通过热力学计算,讨论了影响高熔点Ti（C,N）在炉内沉积的因素以及可能导致钛矿护炉效果不佳的原因。结果表明,铁水中的硅含量限制了铁水中的钛含量（w（[Ti]）≤0.2 w（[Si]））,所以控制适合的冶炼温度促进渣中TiO2还原的同时还要提高铁水中的硅含量,以保证铁水中有足够的钛;另一方面,要通过降低侵蚀炭砖表面温度来降低钛的溶解度,促进侵蚀部位铁水中钛的析出。通过钛平衡计算得知,护炉时需要长期加入含钛炉料,使得含钛保护层脱落后能在短时间内迅速形成。
The influencing factors for the precipitation of titanium carbonitride and the reasons of unsatisfactory protecting performance were discussed with thermodynamics calculation.The result indicates that silicon content can restrict the titanium content in hot metal.So temperature of hot metal should be kept in the appropriate limits to promote the reduction of TiO2 in slag and silicon content should be increased to ensure that the titanium content is enough in hot metal.On the other hand,decreasing the surface temperature of eroded carbon brick can reduce the solubility of titanium,which can improve the precipitation of titanium in hot metal.Further more,titanium-bearing materials should be used in production process of blast furnace for a long time.The titanium covering layer can be formed in a short time after being peeled off,which can be got by the calculation of titanium balance.
参考文献
| [1] | 马家源;孙希文;刁日升.高炉冶炼钒钛磁铁矿理论与实践[M].北京:冶金工业出版社,2000 |
| [2] | Narita Kiich;Maeicawa Masahiro;Onoye Toshio et al.For- mation of Titanium Compounds,So-Called Titanium-Bear,inthe Blast Furnace Hearth[J].Transactions of the Iron and Steel Institute of Japan,1977,17:459. |
| [3] | 李永全,Yun Li,R J Fruehan.高炉钛矿护炉的机理研究[J].宝钢技术,2002(01):12-16. |
| [4] | Ozturk B;Fruehan R J.Thermodynamics of Inclusion Forma- tion in Fe-Ti-C N Alloys[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1990(21B):879. |
| [5] | 黄希祜.钢铁冶金原理[M].北京:冶金工业出版社,2008:110. |
| [6] | 杜鹤桂.高炉冶炼钒钛磁铁矿原理[M].北京:科学出版社,1996:44. |
| [7] | 宋建成.高炉含钛物料护炉技术[M].北京:冶金工业出版社,1994:49. |
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