工程科学学报2015，Vol.37Issue(11)：1422-1428,7.DOI:10.13374/j.issn2095-9389.2015.11.005
超低碳钢BOF渣成分对终点[ C ]含量影响
Effect of BOF slag composition on the end-point [ C] content of ultra-low carbon steel
张明博 1秦哲 2仇圣桃 3朱荣 2白瑞国 2张兴利1
作者信息
- 1. 北京科技大学冶金与生态工程学院, 北京100083
- 2. 钢铁研究总院连铸技术国家工程研究中心, 北京100081
- 3. 河北钢铁股份有限公司承德分公司, 承德067002
- 折叠
摘要
Abstract
The effect of slag composition on the [ C] content of ultra-low carbon steel at the end of smelting was investigated by the coexistence theory, dynamics analysis and experimental verification. A regression model of end-point [ C] content was established with temperature and slag composition in a temperature range from 1853 K to 1973 K. The results show that the FeO activity is little affected by temperature, while it is mainly affected by slag composition. However, the decarburization kinetics is mainly affected by slag composition and temperature. The end-point [ C] content increases with increasing slag basicity, but it quickly decreases with increasing FeO content in slag, so the end-point FeO mass fraction in slag should be controlled in 12% -18%. In addition, the incre-ment value of [ C] is less than 0. 01% with the MgO mass fraction in slag from 7% to 13%. The results also show that the end-point [ C] mass fraction decreases with increasing temperature. Compared with industrial results, the average error rate of the regression model for the end-point [ C] content in the ultra-low carbon steel is ± 15. 25%, and the hit rate to [ C] content predicted by the regression model reaches 69. 19% with a control precision of ± 0. 01% for heats of the experiment.关键词
炼钢/低碳钢/渣成分/碳含量/回归模型Key words
steelmaking/low carbon steel/slag composition/carbon content/regression models分类
矿业与冶金引用本文复制引用
张明博,秦哲,仇圣桃,朱荣,白瑞国,张兴利..超低碳钢BOF渣成分对终点[ C ]含量影响[J].工程科学学报,2015,37(11):1422-1428,7.
