Abstract: The effect of B₂O₃ on melting temperature and complete melting time of 40.5%～70.0%CaO- 19%~   45%Al₂O₃-SiO₂-MgO- CaF₂ pentary slag series by semi- sphere point method has been studied. The test results showed that the average melting temperature of pentary slag with 40.5%~60%CaO,2%～10%CaE₂and(B₂O₃)/(CaF₂) 0. 17~0.33 was 30 ℃ less than that of pentary slag series without adding B₂O3 and the average complete melting time decreased by 49 s as compared with that without adding B₂O₃.The available multicomponent desulphurization refining slag ingredient is 60%CaO,19%～30%Al₂O₃,≤10%(MgO+SiO₂),2%~6%CaF₂and(B₂O₃)/(CaF₂)=0.17.

摘要： 通过半球点法研究了B₂O₃对40.5％-70．0％CaO-19％-45％Al₂O₃-SiO2-MgO-CaF₂五元渣系熔化温度和完全熔化时间的影响。实验结果表明,当渣中CaO含量为40．5％～60％,CaF₂ 2％-10％,(B₂O₃％)/ (CaF₂％)为0.17～0.33时,渣系的熔化温度较不加B₂O₃的五元渣平均降低30℃,完全熔化时间平均降低49 s。合适的多元脱硫精炼渣系的成分为60％CaO,19％-30％Al₂O₃,≤10％(MgO+SiO₂),2％～6％CaF₂, (B₂O₃)／(CaF₂)=0．17。