【摘要】 在连铸流程生产Incoloy825耐蚀合金时，AOD精炼过程中精炼渣易与合金中Al、Ti元素发生反应造成氧化损失。因此，本研究在1 kg MoSi₂电阻炉中通过渣-金平衡试验考察了（CaO-SiO₂-Al₂O₃-MgO-CaF₂-TiO₂）精炼渣系不同成分设计对Incoloy825合金Al、Ti氧化烧损的影响，并对渣系的熔点、黏度以及物相性质进行了分析。结果表明：增加SiO₂的含量能降低平衡时合金中Al、Ti的含量，Al₂O₃组元会造成烧钛增铝的现象，适量TiO₂可以降低Ti元素的氧化烧损。提高渣系中CaO、TiO₂含量能提高精炼渣熔点，渣中SiO₂、Al₂O₃及CaF₂的含量增加会导致熔点下降；高温下精炼渣的黏度变化小且有明显的温度转折点，属于短渣类型，转折温度与熔点的规律一致；精炼渣配比为49.87%CaO-2.13%SiO₂-24.79%Al₂O₃-7.40%MgO-4.79%CaF₂-9.87%TiO₂时，Al、Ti烧损小且熔点和黏度均满足精炼要求。更多还原

【Abstract】 In the process of producing Incoloy825 corrosion resistant alloy in continuous casting, the refining slag is easy to react with Al and Ti elements in the alloy and cause oxidation loss in the AOD refining process. Therefore, the influence of different composition design of refining slag（CaO-SiO₂-Al₂O₃-MgO-CaF₂-TiO₂） on the oxidation loss of Al and Ti in Incoloy825 alloy was investigated by slag-steel equilibrium experiment in a 1 kg MoSi₂ resistance furnace, and the melting point, viscosity and phase characteristics of slag system were analyzed. The experimental results show that the increase of SiO₂ content in the slag will significantly reduce the Al and Ti content in the alloy at equilibrium, and the increase of Al₂O₃ content will lead to the phenomenon of increasing aluminum during titanium decreasing. Adding proper amount of TiO₂ component in the refining slag can reduce the oxidation loss of Ti. Increasing the content of CaO and TiO₂ in slag system can increase the melting point of refining slag, while increasing the content of SiO₂,Al₂O₃ and CaF₂ in slag can decrease the melting point of slag. The viscosity of refining slag at high temperature changes little and has obvious temperature turning point, which belongs to the type of short slag, and the law of turning point temperature is consistent with melting point. When the ratio of refining slag is 49.87 %CaO-2.13 %SiO₂-24.79 %Al₂O₃-7.40 %MgO-4.79 %CaF₂-9.87 %TiO₂,the oxidation loss of Al and Ti is the smallest, and the melting point and viscosity meet the refining requirements.更多还原