论文部分内容阅读
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。
Carbonaceous reaction occurs during CO reduction sinter in blast furnace, which has adverse effect on blast furnace operation. The carbon evolution behavior of CO reduction sinter was analyzed by CS-8800 high frequency infrared carbon and sulfur analyzer. The microstructure of sinter after reduction was analyzed by Nova400NanoSEM field emission scanning electron microscope. The results show that as the temperature increases, the equilibrium concentration of CO in the carbon evolution reaction is higher, and the reaction is more difficult. At lower temperature, more carbon precipitated, and the precipitated carbon was mainly distributed in the surface and pores of sinter, while only trace amount of carbon was precipitated at higher temperature. CO2 was obviously inhibited in the system, and the amount of carbon Increase the reduction time increases.