浅谈铝电解槽规整炉膛的重要性及其建立

规整的炉膛是铝电解槽高效平稳生产的保证，主要阐述了规整炉膛的重要性。良好炉膛建立取决于非正常期技术条件的合理保持。正常生产期间规整炉膛的保持和维护。     

论如何提高铝电解槽运行的稳定性

稳定过热度可以使铝电解槽炉膛趋于稳定,精准的换极、出铝操作及合理的热损失分布有利于炉膛趋于规整,提高电解槽运行的稳定性。     

大型预焙铝电解槽电解质过热度的测定以及炉帮与过热度的关系

铝电解槽炉膛内形的规整与否严重影响着电流效率,而铝电解槽的炉膛内形与电解质的过热度有很大的关系。本文通过现场测试电解温度和炉帮厚度,实验室测定电解质初晶温度的方法,考察了电解质的过热度以及过热度与炉帮厚度之间的关系。通过研究发现,过热度低于12℃时,电解槽可形成良好炉帮。     

铝电解槽早期炉膛的建立

论述了铝电解槽早期炉膛建立的意义，通过计算说明了建立规整高熔点炉帮的方法及在日常生产管理中维护好炉膛的主要措施。     

浅谈500 kA预焙铝电解槽炉膛管理

500 kA预焙铝电解槽逐渐成为我国电解铝生产的主力槽型,某公司500 kA预焙电解槽由于母线配置、生产管理和工艺技术条件控制方面尚未成熟,电解槽运行稳定性差,易出现电压摆动、针振等现象,电解槽效率低、电耗高。经过对电解质温度、铝水平、分子比等技术条件的优化,电解槽保持了合理的过热度,建立了规整的炉膛,同时规范电解工序关键作业质量,减少人为因素对电解槽运行的干扰,增强电解槽的自适应控制,电解槽运行的稳定性和各项经济技术指标得到了提高。     

180kA低电压节能电解槽建立炉膛的工艺实践

针对低电压生产技术特点,结合生产实际,分析查找影响炉膛形状的因素,通过电解槽焙烧启动、初期工艺技术条件控制以及正常生产过程中的工艺条件、技术条件和操作管理优化,建立了180kA低电压节能电解槽规整、合理的炉膛,保持了电解槽的平稳、高效生产。     

对200KA预焙槽噪声值的探讨

通过生产实践,分析了引起200KA预焙电解槽噪声值偏大的原因,提出更换阳极、调整极距时、工艺参数调整、铝水平过低、炉膛不规整、炉底有大量的沉淀和结壳等引起噪声值偏大,提出了相应的处理措施和预防方法,有效地解决了电解槽噪声值偏大、达到了平稳生产、提高电流效率的目的。     

80kA上插棒式自焙铝电解槽熔体中电磁力场的计算与分析

介绍了铝电解槽中电场、磁场和电磁力场的计算模型及计算程序，结合我国自焙阳极铝电解工业实践，分析了铝液中各点的电磁力，并用计算机绘制了电解槽中电流分布、磁场和电磁力场图，为工业铝电解槽的设计和炉膛内形的优化提供了参考。     

硼化钛涂层阴极铝电解槽的生产试验考核

由于研究成功一种较廉价的,适于用石墨化炉生产硼化钛粉的方法,为硼化钛阴极涂层的工业试验提供了条件,并在9台75kA侧插铝电解槽上试验成功。试验证明,电解槽避免了剧烈膨胀和变形,运行平稳,易于操作维护,有利于防止早期破损;试验槽电流效率提高1.44％;节电175～211kWh/t铝;炉膛规整,减轻了工人的劳动强度。根据试验情况预计试验槽寿命可延长2～3年。试验结果还表明,该项技术已趋于成熟。     

提高电解槽寿命的途径探讨

铝电解槽的槽寿命受多方面因素的影响,直接影响电解铝企业的技术经济指标。本论文对影响铝电解槽槽寿命的因素进行了分析,对提高铝电解槽槽寿命的措施进行了探讨。在实际生产过程中选择合适的电解槽内衬材料、优化电解槽焙烧启动工艺,加强电解槽运行期间的管理水平,使槽膛形成稳定结壳,保持电解槽的三场稳定,是获得长寿命电解槽的关键。     

135kA预焙阳极电解槽延长槽寿命的生产实践

根据135kA预焙阳极电解槽的生产实践，提出了采用合理的焙烧方法，控制135kA预焙槽长期低温平稳运行、小炉膛生产的措施，在电流效率提高的同时达到延长槽寿命的目标。     

手机镜片注射模设计与制造

手机镜片产品的注射成形较为困难,主要是其注射模具的设计与制造要求较高.经分析认为,模具的浇注系统要选择好浇口位置,浇口形式采用扇形浇口,其尺寸应与产品的有关尺寸相吻合,以保证后续工序的切断加工.应重视排溢系统的设计,不仅在塑件的四周设计4条排气槽,同时,还利用6个冷料穴作冷料、排气、推出塑件用.模具采用三模板结构,特别增加了加固杆设计,以防止模板受压变形.镜片注射模的成形表面质量很重要,应该做好型腔的镜面抛光,关键要注意合理应用电火花加工工艺,选择合适的粗、精加工电极材料,不得使用手工抛光工艺.     

Hybrid control of graphite cast iron structure by partial melt treatment process

The Modified Inmould Process, which forms a cast iron-graphite hybrid alloy with a spheroidal/flake graphite structure (SG/FG), has been developed by the author.^1-3 Though this process can easily control the transitional structure of SG/FG, there are some mild restrictions caused by rapid collision during the mixing of molten metals in the mould on pouring. In this study, a new experimental process was designed to solve this difficulty. The plate-like mould cavity was separated into a reaction chamber (RC) and a product cavity by a thin dam. An alloy of FeSiMg for spheroidization of base molten metal was prepared in the reaction chamber. Molten metal was poured up from the bottom of the product cavity and a part of it flowed over the dam into the reaction chamber. After being spheroidized in the reaction chamber, spheroidal graphite (SG) iron melt flowed backward into the product cavity. The density of SG molten iron with a higher carbon equivalent value is generally lower than that of flake graphite (FG) molten metal. Thus SG molten metal moved into the upper end of the product cavity by replacement of the base metal, while the base metal remained stationary at the lower end of the cavity. As a result of the phenomena of flow, movement and replacement between mutual melts, a SG/FG transitional layer structure was formed, downward, throughout the cast product.     

具有规则孔型多孔材料的结构设计方法研究

主要研究规则孔型泡沫金属的结构设计方法，利用三维造型软件Unigraphics，对泡沫金属的结构进行预设计，研究设计出了四种不同的泡沫结构，并详细说明了金刚石泡沫结构的设计方法并分析了其结构特性，具有规则孔型的多孔材料其各项结构参数可调可控，可以最大限度地发挥其使用潜能，获得理想的性能。     

挤压凹模型腔轮廓的合理设计

挤压凹模型腔轮廓形状不同，其挤压力和所消耗的能量也不同。介绍一种力能消耗最少的凹模型腔设计方法。并将其力能消耗与楔形凹模作了比较。     

挤压凹模型腔轮廓的合理设计

挤压凹模型腔轮廓形状不同,其挤压力和所消耗的能量也不同。介绍一种力能消耗最少的凹模型腔设计方法,并将其力能消耗与楔形凹模作了比较。     

An experimental and theoretical investigation of the influence of stress state on cavitation during hot working

The effect of stress triaxiality on cavity growth during necking in the hot tension test was investigated and quantified. Experimentally, Ti–6Al–4V specimens deformed over a range of temperatures and strain rates developed necks of different sharpness and thus of varying levels of the ratio of hydrostatic to effective stress. The magnitude of these stresses was calculated using the classical work of Bridgman. Metallographic examination revealed that the average cavity size, cavity population, and cavity volume fraction were higher in the central region of each specimen as compared to that in the edge region. An analytical model was developed to separate the effects of cavity nucleation and coalescence from the apparent cavity growth rate and thus to determine the individual cavity growth rate at the two locations. The ratio of the cavity growth rate at the center of the specimen to that of the edge was correlated to the stress state (i.e., ratio of mean to effective stress) and compared to predictions derived from the work of Rice and Tracey and of Pilling and Ridley. These comparisons demonstrated that model predictions based on the Pilling-and-Ridley work provided good agreement with observations at low levels of hydrostatic stress, while the Rice-and-Tracey approach was better at higher levels. In addition, it was established that the analysis could be applied over a wider range of processing and material parameters than that originally assumed by Pilling and Ridley and Rice and Tracey.     

基于ANSYS的阶梯式斜端面组合凹模CAE分析

根据结构等强度优化理论,利用拉美公式优化得出凹模各层尺寸及层间过盈量,得出平端面组合凹模的优化结构;分析了端面倾角和阶梯高度以及两者共同作用时组合凹模应力状况,并拟合出组合凹模的最大等效应力与阶梯高度和端面倾角的函数关系。结果表明,在其他条件相同的情况下,阶梯式斜端面组合凹模具有更高强度。     

GMM微泵柔性铰链输出薄膜的结构设计与优化

由于超磁致伸缩高频微泵的普通输出杆与泵腔内壁频繁摩擦产生的损耗,影响泵腔的密封性,从而导致油液泄漏。为解决这一问题,提出一种复合型柔性铰链薄膜取代普通输出杆,并对各种柔性铰链薄膜进行有限元建模及分析,由仿真结果和理论分析得出:该复合型柔性铰链薄膜转动能力强,回转精度高,结构尺寸小,运动灵敏度高,从而减小柔性铰链薄膜与泵腔内壁的摩擦,为以后GMM微泵的设计提供理论基础。