Reductive kinetics of Panzhihua ilmenite with hydrogen  

攀枝花钛铁矿的氢气还原动力学（英文）

作　　者：Chang-yuan LU Xing-li ZOU Xiong-gang LU Xue-liang XIE Kai ZHENG Wei XIAO Hong-wei CHENG Guang-shi LI 路长远;邹星礼;鲁雄刚;谢学良;郑凯;肖玮;程红伟;李光石(上海大学材料科学与工程学院,上海200072;上海大学省部共建高品质特殊钢冶金与制备国家重点实验室,上海200072;上海大学上海市钢铁冶金新技术开发应用重点实验室,上海200072;上海杉杉科技有限公司,上海201209)

机构地区：[1]School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China [2]State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China [3]Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai 200072, China [4]Shanghai Shanshan Tech. Co., Ltd., Shanghai 201209, China

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第12期3266-3273,共8页中国有色金属学报（英文版）

基　　金：Project(2014CB643403)supported by the National Basic Research Program of China;Projects(51225401,51304132,51574164)supported by the National Natural Science Foundation of China;Project(14JC1491400)supported by the Science and Technology Commissions of Shanghai Municipality,China;Project(2013GZ0146)supported by the Sichuan Province,China

摘　　要：The hydrogen reduction of Panzhihua ilmenite concentrate in the temperature range of 900?1050 °C was systematicallyinvestigated by thermogravimetric analysis (TG), X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. It wasshown that the products of the Panzhihua ilmenite reduced at 900 °C were metallic iron and rutile. Above 1000 °C, ferrouspseudobrookite solid solution was generated. During the reduction process, element Mg gradually concentrated to form Mg-rich zonewhich can influence the metallization process. The reduction reaction proceeded topochemically and its related reduction kineticswere also discussed. The kinetics of the reduction indicated that the rate-controlling step was the diffusion process. The apparentactivation energy of the hydrogen reduction of Panzhihua ilmenite was calculated to be 117.56 kJ/mol, which was larger than that ofsynthetic ilmenite under the same reduction condition.采用TG、XRD和SEM等分析手段，系统研究了900~1050°C条件下攀枝花钛铁矿的氢气还原过程。结果表明：在900°C恒温还原过程中，还原产物为铁和金红石，当温度高于1000°C时，亚铁板钛矿开始形成。在还原过程中，元素镁会逐渐富集并影响金属化过程。同时，讨论了局部化学反应和相关的还原动力学过程，反应控速步骤为扩散过程。由计算可知，在所选实验条件下，氢气还原攀枝花钛铁矿的表观活化能为117.56kJ/mol，高于合成钛铁矿还原过程中的表观活化能。

关 键 词：Panzhihua ilmenite synthetic ilmenite hydrogen reduction KINETICS rate-controlling step magnesium migration 

分 类 号：TF511[冶金工程—钢铁冶金]