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从固态和液态两个方面论述了含银废料的来源。针对不同来源的含银废料,总结了常用银的回收技术包括电解法、沉淀法、还原法、吸附法,并且指出了废料中银回收技术的发展方向应转向对高效吸附回收收法的研究。 相似文献
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科技的快速发展与爬壁机器人技术的应用需求使得爬壁机器人获得广泛关注。吸附方法作为爬壁机器人稳定吸附、敏捷运动、提升载荷的关键技术模块,对于提升爬壁机器人的整体性能至关重要,同时吸附方法的改进与提升能够进一步促进爬壁机器人的小型化和轻量化。对爬壁机器人现有吸附方法进行了分析和总结,提出并分析了爬壁机器人吸附方式关键技术,包括吸附方式与运动方式的权衡、关键零部件定制化设计、理论分析及仿真分析支撑下的优化设计、新材料的研发与制备工艺流程简化,对爬壁机器人吸附方法小型化、轻量化、大载荷的发展趋势做出展望。 相似文献
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Na2SO4溶液中磷酸环己胺的缓蚀机理及其吸附与脱附行为 总被引:10,自引:1,他引:10
应用极化曲线和交流阻抗技术研究了磷酸环己胺在Na2OS4溶液中的缓蚀机理及其吸附与脱附行为。结果表明,磷酸环己胺是一种负催化效应作用机理的阳极型缓蚀剂。它在铁电极上的吸附等温式符合Temkin模型。由于缓蚀剂的吸附与脱附作用,其阴极极化曲线存在着氧扩散极限电流区,强吸附区和Tefel线性区,而阳极极化曲线存在着Tafek线性区,脱附区和无缓蚀区。 相似文献
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论述用活性炭纤维吸附-催化转化制稀盐酸法处理含氯废气的可行性。通过小型试验探讨废气流量,CF循环对吸附-催化转化效率的影响,解吸方法对生产稀盐酸浓度的影响。最后现场试验证明该法技术上是可行的。 相似文献
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在化工生产过程中,酚类化合物的应用范围十分广泛,是一种非常重要的化工原料及中间体。其工艺过程中产生的含酚污水来源广、污染性强、降解难度大,因此提升含酚污水处理技术显得尤为重要。在含酚污水处理中,吸附法是最常见且简单高效的一种方法,其关键是对吸附材料的合理选择。金属有机框架材料是近年来迅速发展的一种配位聚合物,是除沸石和碳纳米管之外的一种新型多孔材料,在催化、储能及分离中具有良好的应用效果。对金属有机框架材料吸附处理含酚污水的研究进展进行了综述,总结对比了金属有机框架材料的类型、结构和制备方法,进一步阐明了其对含酚污水的吸附机制及影响该吸附过程的因素,并对金属有机框架材料在吸附性能方面的改进方向与应用前景做了展望。 相似文献
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从技术、经济的角度分析了富氧空气在密闭鼓风炉生产中的应用,对深冷法和变压吸附制氧技术进行了对比。 相似文献
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炭素工业焙烧炉烟气污染防治对策的探讨 总被引:8,自引:1,他引:7
分析焙烧炉烟气特征,综述各种焙烧炉烟气的治理技术及实际运行净化效果。提出密闭式焙烧炉烟气净化措施应优先采用全蒸发冷却塔加电捕焦油器,氧化铝吸附干法净化技术是铝电解阳极焙烧炉烟气的最佳治理技术。 相似文献
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吸附法处理工业废水研究最新进展 总被引:4,自引:0,他引:4
综述近年来吸附法处理工业废水的新技术.主要包括天然材料、改性材料的吸附,生物吸附,硅微囊技术和纳米技术等.并指出吸附法处理工业废水还应该研究的问题. 相似文献
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氧化物/氧化物陶瓷基复合材料的增强体和基体均由氧化物构成,不存在氧化问题,是长寿命高可靠性构件的理想选材,可在1000~1300℃的高温环镜中可长期使用。本文借鉴树脂基复合材料单向纤维湿法预浸料制备工艺,通过配置氧化铝粉体料浆在缠绕式湿法预浸机上制备了单向氧化铝纤维预浸料,然后预浸料经铺层模压和高温热处理获得了氧化铝纤维增强氧化铝陶瓷基复合材料,同时对复合材料性能进行了表征。结果表明,氧化铝粉体料浆的固含量在50vol%,料浆溶剂中水和丙三醇的比例为3:1,纤维的走丝速度为6m/min,滚筒平行进度为0.5mm时可获得无缝隙,无纤维重叠、表面平整光滑的预浸料。通过预浸料铺层热压成型制备的复合材料拉伸强度高达208.2MPa,弯曲强度为386.7MPa。和料浆涂刷二维纤维布工艺相比,力学性能大幅度提高,且预浸料工艺具有易存储、操作简单、适于工业化生产等优势。 相似文献
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S. Ma W.Q. Quek Q.F. Li Y.F. Zhang J.Y.H. Fuh L. Lu 《Journal of Materials Processing Technology》2009,209(10):4711-4715
Alumina (Al2O3) specimens were made via powder injection moulding and then sintered, respectively, at three different temperatures, 1800 °C, 1850 °C and 1900 °C, for 30 min in a vacuum condition to achieve a desirable translucent level. The Al2O3 samples with different transparency were fabricated. The sintered polycrystalline alumina samples with desirable and undesirable transparency were characterized using an X-ray diffractometer (XRD) and a scanning electron microscope (SEM) attached with an