Thermodynamics and Industrial Trial on Increasing the Carbon Content at the BOF Endpoint to Produce Ultra-Low Carbon IF Steel by BOF-RH-CSP Process
Thermodynamics and Industrial Trial on Increasing the Carbon Content at the BOF Endpoint to Produce Ultra-Low Carbon IF Steel by BOF-RH-CSP Process
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BOF-RH-CSP工艺提高转炉终点碳含量生产超低碳IF钢的热力学及工业试验
DOI：
10.1515/htmp-2019-0054
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发表时间：
2019-01
影响因子：
1.5
通讯作者：
Guo Hanjie
中科院分区：
文献类型：
--
作者：
Guo Jing;Cheng Shu Sen;Guo Hanjie
摘要利用热力学计算软件FactSage，对转炉终点碳含量与钢水溶解氧含量、炉渣（FeO + MnO）含量之间的关系进行了热力学分析。结果表明，[O]和（FeO + MnO）含量随转炉末端碳含量的降低而增加，且碳含量越低，增加幅度越大。此外，转炉末端温度越高，钢液中的[O]含量越高，炉渣中的（FeO + MnO）含量也越高。转炉末端脱碳耗氧量远大于RH脱气器，因为转炉末端吹出的大部分氧气会在炉渣中生成FeO，从而增加了冶炼过程中金属的损失，降低了钢材的清洁度。因此，在RH脱碳能力范围内，应适当提高转炉末端的碳含量。最后进行了工业试验，结果表明，随着转炉终点碳含量从0.042%提高到0.081%，转炉终渣的总耗氧量和（FeO + MnO）明显下降。此外，它几乎不减慢RH过程，最终钢的含碳量都满足超低碳钢的要求。此外，转炉终点含碳量高的IF钢的力学性能几乎都优于转炉终点含碳量低的热钢。
Abstract Thermodynamic analysis was performed to obtain the relation between the carbon content at the BOF endpoint and the dissolved oxygen content in liquid steel and the (FeO + MnO) content in the slag with the help of thermodynamic calculation software FactSage. It finds that both the [O] and (FeO + MnO) content increase with decreasing the carbon content at the BOF endpoint and the increasing rate is larger when the carbon content is lower. In addition, in the case of the higher temperature at the BOF endpoint the [O] in liquid steel increase and the (FeO + MnO) in the slag increase as well. The consumption of O2 for decarbonization at the BOF endpoint is much more than that in RH degasser since the majority of the blowing O2 at the BOF endpoint will produce FeO into the slag, thus it increase the metal loss and deteriorate the steel cleanness during the consequent refining process. As a result, the carbon content at the BOF endpoint should be properly increased within the RH decarbonization ability. At last, industrial trials were carried out and confirmed that total oxygen consumption decrease obviously and the (FeO + MnO) of final BOF slag decline as well with increasing carbon content at BOF endpoint from 0.042% to 0.081%. In addition, it almost does not slow down the RH process and the carbon content in final steel all met the demand of the ultra-low carbon steel. In addition, mechanical properties of IF steel with higher carbon content at the endpoint of BOF are almost all more superior to those of heat with lower carbon content at BOF endpoint.
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DOI：
10.1016/0360-8352(96)00083-6
发表时间：
1996-10
期刊：
--
影响因子：
--
作者：
C. S. Shukla;Michelle Vazquez;F. F. Chen-F.
通讯作者：
C. S. Shukla;Michelle Vazquez;F. F. Chen-F.
影响因子：
1.8
作者：
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通讯作者：
H. Takechi
影响因子：
1.8
作者：
S. Basu;S. Choudhary;N. Girase
通讯作者：
S. Basu;S. Choudhary;N. Girase
影响因子：
1.8
作者：
Yasumitsu Kondo;Hiroshi Tanei;N. Suzuki;K. Ushioda;M. Maeda
通讯作者：
Yasumitsu Kondo;Hiroshi Tanei;N. Suzuki;K. Ushioda;M. Maeda