基于挥发对连铸保护渣熔点等值图测绘与评价  

Determination and evaluation of melting point isogram of continuous casting mold flux based on volatilization

作　　者：赵忠宇[1,2] 赵俊学 谭泽馨[1] 屈波樵 崔雅茹 ZHAO Zhongyu;ZHAO Junxue;TAN Zexin;QU Boqiao;CUI Yaru(School of Metallurgical Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,Shaanxi,China;CISDI Thermal and Environmental Engineering Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]中冶赛迪技术研究中心有限公司,重庆401120

出　　处：《钢铁研究学报》2021年第2期136-142,共7页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51674185,51674186)。

摘　　要：采用传统"半球点"测定法对连铸保护渣进行熔化温度检测,对比无氟渣在不同升温速率下熔化温度检测值差异,结果表明连铸保护渣熔化温度检测值随升温速率增大而降低,挥发的影响要远大于分熔的影响。采用二次回归正交设计试验方案,建立了关于碱度、Al2O3、CaF2、Na2O、MgO等组元变化的熔化温度非线性回归模型,测绘出关于助熔剂(Na2O+CaF2)组成变化的连铸保护渣熔化温度等值图,基于挥发影响对熔化后试样做XRF成分分析,对熔化温度回归模型和熔化温度等值图进行修正,对比得出,熔化温度检测过程Na2O和CaF2成分显著降低,熔化温度检测值相对理论值偏高。The "hemisphere method" was used to detect the melting point of continuous casting mold flux at different heating rates, and the results show that the influence of volatilization on melting point was greater than that of fractional melting compared with the fluorine-free slag. The melting point regression equation was obtained by nonlinear regression analysis of changes in alkalinity and Al2O3, CaF2, Na2O, MgO according to the orthogonal regression design. The melting point isogram of continuous casting mold flux was drawn on the composition of the flux(Na2O+CaF2). The regression model and isogram of melting temperature were modified according to volatilization of fluxes and XRF analysis of melted samples. It was obtained that Na2O and CaF2 were reduced significantly and the measured melting point was higher than the theoretical value.

关 键 词：连铸保护渣 熔点等值图 非线性回归模型 挥发 修正 

分 类 号：TF777[冶金工程—钢铁冶金]