Abstract: Based on insuring both mould slag with similar viscosity and melting temperature by using B₂O₃ as a substitute solvent to replace CaF₂ in fluorine-containing mould flux, the temperature and capacity of crystallization of fluorine-containing mould flux (%): 31. 1 ~ 35. 5CaO, 33. 9 〜38. 5SiO₂, 12A1₂O₃, 3MgO, 5Na₂O, 6 ~ 15CaF₂ and free-fluoride mould flux (%) ： 33. 5 ~ 35. 5CaO, 36. 5 ~ 39. 5SiO₂, 4Al₂O₃, 5MgO, 8 〜15Na₂O, 2Li₂O, 2 ~ 6B₂O₃, and influence on controlling heat transfer of mould have been studied. Results show that the viscosity and melting temperature of 5Na₂O- 6B₂O₃ free-fluoride flux are similar to that of 5Na₂O-15CaF₂ fluorine-containing flux and the functions of controlling heat transfer of mould are similar.

摘要： 用B₂O₃作为含氟渣中CaF2的替代熔剂,在保证两结晶器保护渣具有相近粘度和熔化温度的基础上,研究了成分为(%):31.1～35.5CaO、33.9～38.5SiO₂、12Al₂O₃、3MgO、5Na₂O、6～15CaF₂的含氟结晶器保护渣和(%):33.5～35.5CaO、36.5～39.5SiO₂、4Al₂O₃、5MgO、8～15Na₂O、2Li₂O、2～6B₂O₃的无氟结晶器保护渣的结晶温度、结晶能力以及对结晶器控制传热的影响。结果表明,8Na₂O-6B₂O₃无氟渣与5Na₂O-15CaF₂的含氟渣有相近的粘度和熔化温度,并对结晶器控制传热有相似的作用。 

关键词: 中碳钢连铸, 结晶器, 保护渣, CaF₂ , , B₂O₃, 物理性能