SPHC钢LF精炼过程钢水增硅分析

来源期刊：钢铁2009年第6期

论文作者：徐涛 孙彦辉 许中波 蔡开科

文章页码：28 - 31

关键词：SPHC钢； LF； 增硅； FactSage

Key words：SPHC steel； LF； silicon increasing； FactSage

摘    要：硅的控制是CSP工艺生产SPHC钢成分控制的一大难点。通过在国内某厂进行生产试验所获得的相关数据,利用FactSage热力学软件分析了增硅最严重的LF精炼过程钢中[Al]_s对硅含量控制的影响。结果发现:LF精炼结束时钢渣间还远未达到平衡,而且整个过程增硅趋势强烈;LF精炼过程增硅严重的主要原因是脱氧喂入了过量的铝,同时顶渣氧化性高也增加了钢中酸溶铝的损耗。

Abstract: The silicon controlling is a difficult point of composition control for SPHC steel in CSP process.Based on the production data from a certain domestic factory,the thermodynamical software FactSage was used to analyze the influence of [Al]_s on silicon content in molten steel during LF refining process which was the most serious process for silicon increase.The results show that the reaction between steel melt and top slag is far from the equilibrium,and the tendency of silicon increase is always strong in the whole process.The major reason for silicon serious increasing during LF refining process is that the amounts of aluminum addition for deoxidation was excessive.Meanwhile,the high oxidizability of top slag also increase the consumption of [Al]_s in molten steel.