共查询到18条相似文献,搜索用时 62 毫秒
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作者通过对国内外热轧带钢厂层流冷却水处理系统的研究、比较、分析,并根据自己的设计经验,就层流冷却水处理系统水量平衡、水质一稳定、工艺流程及节能措施提出了自己的看法。 相似文献
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热轧带钢层流冷却系统的设计 总被引:3,自引:0,他引:3
本钢1700mm热轧带钢层流冷却系统采用的是带钢管层流冷却和高压喷嘴冷却相结合的方式。介绍了此系统的设计过程及总用水量和上喷、下喷和侧喷水量的计算。 相似文献
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研究了莱钢1 500 mm热轧带钢生产线控冷系统存在的问题.对层流冷却设备和控制模型进行优化,改善了带钢表面存在斑点、花纹颜色不均等质量问题;提高了模型设定的准确性和灵活性,为新产品的开发奠定了坚实基础. 相似文献
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为了提高莱钢1500mm热连轧卷取温度的控制精度,对原基础自动化控制系统进行改造,增加了带Smith预估器的反馈控制和轧机抛钢后的冷却水前馈控制;同时增加了过程自动化控制系统,包括预设定计算、修正设定计算和自学习计算模块。系统改造后,带钢卷取温度控制不稳定的现象基本消除,实现了带钢的冷却模式、卷取温度和冷却速率的精确控制,提高了带钢的质量。 相似文献
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热轧带钢层流冷却控制技术的创新 总被引:3,自引:0,他引:3
剖析了传统热轧带钢冷却系统存在的冷却效果差、卷取温度不可控等问题。以国内最近投运的两条热轧线的实际经验为前提,阐述了一些新的控制技术。 相似文献
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XIE Hai-bo~ LIU Xiang-hua~ WANG Guo-dong~ ZHANG Zhong-ping~ . State Key Laboratory of Rolling Automation Northeastern University Shenyang Liaoning China . School of Mechanical Engineering Nanhua University Hengyang Hunan China . Hot Strip Mill Panzhihua Iron Steel 《钢铁研究学报(英文版)》2006,13(1):18-22
The microstructure and mechanical propertiesof hot rolled strips are determined by the tempera-ture drop fromthe exit of finishing stand to the coi-ler .Laminar coolingis an effective way to make theproducts with ideal microstructure and mechanicalproperties and the coiling temperature must be con-trolled properly[1 -4]. The traditional models cannot meet the require-ment for high precision of coiling temperature . Theai m of present work was to develop a newlaminarcooling system with satisfac… 相似文献
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GONG Dian-yao XU Jian-zhong PENG Liang-gui WANG Guo-dong LIU Xiang-hua 《钢铁研究学报(英文版)》2007,14(4):11-14
The mathematical model for online controlling hot rolled steel cooling on run-out table (ROT for abbreviation) was analyzed, and water cooling is found to be the main cooling mode for hot rolled steel. The calculation of the drop in strip temperature by both water cooling and air cooling is summed up to obtain the change of heat transfer coefficient. It is found that the learning coefficient of heat transfer coefficient is the kernel coefficient of coiler temperature control (CTC) model tuning. To decrease the deviation between the calculated steel temperature and the measured one at coiler entrance, a laminar cooling control self-learning strategy is used. Using the data acquired in the field, the results of the self-learning model used in the field were analyzed. The analyzed results show that the self-learning function is effective. 相似文献
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Hot Strip Laminar Cooling Control Model 总被引:6,自引:1,他引:5
WANGJun WANGGuo-dong LIUXiang-hua 《钢铁研究学报(英文版)》2004,11(5):13-17
The control model of laminar cooling system for hot strip, including air-cooling model, water-cooling model, temperature distribution model along thickness direction, feedforward control model, feedback control model and self-learning model, was introduced. PID arithmetic and Smith predictor controller were applied to feedback control. The sample of model parameter classification was given. The calculation process was shown by flow chart. The model has been proved to be simple, effective and of high precision. 相似文献
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热轧带钢层流冷却温度控制模型的应用分析 总被引:1,自引:0,他引:1
工业大学金属材料与加工重点实验室, 安徽 马鞍山 243002) 摘要:在带钢热轧后的冷却过程中,热轧带钢卷取温度的数学模型是至关重要的。介绍了某热轧带钢厂的卷取温度控制数学模型,针对传统的热轧带钢层流冷却卷曲温度控制中数学模型的固有缺陷,分别采用了差分方程和有限元数值模拟的方法,建立带钢厚度方向上的温度场。对测得的数据进行了分析,结果表明:在考虑带钢与介质的热交换的同时再考虑带钢内部的热传导大大提高模型的预报精度,为定量地描述计算值与实测值之间的偏差提供了依据。 相似文献
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LIU En-yang ZHANG Dian-hua SUN Jie PENG Liang-gui GAO Bai-hong SU Li-tao 《钢铁研究学报(英文版)》2012,19(4):39-42
Abstract: Feedback control is one of the most important ways to improve coiling temperature control precision during laminar cooling process. Laminar cooling equipments of a hot strip mill and structure of the control system were introduced. Feedback control algorithm based on PI controller and that based on Smith predictor were designed and tested in a hot strip mill respectively. Practical application shows that the feedback control system based on PI controller plays a limited role in improving coiling temperature control precision. The feedback control system based on Smith predictor runs stable and reliable. When the measured coiling temperature deviates from the target value, it can be adjusted to the required range quickly and steadily by Smith predictor feedback control, which improves the coiling temperature control precision greatly, and qualities of hot rolled strips are improved significantly. 相似文献
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HANBin ZHANGZhong-ping LIUXiang-hua WANGGuo-dong 《钢铁研究学报(英文版)》2005,12(3):18-21,27
Coilingtemperaturecontrolinhotstripmill playsaveryimportantroleindeterminingtheme chanicalpropertiesofthefinishedproduct[1].The earlypracticeofrunouttablecoolinginvolvedpre settingthewaterjetflowratebasedonexperience.Thisexperientialapproachwassufficientf… 相似文献