| 富氢气体直接还原铁矿石及其碳沉积行为 |
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| 引用本文： | 耿淑华,丁伟中,郭曙强,方展,邹星礼,鲁雄刚.富氢气体直接还原铁矿石及其碳沉积行为[J].上海大学学报(自然科学版),2015,21(6):749-756. |
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| 作者姓名： | 耿淑华 丁伟中 郭曙强 方展 邹星礼 鲁雄刚 |
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| 作者单位： | 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 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(2014CB643403); 国家杰出青年科学基金资助项目(51225401) |
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| 摘 要： | 焦炉煤气改质后可用于生产直接还原铁, 为炼钢提供优质的原料. 利用热重分析法, 研究了H2 与CO 物质的量比(H2/CO)、温度对铁矿石球团矿还原速率及其碳沉积速率的影响. 实验结果表明: H2 的还原能力大于CO, 且随着混合气体中H2 含量的增加, 铁矿石球团矿的 还原速率增大; 当H2/CO 比大于8/2 时, 增加H2 含量对还原速率影响减小; 在铁矿石还原 后期出现碳沉积, 且碳沉积速率随着H2 含量的增加而减小; 低温易于碳沉积, 但当温度高于 850 °C 时, 碳沉积得到抑制.
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| 关 键 词： | 富氢气体 球团矿 碳沉积 直接还原 |
| 收稿时间： | 2015-04-07 |
Direct reduction of iron ore by hydrogen-rich gases and the carbon deposition behavior |
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| GENG Shu-Hua,DING Wei-Zhong,GUO Shu-Qiang,FANG Zhan,ZOU Xing-Li,LU Xiong-Gang.Direct reduction of iron ore by hydrogen-rich gases and the carbon deposition behavior[J].Journal of Shanghai University(Natural Science),2015,21(6):749-756. |
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| Authors: | GENG Shu-Hua DING Wei-Zhong GUO Shu-Qiang FANG Zhan ZOU Xing-Li LU Xiong-Gang |
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| Affiliation: | State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China |
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| Abstract: | Reformed coke oven gas (COG), a high quality raw material in steelmaking, can be used to produce direct reduced iron (DRI). In this work, the influences of H2/CO ratio and temperature on the reduction rate and carbon deposition behavior during the reduction process of iron ore are investigated by thermo- gravimetric analysis. The experimental results show that the reduction capacity of H2 is higher than that of CO. The reduction rate increases with the increase of H2 concentration in the mixture gases. When H2/CO ratio is higher than 8/2, the influence of H2 concentration in the mixture gases on the reduction rate decreases. Carbon deposition is observed in the later stage of the COrich gases reduction process. The carbon deposition rate decreases with the increase of H2 concentration in the mixture gases. Carbon deposition occurs preferentially at low temperature. When the temperature is above 850 C, carbon deposition is suppressed. |
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| Keywords: | carbon deposition direct reduction hydrogen-rich gas iron ore pellet |
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