宝钢3号高炉炉壳开孔强度有限元计算

针对宝钢３号高炉因安装冷却筒需要在炉壳上开孔问题,依据宝钢３号高炉实际情况,进行炉壳整体应力计算,并以此为依据,模拟高炉炉壳开孔的各种模型,分别进行高炉炉壳开孔强度弹笥应力计算、塑性应力计算以及工应力计算。为验证计算的可靠性,制作了光弹实验模型,进行光弹性应力分析,得到与有限元弹性应力计算相吻合的结果。     

唐钢2#高炉大修工程炉壳设计与受力分析

从高炉炉壳分块、炉壳材质的选用、炉壳厚度的确定及炉壳上开孔等方面对炉壳的设计进行了分析,用有限元分析软件MSC＼NASTRAN对高炉炉身炉壳做了弹塑性有限元应力分析,给出了炉壳在不同的环向和径向应力比情况下,进入塑性状态和达到破坏状态的载荷和发展过程.     

带灌浆孔高炉冷却板

本实用新型涉及一种高炉冷却板,特别涉及一种带灌浆孔高炉冷却板。解决现有高炉存在的再造被侵蚀的内衬,只能在炉壳上开孔进行灌浆造衬,导致对炉壳的强度、高炉的长寿等方面带来不利影响。本实用新型的技术方案为：一种带灌浆孔高炉冷却板,为带空腔的板形结构,在冷却板中部设置带有球阀的灌浆孔.     

5号高炉2号热风炉内衬破损抢修实践

武钢5号高炉2号热风炉拱脚处内衬面积损坏,炉壳表面温度高达471C,在炉壳上开孔填充可塑料造衬后,使炉壳温度降低300C。     

3 200 m3高炉炉壳工厂化平面开孔施工技术

论述了在天钢3 200 m3高炉炉壳开孔施工中,成功地采用了工厂化开孔新技术,在工期、质量、效益方面取得了良好的效果.     

冷却壁和微型冷却器相结合的维修技术在三高炉的应用

宝钢高炉开发冷却壁与微型冷却器相结合的一整套维修技术革应用在宝钢３ＢＦ上,确保了高炉长寿：（１）研制了微型冷却器和炉墙开孔机及其刀具等设备;（２）开发了在冷却壁水管损坏处安装微型冷却器的施工工艺等一整套冷却维修新技术;（３）开发了由有凶法应力和屈曲稳定性计算及光弹性实验应力分析确定炉墙开孔部位的方法;（４）开发了炉墙开孔新工艺。     

莱钢1#750m3高炉炉壳变形开裂原因分析及改进

从冶炼强度、冷却强度、温度变化等几方面分析了莱钢 1#75 0 m3高炉炉壳变形、冷却壁损坏的原因。通过采取提高冷却强度、将冷却壁材质由耐热铸铁 RTCr-0 .5改为球墨铸铁 QT40 0 -18、改变冷却壁套管与炉壳间的安装方式、冷却壁之间填充碳化硅质的填料、控制炉壳开孔数量及质量、加强冶炼操作稳定炉况等措施 ,延长了高炉炉体的使用寿命。     

本钢5号高炉冷却壁制造偏差检测及处理措施

1 问题的提出 2001年本钢5号高炉大修扩容改造(由2000m~3扩至2600m~3)炉体要安装400多块冷却壁,需在炉壳上开孔4000多个,开孔在工厂进行。2001年2月,我们对已制造完毕的300多块冷却壁抽样作了外型检测及模拟炉壳试组装,结果发现,虽然单块外型检测基本符合要求,但70%冷却壁的冷却水管保     

高炉内材修补技术的发展

高炉内衬的修补方法一般来说有压浆造村技术、冷喷补技术、炉壳开孔使用长枪喷补技术以及遥控喷补技术。详细介绍了这几种修补技术的特点、修补过程和适用范围。     

高炉内衬修补技术的发展

高炉内衬的修补方法一般来说有压浆造衬技术、冷喷补技术、炉壳开孔使用长枪喷补技术以及遥控喷补技术。详细介绍了这几种修补技术的特点、修过程和适用范围。     

连续退火机组缓冷炉带钢瓢曲原因分析

针对宝钢某单元连续退火机组发生的薄板轻微热瓢曲问题,对影响退火炉带钢瓢曲因素进行了调查,并对板带截面试样进行金相分析,进而对带钢瓢曲缺陷与冷却段的相关性设计针对性生产试验,最终成功将带钢瓢曲缺陷的发生锁定在缓冷炉(SCF)的顶辊上。最后围绕顶辊的辊型和材质分析了带钢瓢曲缺陷产生的原因,并对现场使用时间长的炉辊周期维护提出了建议。     

立式退火炉带钢运行稳定性控制

带钢瓢曲是影响带钢炉内稳定运行的主要因素,为防止带钢在炉内发生瓢曲,提高带钢炉内运行稳定性,提出优化炉区张力设定方法,同时增加原料带钢易瓢曲等级判定以及产线降速过程中炉区最低运行速度功能,为预防带钢瓢曲提供可靠数据依据,旨在减少带钢炉内瓢曲,避免由于带钢瓢曲造成炉内断带。实际应用效果表明,提出的炉区张力优化、带钢易瓢曲等级判定及炉区最低运行速度功能能够满足现场实际应用需求,可有效提高带钢炉内运行稳定性。     

