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117.56 kJ/mol，高于合成钛铁矿还原过程中的表观活化能。
The hydrogen reduction of Panzhihua ilmenite concentrate in the temperature range of 900?1050 °C was systematically investigated by thermogravimetric analysis (TG), X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. It was shown that the products of the Panzhihua ilmenite reduced at 900 °C were metallic iron and rutile. Above 1000 °C, ferrous pseudobrookite solid solution was generated. During the reduction process, element Mg gradually concentrated to form Mg-rich zone which can influence the metallization process. The reduction reaction proceeded topochemically and its related reduction kinetics were also discussed. The kinetics of the reduction indicated that the rate-controlling step was the diffusion process. The apparent activation energy of the hydrogen reduction of Panzhihua ilmenite was calculated to be 117.56 kJ/mol, which was larger than that of synthetic ilmenite under the same reduction condition.
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