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| Effect of MgO on Micro-behavior for Precipitation of Metallic Iron in Fe2O3 Reduction under CO Atmosphere |
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Received:January 18, 2012
Revised:January 18, 2012
Accepted:January 19, 2012
Published Online:April 23, 2012
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| DOI：doi：10.3969/j.issn.1007-7545.2012.05.014 |
| KeyWord:stereo optical microscope; hot-stage; in situ observation; CO reduction; iron whisker; MgO |
| Author | Institution |
| ZHAO Zhi-long |
北京科技大学钢铁冶金新技术国家重点实验室 |
| TANG Hui-qing |
北京科技大学钢铁冶金新技术国家重点实验室 |
| GUO Zhan-cheng |
北京科技大学钢铁冶金新技术国家重点实验室 |
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| Abstract: |
| The effects of MgO on the nucleation and growth of iron whiskers and their mechanism in Fe2O3 reduction with CO were study with stereo optical microscope and hot stage. The effecting mechanism of MgO on the precipitation morphology of metallic iron at the gas-solid interfaces during reduction was revealed from micro aspect with SEM, EDS TG and FT-IR. The results indicate that doped MgO can effectively change the precipitation morphology of metallic iron after the reduction of Fe2O3, and inhibit the nucleation and growth of iron whiskers. When the amount of MgO addition is more than 2 % (mass), all metallic iron forms as laminate crystal, and iron whiskers could not be observed. |
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