热轧带钢宽度超差控制技术的改进与应用

发布时间：2018-07-25 17:09

【摘要】：热轧带钢广泛应用在建筑、汽车、石油、机械设备等关键领域,是重要的工业材料,在国民生产生活中占有重要地位。我国是全球最大的粗钢产量国,产能严重过剩,市场竞争极其激烈。努力提升带钢产品质量,是钢铁企业在竞争中制胜的关键因素。热轧带钢宽度是带钢外形尺寸中非常重要的参数,是热轧生产中重点控制的关键指标之一[1]。因此,结合实际生产情况,围绕热轧带钢宽度控制问题开展系统深入的研究工作具有重要的应用价值。本文以首钢京唐公司热轧2250mm、1580mm两条产线为背景,在大量阅读国内外相关文献的基础上,通过对现场带钢宽度超差问题的深入分析,以出现超差的位置差异为依据,将带钢宽度超差分为头部宽度超差、颈缩区宽度超差、尾部宽度超差和带钢整体宽度超差四大类。并针对各类宽度超差问题,提出了有效的改进措施,有效地实现了宽度精度控制,提高了带钢的宽度质量水平[2]。本文取得的主要成果及创新点包括:(1)提出了带钢头部宽度控制技术的改进措施,该方法已经实际应用于首钢京唐公司热轧2250mm产线,改进前后的带钢宽度偏差曲线结果表明该方法能够有效解决带钢头部宽度超差问题。(2)提出了带钢颈缩区宽度控制技术的改进措施,该方法已经实际应用于首钢京唐公司热轧1580mm产线,改进前后的带钢宽度曲线结果表明该方法能够有效解决带钢颈缩区宽窄问题。(3)提出了带钢尾部宽度控制技术的改进措施,其中,细化立辊尾部短行程控制模型层别方法已经实际应用于首钢京唐公司热轧2250mm产线,卷取工艺方面优化已经实际应用于首钢京唐公司热轧1580mm产线,通过对比改进前后统计数据及带钢宽度曲线,表明该方法能够有效解决带钢尾部宽度超差问题。(4)提出了带钢整体宽度控制技术的改进措施,该方法已经实际应用于首钢京唐公司热轧2250mm产线,改进前后带钢宽度偏差曲线结果表明该方法能够有效解决带钢整体宽度超差问题。
[Abstract]:Hot rolled strip is widely used in construction, automobile, petroleum, machinery and other key fields. It is an important industrial material and plays an important role in national production and life. China is the world's largest crude steel production country, overcapacity, market competition is extremely fierce. Improving the quality of strip products is the key factor to win the competition. The width of hot rolled strip is a very important parameter in strip shape size, and it is one of the key indexes in hot rolling production. Therefore, according to the actual production situation, it has important application value to carry out systematic and in-depth research on width control of hot rolled strip. Based on two hot rolling lines of 2250mm / 1580mm in Jingtang Company of Shougang Iron and Steel Co., this paper, on the basis of reading a large number of related documents at home and abroad, through the in-depth analysis of the over-difference of strip width on the spot, is based on the location difference of overpass. The width of the strip is divided into four categories: the head width, the necking zone, the tail width and the overall width of the strip. Aiming at various kinds of width overpass problems, effective improvement measures are put forward, the width precision control is realized effectively, and the width quality level of strip steel is improved [2]. The main achievements and innovations in this paper are as follows: (1) the improvement measures of strip head width control technology have been put forward. The method has been applied to the hot rolling 2250mm production line of Jingtang Company of Shougang Iron and Steel Co., Ltd. The results of the strip width deviation curve before and after improvement show that the method can effectively solve the problem of overwidth difference of the strip head. (2) the improvement measures for the width control technology of the necking zone of the strip are put forward. The method has been applied to the hot rolling 1580mm production line of Jingtang Company of Shougang Iron and Steel Co., Ltd., and the results of strip width curve before and after improvement show that the method can effectively solve the problem of strip necking width narrowing. (3) the improvement measures of strip tail width control technology are put forward. Among them, the method of thinning the model layer of short stroke control for the tail of vertical roller has been applied to the hot rolling 2250mm production line of Jingtang Company of Shougang, and the coiling process optimization has been applied to the hot rolling 1580mm production line of Jingtang Company of Shougang Iron and Steel Co. By comparing the statistical data before and after the improvement and the width curve of strip, it is shown that the method can effectively solve the problem of over-difference of strip tail width. (4) the improvement measures of overall width control technology of strip are put forward. The method has been applied to the hot rolling 2250mm production line of Jingtang Company of Shougang Iron and Steel Co. Ltd. The results of improving the width deviation curve of strip before and after the improvement show that the method can effectively solve the problem of the oversize of the overall width of strip.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG334.9

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