泰钢1^#高炉长期封炉及扒炉实践

泰钢1^#高炉通过焊补炉壳、堵严风口、装入水渣、降低冷却强度、关闭炉顶大放散等措施实施了封炉操作。因不具备开炉条件,且料线下降了约7m,因此,通过氮气灭炉,炉顶打水凉炉,进行了清理炉料、炉缸的扒炉操作。高炉炉身4层钩头冷却壁以上的砖衬比较完整,炉身下部、炉腰、炉腹部位完全没有砖衬,说明必须根据炉衬的实际工作状况,制定有效的抑制边缘气流的措施并且加强高炉炉身中下部、炉腰、炉腹的冷却制度管理,才能延长一代炉龄。     

Buckling of Vertical Cylindrical Shells Under Combined End Pressure and Body Force

This paper is concerned with the elastic buckling of vertical cylindrical shells under combined end pressure and body force. Such buckling problems are encountered when cylindrical shells are used in a high-g environment such as the launching of rockets and missiles under high-propulsive power. The vertical shells may have any combination of free, simply supported, and clamped ends. Based on the Goldenveizer-Novozhilov thin shell theory, the total potential energy functional is presented and the buckling problem is solved using the Ritz method. Highlight in the formulation is the importance of the correct potential energy functional which includes the shell shortening due to the circumferential displacement. The omission of this contributing term leads to erroneous buckling solutions when the cylindrical shell is not of moderate length (length-to-radius ratio smaller than 0.7 or larger than 3). New solutions for body-force buckling parameters are presented for stubby cylindrical shells to long tube-like shells that approach the behavior of columns. The effects of the shell thickness and length on buckling parameter are also investigated.     

高炉炉壁侵蚀状态预测的神经网络分析法

采用二雏简化的炉壁模型，用ANSYS软件进行热传导仿真计算；同时在MATLSAB环境中建立BP网络模型，并利用炉壳外部测点的温度值识别炉壁侵蚀线，从而证明了神经网络方法在高炉炉壁侵蚀状态预测中应用的可行性。     

高炉炉壁侵蚀状态预测的神经网络分析法

采用二维简化的炉壁模型，用ANSYS软件进行热传导仿真计算，同时在MATLAB环境中建立BP网络模型，并利用炉壳外部测点的温度值识别炉壁侵蚀线，从而证明了神经网络方法在高炉炉壁侵蚀状态预测中应用的可行性。     

Buckling of Homogeneous Isotropic Cylindrical Shells under Axial Stress

A 2D higher-order shell theory that can take into account the complete effects of higher-order deformations is applied to the buckling problems of a thick circular cylindrical shell subjected to axial compression. The effects of higher-order deformations such as shear deformations and thickness changes on buckling stresses of homogeneous isotropic circular cylindrical shells are studied. Based on the power series expansion of displacement components, a set of fundamental equations of a 2D higher-order shell theory is derived through the principle of virtual displacements. Several sets of truncated approximate theories are applied to solve the buckling problems of a simply supported thick circular cylindrical shell. To assure the accuracy of the present theory, the convergence of the buckling stresses is examined in detail, and the results are compared with those obtained in existing theories.     

Compression Tests on Cylinders with Circumferential Weld Depressions

The behavior of thin cylindrical shells under axial compression is very sensitive to imperfections in the initial geometry. Local axisymmetric imperfections are among the most detrimental and have been shown to be a regular feature of circumferentially welded joints in civil engineering shell structures such as steel silos and tanks. Many of the experiments on which current design rules are based were performed on elastic Mylar, copper, or aluminum specimens, which have some very different characteristics to those of steel shells. Furthermore, very few laboratory tests have ever examined the consequences of fabrication processes on shell buckling strength, although these strongly influence the amplitudes and forms of geometric imperfections. This paper presents the findings of a careful experimental program on large steel cylinders fabricated with a fully welded circumferential joint. Thorough measurements were made of the initial imperfections and their transformation into a buckling mode. The results are compared with elastic-plastic finite-element predictions and the most recent design standard.     

沸腾炉壳体腐蚀与外保温的探讨

介绍了沸腾炉炉壳腐蚀现象以及对工厂生产带来的危害，分析硫酸在炉壳上结露造成腐蚀的原因，通过计算证明沸腾炉炉壳工作温度低于硫酸露点温度．并提出了采用外保温防止结露的措施来解决炉壳腐蚀问题。     

解决中天钢铁高炉炉壳上涨实践

 高炉炉壳上涨是近几年钢铁企业部分高炉面临的一个难题,控制高炉炉壳上涨对高炉的长寿、安全稳定运行有重要意义。针对中天高炉炉壳上涨问题,以压力容器盲板力的计算为依据,结合长期分析和治理实践,明确了高炉炉壳上涨的关键原因是由炉内压力产生的盲板力所导致;并给出了高炉炉壳上涨的5个具体步骤,炉底板变形,炉内耐材变形,耐材之间出现缝隙,有害金属沿着缝隙富集,炉壳逐步长高。在此基础上,针对性地研发了双炉底板结构,并在中天钢铁的多座高炉上进行了成功应用,解决了高炉炉壳上涨的难题。将探索高炉炉壳上涨原因的焦点从原料、操作、施工和耐材材质等方面转向高炉炉底板自身强度上。