Abstract: 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 Al₂O₃ floating; whole process protective cast- ing;controling T[0]≤15×10^-6after refining; decreasing Si0₂ content in head of stopper and increasing ZrO₂ content. The casting stopper nozzle clogging obviously decreased by using improved process operation,the average continuous casting heats were ≥12 heats.

Key words: Aluminum Bearing Cold Heading Steel, Continuous Casting, Stopper Clogging, Preventive Measures

摘要： 通过对连铸0.03%～0.06%Al冷镦钢中间包浸入式水口、塞棒耐火材料和结瘤物的检测和结瘤形成机理的分析,提出防止塞棒结瘤的工艺措施:采用出钢流加高铝锰铁合金和钢包吹氩喂铝线;中间包用挡墙和高液位操作以促进Al₂O₃上浮;全程保护浇铸;控制精炼后T[O]≤15×10^-6;降低塞棒头部SiO₂含量,提高ZrO₂含量。通过改进工艺操作,连铸塞棒水口结瘤明显减少,平均连浇炉数≥12炉。

关键词: 含铝冷镦钢, 连铸, 塞棒结瘤, 预防措施