论文部分内容阅读
冶炼铸造铁时,在炉缸周壁上有大量石墨碳沉积使炉缸受侵蚀不多,因而能维护炉缸.当冶炼制钢铁,由于在[Si]<1%时,[Si]对石墨化程度的影响不大,此时炉缸的维护主要不是靠石墨碳的析出,而主要取决于铁液中固相包含物(TiC、TiN等)的性质和数量,在有强烈冷却条件下能形成保护层对炉缸维护起着决定性的作用.因此,长期冶炼钢钢铁的高炉有必要把长期加入含钛炉料列为延长炉缸寿命的技术措施.对低硅生铁的冶炼来说,降低[S]比提高[Si]的护炉作用更有效也更经济.从炉缸维护及最大经济效益出发,当炉缸受到较严重侵蚀时,认为下述制钢铁的平均成份是合适的:Si0.35,Mn<0.30,P<0.050,S≤0.025,Ti0.1～0.15.
When smelting foundry iron, a large amount of graphite carbon deposited on the circumferential wall of the hearth causes little erosion of the hearth, thus maintaining the hearth.When smelting steel, [Si] Degree of influence is not significant, this time mainly to maintain the hearth is not graphite carbon precipitation, but mainly depends on the solid liquid inclusions (TiC, TiN, etc.) of the nature and quantity of the strong cooling conditions can be formed under Protective layer plays a decisive role in maintaining the hearth.Therefore, the long-term smelting of steel and steel needs to be added to the long-term inclusion of titanium furnace as a technical measure to extend the life of the hearth.For smelting low-silicon pig iron, reducing the [S ] Is more efficient and economical than the furnace protection effect of [Si] improvement.According to the maintenance of the hearth and the maximum economic efficiency, when the hearth is more seriously eroded, it is considered that the average composition of the following steel is suitable: Si 0.35 , Mn <0.30, P <0.050, S <0.025, Ti 0.1-0.15.