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为了研究性能稳定的低碳钢板坯连铸用无氟保护渣,在测试传统的板坯连铸用高氟保护渣(F-≥3%)性能的基础上,采用单纯形法,设计了CaO-SiO2-Al2O3-Fe2O3-MgO-Li2O-TiO2-Na2O-MnO-B2O3渣系中满足保护渣组成条件的基本实验点.通过逐步固定各组分含量,将多维空间的渣系组成转化为二维平面网格.测试无氟渣样的熔点、黏度、转折温度、玻璃体比例及转折温度时的黏度,并作性能与组成关系的等值线图.通过比较高氟保护渣和无氟渣样性能,确定了碱度、熔点、黏度、转折温度较低,且凝固后呈玻璃体的低碳钢板坯连铸用无氟保护渣的三个生成区域,其中之一的典型成分的质量分数范围是:CaO31.2%,SiO236.8%,Al2O33%,Fe2O31%,MgO2%,Li2O2%,TiO26%,Na2O7%～12%,MnO3%～8%,B2O30～3%.
In order to study the performance of low carbon steel slab continuous casting with non-fluoride mold flux, on the basis of testing the performance of traditional high felting slag (F-≥3%) for continuous casting, simplex method was used to design CaO -SiO2-Al2O3-Fe2O3-MgO-Li2O-TiO2-Na2O-MnO-B2O3 slag system to meet the composition of the conditions of the basic experimental points by gradually fixing the content of each component, the multi-dimensional space slag system into two-dimensional Plane grid.Calculation of the melting point, viscosity, transition temperature, glass ratio and the viscosity at the transition temperature of non-fluorocarbon slag samples, and the relationship between performance and composition of the contour map.Compared the properties of high-fluoride mold flux and non-fluorine slag , The three formation areas of basicity, melting point, viscosity, transition temperature and the non-fluoride mold flux for continuous casting of low-carbon steel slabs after solidification after glass solidification were determined. The mass fraction range of typical components of one of them is: CaO 31.2%, SiO2 36.8%, Al 2 O 33%, Fe 2 O 31%, MgO 2%, Li 2 O 2%, TiO 2 6%, Na 2 O 7% to 12%, MnO 3% to 8%, B 2 O 3% to 3%.