共查询到19条相似文献,搜索用时 948 毫秒
1.
介绍了Fe3Al金属间化合物过滤材料在洁净煤工业装置中的飞灰过滤器、310S合金滤芯在石油炼化S Zorb工艺中的反应器过滤器以及Hastelloy X合金滤芯在化工工艺活化炉过滤器中的应用情况,分析了金属过滤材料的耐温性、耐蚀性、抗热震性、可加工性和强度等性能。结果表明:在高温除尘介质过滤应用上,金属过滤材料比陶瓷材料具有更好的适应性和优越性。结合国家能源与环保产业发展战略与规划,预测了金属过滤材料将在金属与无机非金属复合过滤材料、高通量金属过滤膜材料等方向的突破与革新。 相似文献
2.
3.
4.
以?240 mm新型高强耐蚀合金铸锭为原料,经过开坯、拉拔、铺毡、烧结等工序制备出了金属滤材,系统研究了滤材的高温抗氧化性能、高温拉伸性能及过滤性能。结果表明:合金滤材在700℃为抗氧化级别,700℃以下具有良好的抗氧化性能;当温度由室温逐渐升高到650℃时,合金滤材的抗拉强度呈线性降低;合金伸长率在低于150℃时下降缓慢,150~450℃时下降迅速,而高于450℃时,伸长率下降趋势又显著减小;过滤风速为1.5 m/min及5.0 m/min时,新型高强耐蚀合金滤材对粒径大于0.5μm的粉尘的过滤效率均超过98%,出口粉尘浓度仅为0.5 mg/m~3,可完全满足冶金、化工、能源等领域对于大气污染物排放的标准。 相似文献
5.
6.
锂离子电池商用负极材料石墨比容量低,难以满足市场需求,金属有机骨架材料(metal-organic framework materials,MOFs)具有可调控的结构、较大的表面积和可调节的孔径,可用作下一代电化学储能器件,引起广泛研究。本文综述了金属(Fe、Co、Zn、Mn、Cu)基金属有机骨架及其衍生物的合成,重点介绍了以金属有机骨架材料为前驱体制备过渡金属氧化物(transition metal oxide,TMO)/C作为锂离子电池负极材料的研究进展,并对其发展方向进行了展望。 相似文献
7.
梅钢焦炉烟气采用固定床活性炭工艺脱硫,在实际运行过程中出现活性炭严重粉化,脱硫塔系统阻力增加,脱硫系统能耗成本升高等问题。对比分析新旧活性炭在粒度、强度和微观结构的差异,探索了运行温度、水洗程度对活性炭脱硫性能的影响。结果表明:当活性炭长径比小于1.5时,抗压强度较差;水洗不彻底会残留盐类物质,造成活性炭的碘吸附值、比表面积、脱硫值下降;脱硫系统运行温度过高,不利于活性炭物理吸附过程,影响了其脱硫性能。该研究为降低固定床活性炭粉化率提供了工艺优化方向。 相似文献
8.
9.
10.
11.
12.
13.
A. V. Yudin A. V. Kuznetsov I. V. Derevyanchenko É. A. Shumakher V. N. Khloponin R. Frantski 《Metallurgist》2007,51(9-10):541-544
Use of the injection equipment in the DVS system on electric steelmaking furnaces at the Moldavian Metallurgical Plant has shown that, other conditions being equal (consumption of oxygen and natural gas, composition of the charge materials), it is more effective than the DPP system for the bottom injection of inert gases into steelmaking baths. The system injects the energy carriers directly into the liquid metal. The results obtained from one DVS injection unit turned out to be better than those obtained from the simultaneous operation of three DPP units. 相似文献
14.
传统金属加工设备存在持续运行连贯性较差的缺陷,以此开展了基于机械制图一体化技术的金属加工设备运行设计。引入积木式机体安装方法,设计金属加工设备运行机体,设计设备加工金属过程,控制金属加工设备电气运行方式,设计设备固焊流程。提出对比实验,验证提出设备可提升金属加工设备运行的连贯性,更具备市场经济效益。 相似文献
15.
