峰 吕亚男 姜涛 邱冠周 |
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| 作者单位： | 中南大学资源加工与生物工程学院,长沙,410083 |
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| 基金项目： | 国家青年科学基金资助项目(No.50504018);;国家重点基础研究发展计划资助项目(No.2007CB613606) |
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| 摘 要： | 研究了预氧化对攀枝花钛铁矿还原行为的影响.结果表明:预氧化加快了钛铁矿铁氧化物的还原速率,提高了还原产物铁的金属化率.其作用机理是:钛铁矿在预氧化过程中形成了假金红石、三氧化二铁、金红石和三价铁板钛矿等新的物相,破坏了原有矿物结构,颗粒内部形成了大量孔隙,有利于增大颗粒的比表面积,改善还原过程气体的扩散条件;经预氧化处理的钛铁矿在预氧化过程中形成的新物相将被重新还原,新生钛铁矿活性高,还原产物的显微结构也得到了进一步的改善.
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| 关 键 词： | 钛铁矿 预氧化 固态还原 还原机理 |
Effect of pre-oxidation on Panzhihua ilmenite in solid state reduction process |
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| GUO Yu-feng,L Ya-nan,JIANG Tao,QIU Guan-zhou.Effect of pre-oxidation on Panzhihua ilmenite in solid state reduction process[J].Journal of University of Science and Technology Beijing,2010,32(4). |
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| Authors: | GUO Yu-feng L Ya-nan JIANG Tao QIU Guan-zhou |
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| Institution: | GUO Yu-feng,L(U) Ya-nan,JIANG Tao,QIU Guan-zhou |
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| Abstract: | The effect of pre-oxidation on the reduction behavior of Panzhihua ilmenite was studied.The results show that pre-oxidation can speed up the reduction rate of ilmenite iron oxide and improve the iron metallization rate of reduction products.The action mechanism is that new phases of shame rutile,ferric oxide,rutile,and trivalent pseudobrookite formed in the pre-oxidation process of ilmenite,which destroyed the structure of original minerals and formed plenty of pores in the granule interior.It would be bene... |
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| Keywords: | ilmenite pre-oxidation solid state reduction reduction mechanism |
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