石灰石与铁水中碳元素相互作用的试验研究  

Experimental study on the interaction between limestone and carbon in molten iron

作　　者：毛文文 李晨晓 张仕骏 石晓伟 路博勋 胡晓军[3] MAO Wenwen;LI Chenxiao;ZHANG Shijun;SHI Xiaowei;LU Boxun;HU Xiaojun(Technical Center of Tangshan Iron and Steel Group Co.,Ltd.,Tangshan 063000,China;College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]唐山钢铁集团有限责任公司技术中心,河北唐山063000 [2]华北理工大学冶金与能源学院,河北唐山063210 [3]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2021年第3期17-21,共5页Steelmaking

摘　　要：与石灰相比,转炉采用石灰石作为造渣剂时,石灰石在转炉内分解除生成石灰外,还会释放大量的CO_(2)。通过气相质谱仪在线分析了石灰石加入Fe-C熔体后尾气成分的变化,研究了石灰石分解CO_(2)对铁水的氧化作用,并通过热重试验分析了碳元素对石灰石分解温度的影响。结果表明,石灰石释放的CO_(2)与熔池中元素的作用是相互的。一方面,CO_(2)会与铁水发生氧化反应生成CO,其分解出的CO_(2)的利用率约为63%~71%。另一方面,碳元素与CO_(2)之间的反应能大大降低石灰石的分解温度。Compared with lime, when limestone is used as slagging agent in converter, limestone will release a lot of CO_(2) besides lime in converter. In this paper, the change of tail gas composition after limestone adding into Fe-C melt was analyzed by a gas mass spectrometer. The oxidation of molten iron by CO_(2) decomposition of limestone was studied, and the influence of carbon on limestone decomposition temperature was analyzed by thermogravimetry. The results showed that the interaction between CO_(2) released from limestone and elements in molten pool was interactive. On the one hand, CO_(2) will react with molten iron to form CO, and the utilization rate of CO_(2) decomposed was 63 %-71 %. On the other hand, the reaction between carbon and CO_(2) could greatly reduced the decomposition temperature of limestone.

关 键 词：石灰石 脱碳反应 CO_(2) 分解温度 

分 类 号：TF713.3[冶金工程—钢铁冶金]