The process measures to prevent stopper clogging have been presented by measuring materials of stopper and tundish submerged entry nozale and clogging for casting0.03%~0.06%Al cold heading steel and analysis on forma- tion mechanism of clogging. The measures are to adopted adding high AlMnFe alloy in tapping flow and feeding Al wire with argon blowing; tundish with dam and high liquid lever operation to promote Al

2

O

3

floating; whole process protective cast- ing;controling T[0

]

≤15×10

-6

after refining; decreasing Si0

2

content in head of stopper and increasing ZrO

2

content. The casting stopper nozzle clogging obviously decreased by using improved process operation

the average continuous casting heats were ≥12 heats.