高炉标准大钟倾角是53°,落料水平行程为最大时的料钟的倾角就是最佳倾角。实际上,料钟落料运动过程可分为三个阶段(图1):原料从料钟、料斗之间的环形间隙漏下,原料沿料钟母线运动以及原料自由降落。在料钟下降行程终点,漏料运动实际上已停止,仅其它两个阶段还在继续。环形间隙出口处漏料速度V_0按下式计算: Standard blast furnace clock angle is 53 °, blanking horizontal stroke is the maximum when the clock’s inclination is the best inclination. In fact, the material chute blanking process can be divided into three stages (Figure 1): raw material from the bell, the annular gap between the hopper leakage, raw materials along the clock bus movement and the free fall of raw materials. At the end of the descent stroke of the material clock, the material leakage actually stopped and only the other two phases continued. The leakage rate V_0 at the exit of annular gap is calculated as follows: