共查询到20条相似文献,搜索用时 156 毫秒
1.
前言Foreword我国大型铝电解槽槽壳普遍采用单或双围带摇篮架式槽壳结构,能够承担和克服内衬材料在高温下产生的热应力和化学反应膨胀产生的力,实践证明在生产过程中变形小,能够满足要求是成功的。但由于开发时间短,使用一个周期后,在电解槽大修时出现了新的结构变形,即在电解槽断电冷却过程中产生的热变形,且变形严重难以校正,给电解槽的大修和槽壳的再次利用带来困难。所以,克服或减少大修槽壳变形是大型铝电解槽生产企业刻不客缓的事情。铝电解槽槽壳变形原因的分析Causative analysis of deformation of aluminum electrolytic cell sh… 相似文献
2.
3.
4.
5.
6.
金属结构在焊接过程中由于不均匀加热会产生应力和引起变形,因而在实际施工中,找出规律,采取各种方法来控制变形,以减小焊接应力与变形的危害。举例说明了在电解槽制作中采用反变形法对保证焊接质量的作用。 相似文献
7.
通过对铝电解槽槽壳的受力和变形机理的分析,讨论了槽壳主要破坏形式,总结了槽壳设计的主要特点,并对槽壳发展的最新动向进行了展望。 相似文献
8.
论铝电解槽阴极结构的改进 总被引:1,自引:0,他引:1
本文从铝电解槽的槽壳、保温材料、耐火材料及炭素内衬四部分分析了其对阴极使用寿命的影响。论述了铝电解槽阴极内衬保温结构的合理配置,采用干法砌筑耐火砖、混凝土浇注过程中砌入硅澡土保温砖以及采用冷捣糊扎固侧部四角的新工艺。解决了炉底上抬、电解质及铝液的下渗、侧部四角难以施工等难题。从而达到减轻槽壳的变形、稳定铝电解生产、降低生产成本及消耗、延长阴极使用寿命之目的。 相似文献
9.
10.
青海盐湖集团10万t/a电解镁装置中,镁电解槽与传统的铝电解槽及国内其它小型镁电解槽有很大不同,施工差异较大,施工工艺复杂且整体密封性要求高。电解车间共有68台电解槽,施工作业主要为安装槽壳砌筑内衬。施工中采取了一系列施工措施,保证了工程质量,加快了工程进度,降低了施工成本。 相似文献
11.
提出了在焊接 H型钢焊接制作过程中采取预留收缩量、反变形施焊、制定合理的焊接工艺、预制上拱度等措施以控制变形 ,同时介绍了挠曲变形、拱变形、角变形的矫正方法 相似文献
12.
13.
14.
15.
Hiroyuki Matsunaga 《Canadian Metallurgical Quarterly》1999,125(6):613-621
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. 相似文献
16.
210 t转炉是包钢薄板坯连铸连轧厂的主要设备,而炉壳是其重要部件,焊接工艺直接影响薄板的正常生产.文章介绍了该炉壳焊接工艺方案的选择、制定及效果. 相似文献
17.
介绍了铝电解轨道接头压馈的情况及产生的主要原因,通过对其材料的技术性能,钢的焊接性能的分析,确定了运用手工焊的方案和焊接材料的选择以及焊接施工的工艺。通过实践证明了该技术的可行性。 相似文献
18.
A new formulation in which the assumed stress field is divided into membrane and bending stress fields is developed. A family of effective shell elements of hybrid/mixed finite element method that accounts for transverse shear deformations is proposed based on a modified Hellinger–Reissner variational principle. In this paper, the present shell elements possess different three-field assumptions, which are described by compatible displacement, incompatible displacement, and stress fields. Several benchmark problems are conducted to test both the accuracy and reliability of the proposed shell elements. Numerical analyses show that the present shell elements pass all the patch tests, do not contain any spurious zero energy modes, and have no lock phenomena even for very thin plate and shell. Further insight into the performance of the present shell elements is gained to demonstrate the high accuracy of the elements by several folded-plate structure problems. The numerical results demonstrate the validity, reliability, and applicability of the present elements. The present elements are valid for thick as well as thin shell structures. 相似文献
19.
文章对包头铝厂电解厂房使用的135 kA预焙阳极铝电解槽易出现故障的铝母线焊接问题进行了分析,主要介绍屏蔽技术在铝母线焊接中的应用、效果。采用屏蔽技术简单、易行,可保证正常生产,提高生产效率。 相似文献
20.
焊接十字形断面柱的结构特殊。对制作工艺及焊接变形控制要求较高。在实际生产中采用预先进行应力消除,组对时不加拘束,焊接时分段同向跳焊的方法成功地完成了对这一构件的制作。 相似文献