利用ＺｒＯ_２固体电解质氧浓差电池测定了电渣重熔用ＣａＦ_２＋Ａｌ_２Ｏ_３和ＣａＦ_２＋Ａｌ_２Ｏ_３＋ＣａＯ系熔渣的氧渗透率，考察了熔渣成分及温度对熔渣传氧性能的影响．在１６７３—１８７３Ｋ和０．１ＭＰａ的氧气氛下，侧得这两个渣系熔渣的氧渗透率分别为１×１０－（２０）—６×１０－（１９）和１×１０￣（２１）—５×１０￣（１８）ｍｏｌＯ_２·ｃｍ￣（－１）·ｓ￣（－１）；随ＭｎＯ_２，Ｆｅ_２Ｏ_３，Ｃｒ_２Ｏ_３，ＴｉＯ_２，ＣａＦ_２含量和碱度（ＣａＯ／ＳｉＯ_２）的增高，熔渣的氧渗透率增大，ＭｎＯ_２和Ｆｅ_２Ｏ_３的影响尤为显著；随温度的升高，熔渣的氧渗透率增大，且可按速率过程来处理ＣａＦ２基多元复杂熔渣的传氧过程。
The permeability of oxygen through the molten slags of CaF_2+Al_2Os_3 and CaF_2+Al_2O_3+CaO systems for electrostag (ESR) was determined using. an oxygen concentration cell with ZrO_2 solid electrolyte. The effects of the components in the slags and temperture on the oxygen transfer property of the molten slags were considered. The permeability of the molten slags of these two systems whose compositions are essentially the same as the practical in the remelting,was obtained to be respectively 1× 10-20-6 × 10-19 and 1× 10-21-5 × 10-18 mol O2.cm-1.s-1 in the temperature range of 1673—1873 K under pure oxygen gas at 0.1 MPa. It increases with raising the contents of MnO_2, Fe_2O_3, Cr_2O_3, TiO_2,CaF_2and basicity in the molten slags, and the influence of MnO_2 and Fe_2O_3 is particularly remarkable. Also, it raises with an increase in temperature, and the oxygen transfer through the CaF_2-based multicomponent and complicate liquid slags may be treated as a rate process.The mechanism of oxygen transfer through the CaF_2-based liquid slags was discussed.
参考文献
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