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湿法炼锌中铁的行为、作用及控制 总被引:1,自引:0,他引:1
文章介绍了铁在焙烧过程中易生成铁酸锌的危害、浸出过程中与砷锑锗共沉的特性、电解过程中的危害;通过对锌湿法冶炼系统中除铁过程的改进,提高了电效,保证了产品质量。 相似文献
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《有色金属(冶炼部分)》1975,(2)
无产阶级文化大革命以来,在毛主席革命路线的指引下,在上级党委的正确领导下,我厂在资源综合利用、“三废”治理方面取得了一定的成绩。综合利用的产品品种和产量均有大幅度的上升,生产过程中的氯气危害得到了基本消除,并回收利用;火法脱砷的工艺不断改进,减轻了砷的危害,环境逐年有所改善。但是,砷害及铜、钛生产过程的污水,尚未找到更有效、更合适的处 相似文献
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本文通过对谐波产生的原因、谐波的危害及治理做一阐述,使大家对谐波的危害有一个深入的认识,并能够采取合适的方法来预防和消除谐波。 相似文献
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阳若宁 《工程设计与研究(长沙)》2003,(2):23-26
对变压器、整流设备等谐波的产生及其危害作了较全面的分析,并对其抑制提出了具体可行的办法。同时给出了应用实例,应用结果表明,三的倍数次谐波可得到有效抑制。 相似文献
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The financial losses resulting from various incidents on typical building construction sites are reported. Field data was collected on three sites over a period of nine months. Incidents were recorded by three observers on a daily basis including data on the cause of the event, the direct losses incurred and the contractors involved. The 658 incidents reported were analyzed to determine the general characteristics of incidents, the level of field control possible and the incident costs. Overall losses on the individual sites are compared while combined results for all three projects are examined. Particular attention is paid to safety‐related incidents. Limitations of the monitoring program are discussed. The results indicate that downgrading incidents are responsible for a substantial loss on construction projects, however, the observations show that most losses could be eliminated through up‐graded on‐site management. Recommendations are made for reducing the losses by improving such management functions as planning, scheduling, follow‐up, equipment maintenance and problem documentation. 相似文献
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本文阐述了激光热处理技术的技术在模具工业的应用概况,论述了该项技术在模具工业的研究和应用所带来的巨大经济效益,说明了激光热处理在模具钢上的研究方法及方向。 相似文献
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In this review the modern concepts on psychophysical mechanisms of hemispheric functional specialization of human visual perception are considered. The problems are discussed on three basic historical aspects: interhemispheric relations in patients with localized cerebral lesions, interhemispheric differences in the "Bisected Brain", and the functional asymmetry in the intact brain. The neuropsychological data on recognition of geometric figures, faces and objects, and also electrophysiological results on the event-related brain potentials are deliberated. Special attention is given to the own data of authors dedicated to importance role of the right hemisphere in the brain interhemispheric functional asymmetry in control subjects and alcoholics. Several problems on learning and influence of emotions on visuospatial recognition are discussed. The dichotomous approach to brain functional asymmetry are not shared, the hypothesis on intersupplementary cooperation in hemispheric specialization and interaction of the brain hemispheres are supported. 相似文献
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在钨粉中掺入硅和钠元素,在W-Ni-Fe合金混合料中添加纯硅粉,通过实验得出硅和钠对高比重钨合金的力学性能会产生不利的影响。硅和钠形成了氯化物夹杂,在夹杂物周围存在孔隙。文中分析了夹杂物周围孔隙形成的机制,还根据夹杂物的成分,分析了Al、Mg、Ca、Mn、Ti等金属元素对合金的影响。 相似文献
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This paper focuses on designing the optimal layout of measurements for parameter identification problems in geomechanics, which are usually based on in situ displacements. The existence, uniqueness, and stability of the solution from the parameter identification process are thoroughly discussed. Based on these understandings of the problem, two algorithms are proposed as a means of automatically generating the optimal measurements. The validity of these algorithms is first proved by some academic examples, then these algorithms are applied to the Munich subway tunnel project. Good results are observed there. 相似文献