铝镇静钢水口结瘤问题的实践研究

炼钢 ›› 2015, Vol. 31 ›› Issue (1): 56-60.

铝镇静钢水口结瘤问题的实践研究

乔焕山,王保生,王莉,陈玉鑫

首钢京唐钢铁联合有限责任公司

收稿日期:2014-04-28 修回日期:2014-06-24 接受日期:1900-01-01 出版日期:2015-02-05 发布日期:2015-02-13
通讯作者: 陈玉鑫 E-mail:yusinchain@163.com

Practice for decreasing nozzle clogging problem in continuous casting

Shougang Jingtang Irom&Steel United Co. Ltd.

Received:2014-04-28 Revised:2014-06-24 Accepted:1900-01-01 Online:2015-02-05 Published:2015-02-13

摘要/Abstract

摘要： 铝镇静钢浇铸过程存在的水口结瘤是钢铁企业中普遍存在的难题，结合生产实践中的水口结瘤现象，铝镇静钢水口结瘤按发生位置可分为钢包水口结瘤、塞棒头结瘤、上水口结瘤和浸入式水口结瘤。中等尺寸的夹杂物对水口堵塞影响较大；低拉速也增加水口结瘤的几率；不恰当的钙处理会加剧水口结瘤速度。为防止水口结瘤，需要较高的钢水洁净度、防止浇铸二次氧化，钙处理时要求w（Ca）/ w（Al夹杂）≥1.2。采取以上措施后，水口结瘤率平均由20.6 %降至4.52 %，平均连浇炉数平均由8.2炉提高到10.3炉。

关键词: 水口结瘤, 铝镇静钢, 钙处理, 二次氧化

Abstract: Nozzle clogging is one of the most famous problems during casting aluminum killed steel. Nozzle clogging can be divided into four kinds according to the position, ladle nozzle clogging, stopper head beard, upper nozzle clogging and SEN clogging, which summarized combining with production practices. The middle-size inclusions plays big role in clogging, which usually results from secondary oxidization. In the meantime, low casting speed would increase the probability of clogging, and inappropriate calcium treatment would make it happens much more seriously. In order to prevent nozzle clogging, the cleanliness of molten steel should be higer, and the measures for preventing secondary oxidization should be taken during casting, and w（Ca）/ w（Alin）≥1.2 should be ensured during calcium treatment. The rate of clogging decreased from 20.6 % to 4.52 %, and the heat number of sequence increased from 8.2 to 10.3 after taking the above actions.

Key words: nozzle clogging, aluminum killed steel, calcium treatment, secondary oxidization

中图分类号:

TF777.1

乔焕山，王保生，王莉，陈玉鑫. 铝镇静钢水口结瘤问题的实践研究[J]. 炼钢, 2015, 31(1): 56-60.

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