The preparation of spare full ladles at some steel works was analyzed for five reasons and the formula calculating the time of every procedure without spare full ladles are proposed.

• 针对一些钢厂在连铸机开浇前进行备包的现象,详细分析了其存在的5方面原因,提出了连铸机不备包情况下,各工序时间所应满足的计算公式。