Abstract: Using Factsage thermodynamic software to calculate in combination with laboratory research, the effects of basicity( 0.8 ～1.2 ), BaO( 5% ～15% ) and B₂O₃( 5% ～15% )content on mineralogical phases precipitation of CaO-SiO₂- Al₂O₃ -CaF₂ -Na₂O-MgO series mold fluxes for Fe-Ni-Cr corrosion resistant alloy during cooling are investigated. Results show that with the basicity of slag increasing form 0. 8 to 1. 2,the crystallization temperature increases from 1 201.7°C to 1 256. 4 °C ;the amount of precipitation of silicate minerals in slag decreases from 83. 1% to 79. 6% ;with the BaO content in the slag W10% , the crystal precipitation in the slag will be inhibited with the increase of BaO content. When 10% BaO is added to the slag, the total amount of crystal precipitation decreases to 61. 1 %. When 10% B₂0₃ is added to slag, the crystallization temperature decreases to 1 086, 7 °C ,and crystal precipitation is reduces to 66. 3% ;with B₂O₃ not less than 10% , and the phase formed by the slag is glass phase. The optimized basicity of slag is 1.0, and the added amaunt of BaO or B₂O₃ is 10% .

摘要： 采用 Factsage 热力学软件计算和实验室研究相结合的方法，探究碱度 ( 0. 8 ～ 1. 2 ) 、BaO 含量 ( 5% ～ 15% ) 、B₂ O₃ 含量(5% ～15% ) 对 Fe-Ni-Cr 系耐蚀合金连铸保护渣 CaO-SiO₂ -Al₂ O₃ -CaF₂ -Na₂ O-MgO 系冷却过程矿 相析出的影响 。 结果表明，当熔渣碱度由 0. 8 升高到 1. 2 时，析晶温度由1 201．7 ℃ 升高到1 256．4 ℃，硅酸盐含量 从 83. 1% 降低到 79. 6% ; 熔渣中 BaO≤10% 时，随着 BaO 含量的升高，熔渣中晶体析出会受到抑制 。当熔渣中添加 10% BaO 时，晶体析出总量降低到 61. 1 % ; 当熔渣中添加 10% B₂ O₃  时，晶体析出温度降低到1 086．7 ℃，晶体析出 量降低为 66. 3% ; B₂ O₃  含量≤10% 时，可以促进熔渣玻璃化 。 最佳碱度为 1．0，BaO 或 B₂ O₃  加入量为 10% 。

关键词: Fe-Ni-Cr系耐蚀合金 , 连铸保护渣 , Factsage , 矿相