energy dispersive X-ray microanalyzer (EDX). The relationship between the degree of transparency and the microstructure was investigated. It was found that the undesirable transparency was due to the presence of second phase along the grain boundaries, porosity and the range of pore sizes. Other properties of the samples, such as density, porosity, and Vickers hardness, were also measured. The optimum sintering temperature and time, that is 1850 °C for 30 min, were given for the fabrication of translucent alumina to achieve the highest density and minimum porosity. 相似文献
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通过对世界主要铝业公司工艺技术指标、装备水平的论述,指出我国近年来所建的氧化铝厂技术装备已达到当今世界先进水平,同时为进一步研究我国氧化铝厂技术发展,了解国内外技术,进行了有益的尝试。 相似文献
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Anh-Hoa Bui Hyun-Mo Ha In-Sang Chung Hae-Geon Lee 《Metals and Materials International》2005,11(4):319-326
A dissolution experiment of alumina in mold flux for the continuoss casting of steel was conducted using the rotating cylinder
method at 1550 °C. The weight loss of the rod, the initial dipping area, and the immersion time were measured to determine
the dissolution rate of Al2O3. It was concluded that the dissolution rate decreased with increasing Al2O3 content, but increased to a great extent when the solid phase of 2CaO·SiO2 existed together with the liquid in the molten flux. The dissolution rate was found to be linearly proportional to the concentration
driving force and the viscosity, [(mass%Al2O3)s-(mass%Al2O3)b]η−0.988. The physical erosion of the rod surface by the solid 2CaO·SiO2 dispersed in the liquid was attributed to fast alumina dissolution. An intermediate compound of CaO·2Al2O3 was observed on the interface of Al2O3 rods after the dissolution experiment. In addition, the dissolution of alumina in industrial mold fluxes has been examined. 相似文献
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《Acta Materialia》2007,55(6):1965-1974
The formation of regular patterns is a common feature of many solidification processes involving cast materials. We describe here how regular patterns can be obtained in porous alumina by controlling the freezing of ceramic slurries followed by subsequent ice sublimation and sintering, leading to multilayered porous alumina structures with homogeneous and well-defined architecture. We discuss the relationships between the experimental results, the physics of ice, and the interaction between inert particles and the solidification front during directional freezing. The anisotropic interface kinetics of ice leads to numerous specific morphological features in the structure. The structures obtained here could have numerous applications, including ceramic filters and biomaterials, and could be the basis for dense multilayered composites after infiltration with a selected second phase. 相似文献