无取向硅钢钢水钛质量分数影响因素分析

Analysis of influence factors for titanium mass fraction in non-oriented silicon steel

对于硅钢而言,残留的钛元素对磁性能存在有害影响,因此需尽可能降低钢中的钛质量分数。统计了一段时期内生产的不同牌号无取向硅钢的中间包钢水钛质量分数,进而分析了不同牌号无取向硅钢钢水钛质量分数的影响因素。结果表明,无取向硅钢钢水钛质量分数的影响因素主要有硅铁合金、脱硫喷粉过程和中间包钢水增钛,正常的平均增钛量分别为0.001 5%、0.000 3%和0.000 6%;随着无取向硅钢牌号的提高,中间包钢水平均钛质量分数随之增加;随着各牌号无取向硅钢中硅质量分数的提高,RH终点钢水平均钛质量分数也增加,且硅质量分数由0.31%提高至3.05%,则RH终点钢水平均钛质量分数由0.000 75%增加至0.002 03%。

The residual Ti element has a detrimental effect on magnetism,so the Ti mass fraction in the steel should be reduced as much as possible.The Ti mass fraction in tundish of non-oriented silicon steel with different grades for a period time was investigated,and the influence factors of Ti mass fraction were analyzed.The result shows that the main influence factors of excessive Ti mass fraction of non-oriented silicon steel are ferrosilicon alloy,desulphurization process by powder blowing and Ti increasing in tundish,whose normal average Ti increment is 0.001 5% ,0.000 3% and 0.000 6% ,respectively.The average Ti mass fraction in non-oriented silicon steel in the tundish increases with the improvement of grades.With the improvement of Si mass fraction in non-oriented silicon steel of different grades,the average Ti mass fraction in molten steel at the end of RH also increases.And it increases from 0.000 75% to 0.002 03% ,while the Si mass fraction increases from 0.31% to 3.05% .