高炉中CO 还原烧结矿过程中会发生析碳反应，对高炉操作产生不利的影响。采用 CS-8800型高频红外碳硫分析仪分析CO 还原烧结矿过程中的析碳行为，并采用 Nova400NanoSEM型场发射扫描电子显微镜分析还原后烧结矿微观结构。研究结果表明：随着温度的升高，析碳反应 CO 的平衡浓度越高，反应越难发生。在低温下析出的碳较多，析出的碳主要分布在烧结矿表面和气孔中，而在温度较高时只有微量碳析出；体系中 CO2对析碳反应有明显的抑制作用；析碳量随着还原时间的增加而增加。
Carbon-deposition reaction occurs during the reduction of sinter process in the blast furnace,and the car-bon-deposition reaction would have negative effect on the BF operation.The CS-8800 type high frequency infrared carbon sulfur analyzer was used to analyze carbon-deposition in the process of sinter reduction,and the reduced sinter microstructure was analyzed by Nova400NanoSEM type field emission scanning electron microscope (SEM). The results show that it is more difficult for the carbon-deposition reaction to occur as the equilibrium concentra-tions of CO and temperature increases.An amount of carbon precipitates at low temperature,which distributes mainly in the surface and porosity;by contrast,trace amounts of carbon precipitates at high temperature;CO2 in the system significantly inhibits the carbon-deposition;moreover,the amount of carbon deposition increases as the reduction process proceeds.
参考文献
| [1] | Dauter0liveira;WUSheng—li;DAIYu—ming;XUJian;CHEN Hong.Sintering Properties and Optimal Blending Schemes of Iron Ores[J].钢铁研究学报：英文版,2012(06):1-5. |
| [2] | 张玉柱;佘雪峰;邢宏伟.不同印度铁矿粉配比烧结矿的显微结构对烧结性能的影响[J].钢铁研究学报,2008(1):59-62. |
| [3] | 杨双平;石自新;刘振;李三军.翼钢烧结矿的冶金性能[J].钢铁研究学报,2008(12):59-62. |
| [4] | 潘利生;魏小林;彭岩;程波;李腾;李建强.烧结矿抗压及跌落强度试验研究[J].钢铁研究学报,2014(3):5-9. |
| [5] | 刘锦周;薛庆国;张仕洋;佘雪峰;王静松.氧气高炉循环煤气加热过程中的析碳行为[J].北京科技大学学报,2014(5):592-596. |
| [6] | Chen Li;Yixiang Shi;Ningsheng Cai.Carbon deposition on nickel cermet anodes of solid oxide fuel cells operating on carbon monoxide fuel[J].Journal of Power Sources,2013Mar.1(Mar.1):1-8. |
| [7] | A.Furusawa.Influence of Coal Moisture Control on Carbon Deposition in the Coke Oven Chamber[J].ISIJ International,199812(12):1320-1325. |
| [8] | 赵霞;李铁军;潘文.烧结矿气-固还原过程的矿物组成和显微结构变化[J].钢铁,2013(2):18-22. |
| [9] | Say Yei Foo;Chin Kui Cheng;Tuan-Huy Nguyen.Carbon deposition and gasification kinetics of used lanthanide-promoted Co-Ni/Al2O3 catalysts from CH4 dry reforming[J].Catalysis Communications,2012:183-188. |
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