Abstract: An analysis on various factors to influence 80 t ladle sliding nozzle free-opening rate is carried out. Combined with the situation of steelmaking plant at Xiang Steel, by adopting measures including increasing quality of initiate packing sand and improving its adding method, improving base brick and upper nozzle structure, and decreasing waiting time of liquid for casting, the ladle free-opening rate at steelmaking plant increases to 96. 2% from original 84.3%.

摘要： 摘要对影响80 t钢包钢水自动引流率的各种因素进行了分析，并结合湘钢炼钢厂的实际情况，通过采取 提高引流砂质量和改善加入方法，改进座砖、上水口的结构，减少钢水待浇时间等措施，使炼钢厂钢包自动引流率 从原来的84. 3%提高至96. 2%。

关键词: 80t钢包, 滑动水口, 引流砂, 自动引流率