initial solidification(During continuous casting, the copper mold plates control the shape and initial solidification of the steel product. 连铸期间，结晶器铜板控制着钢铸坯的形状和初始凝固。)
initial silicon content(Silicon in hot metal has a strong effect on dephosphorization and this is shown in Fig3-5 from which it can be seen that the slope of the line connecting the initial and final phosphorus in hot metal, increases as the initial silicon content decreases. 铁水含硅量对脱磷有重要影响，由图 3-5 可以看出：铁水含磷量起点和终点连线的斜率随初始含硅量的降低而增加。)
