不锈钢AOD高硅冶炼工艺对镁钙砖的侵蚀  

Erosion of MgO-CaO bricks by stainless steel AOD high-silicon smelting process

作　　者：齐江涛 王琦[2] 李院高 李凤友 李振[1] 伊璞 王建昌[2] 罗宇尘 QI Jiangtao;WANG Qi;LI Yuangao;LI Fengyou;LI Zhen;YI Pu;WANG Jianchang;LUO Yuchen(Manufacturing Department,Shanxi Taigang Stainless Steel Co.,Ltd.,Taiyuan 030003,Shanxi,China;Technical Center,Shanxi Taigang Stainless Steel Co.,Ltd.,Taiyuan 030003,Shanxi,China;Shanxi Luweibao Taigang Refractories Co.,Ltd.,Taiyuan 030104,Shanxi,China)

机构地区：[1]山西太钢不锈钢股份有限公司制造部,山西太原030003 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003 [3]山西禄纬堡太钢耐火材料有限公司,山西太原030104

出　　处：《钢铁研究学报》2024年第11期1440-1448,共9页Journal of Iron and Steel Research

摘　　要：为探究不锈钢AOD高硅冶炼工艺对镁钙砖的侵蚀,通过对不锈钢AOD高硅渣、镁钙砖原砖和残砖的外观观察、化学分析和XRD分析,结合显微结构分析和热力学计算后得到:AOD高硅冶炼工艺产生的不锈钢AOD高硅渣为玻璃相,碱度1.02。不锈钢AOD高硅渣可以产生硅酸二钙,不锈钢AOD还原渣可以产生硅酸三钙。由于硅酸三钙对镁钙砖的影响小于硅酸二钙,所以不锈钢AOD高硅渣对镁钙砖的侵蚀质量分数大于不锈钢AOD还原渣。当耐火材料为100%时,不锈钢AOD高硅渣的侵蚀质量分数为53.8%,产生的渣质量分数为36.7%,单不锈钢AOD还原渣的侵蚀质量分数为35.1%,产生的渣质量分数为25.0%。当耐火材料与不锈钢AOD高硅渣反应后再与不锈钢AOD还原渣反应,不锈钢AOD还原渣侵蚀质量分数为46.2%,产生的渣质量分数为87.8%。因此,高硅冶炼工艺导致的双渣冶炼对镁钙砖的影响最大。In order to investigateonerosion of stainless steel AOD high silicon smelting process on MgO-CaO bricks,theobservation,chemical analysis and XRD analysis on stainless steel AOD slag in desilication period,the appearance of the used and unused MgO-CaO bricks,combined with microstructural analysis and thermodynamic calculations were studied.It was found that stainless steel AOD slag in desilication period produced by the AOD high silicon smelting process is glassy phase with basicity of 1.02.The effect of tricalcium silicate on MgO-CaO bricks is less than that of dicalcium silicate.Stainless steel AOD slag in desilication period can produce dicalcium silicate;stainless steel AOD slag in reduction period can produce tricalcium silicate;and stainless steel AOD slag in desilication period is more erosive than stainless steel AOD slag in reduction period to MgO-CaO bricks.When the refractories mass fraction is 100%,the erosion content of stainless steel AOD slag in desilication period is 53.8%,and the resulting slag mass fraction is 36.7%.The erosion content of stainless steel AOD slag in reduction period without stainless steel AOD slag in desilication period is 35.1%,and the resulting slag mass fraction is 25.0%.When refractory materials react with stainless steel AOD high silicon slag and then react with stainless steel AOD reduction slag,the corrosion mass fraction of stainless steel AOD reduction slag is 46.2%,and the slag mass fraction produced is 87.8%.Therefore,the double slag smelting caused by high silicon smelting process has the greatest impact on magnesia calcium bricks.

关 键 词：镁钙砖 不锈钢AOD高硅渣 AOD炉 双渣冶炼 

分 类 号：TF769.2[冶金工程—钢铁冶金]