OBJECTIVE: To develop a filter utilizing mathematical theory to extract the skeletal patterns of trabecular bone. METHODS: Studies of morphology in the extraction of patterns of calcification in mammograms provided the theoretical framework. Using these studies as a basis, a morphological filter was applied to extract skeletal patterns from digital images of trabecular bone. Sequential images (subset) were combined in a structured fashion to create an aggregate (sumset) which compared with the original images, skeleton and line skeleton images. RESULTS: Binary images of the skeletal patterns in continuous, round and mesh-like forms were obtained from the original images by processing with the skeleton operation using a disc-shaped single structuring element. The line skeleton operation using line structuring elements with constant directions allowed the extraction of linear and discontinuous patterns. Both the skeleton and line skeleton operations extracted binary subset images which depicted skeletal patterns correlating with the operation sequence. CONCLUSIONS: Modification of the morphological filter enhanced the extraction of skeletal characteristics of trabecular bone. A morphological filter may be a useful adjunct in computer-aided structural analysis of bone. 相似文献
16.
针对不锈钢/碳钢复合板在平整轧制过程中极易出现不均匀延伸并导致板形翘曲的行为,建立了不锈钢/碳钢复合板平整轧制过程的有限元数值模拟模型,对已实现工业化批量生产的不锈钢/碳钢复合板平整轧制过程的不均匀变形行为及其可能导致的板形翘曲缺陷进行数值模拟研究。在此基础上,对比分析了均质板、非对称不锈钢/碳钢复合板以及对称不锈钢/碳钢/不锈钢复合板平整轧制过程板形的遗传与演变规律,发现仅非对称不锈钢/碳钢复合板在平整轧制过程中极易产生板形翘曲缺陷,同时对比分析了平整和常规轧制对非对称不锈钢/碳钢复合板轧后翘曲缺陷的影响。揭示了不锈钢/碳钢复合板厚向分层特征以及复合板尺寸参数、平整工艺和平整机设备参数等对其板形翘曲缺陷的影响规律,研究表明,对复合板尺寸参数而言,平整过后翘曲高度与厚度比呈正比。对于平整工艺而言,当等张力平整轧制时,平整过后翘曲高度与张力呈正比;当不等张力平整轧制时,前张力的变化对平整过后翘曲缺陷的影响较大;同时平整过后翘曲高度与轧辊和碳钢层表面摩擦因数呈反比。对平整设备参数而言,平整过后翘曲高度与碳钢层表面接触的轧辊辊径、入口侧防皱辊抬起高度以及不锈钢层表面接触轧辊偏向入口侧的距离均呈正比关系。最后,采用轧制试验对数值模拟结果进行了验证,证明了复合板平整轧制模型的准确性。基于上述研究结果,提出了相应的工艺对策,为金属复合板平整轧制过程的板形翘曲控制提供了理论依据。 相似文献
17.
Conclusions As the result of a theoretical and experimental investigation of the hydraulic and filtering characteristics of porous grid materials of grids with square cells analytical relationships were obtained for calculation of these parameters based on the geometric dimensions of the grids, the parameters of the porous grid material production operation, and the structural characteristics of the material.An increase in the number of layers of grid in the material leads to a decrease in the coefficient of permeability of the porous grid material. At the same time, as shown experimentally, the value of Kp is practically independent of the number of layers with N > 7.With an increase in the number of layers of grid in the packet and in the degree of its reduction in rolling the filtering characteristics of porous grid materials of grids with square cells improve. At the same time for any nominal fineness of filtration of the material there exists a certain combination of values of N and providing the minimum weight of a filter element of porous grid material with a specified nominal fineness of filtration of the liquid.Translated from Poroshkovaya Metallurgiya, No. 12(276), pp. 70–74, December, 1985. 相似文献
18.
19.
本文论述了硫脲铁浸法提金工艺的关键设备——提金吊车的工作原理和结构特点,自控系统,包括顺序控制和计算机控制装置的设计特点。 相似文献