共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
随着企业的发展,实现企业信息化管理,提升管理水平,进一步挖掘企业的潜在能力,已成为企业的主要工作目标,杭钢2002年11月启动ERP信息工程,2004年2月顺利上线,运行ERP至现在,设备管理系统已经初步建成了全公司设备管理信息平台,基本实现了设备管理的物流、资金流、信息流三流合一,实现了整个集团公司设备系统的信息共享,实现了业务信息传递无纸化,提高了工作效率。 相似文献
3.
4.
针对轧机润滑系统存在的问题进行了分析,通过润滑系统的改造,延长了设备的使用寿命,降低了工人的劳动强度,节约了成本,创造了良好的经济效益。 相似文献
5.
马钢第一炼铁厂应用DZ─80测振仪对喷煤车间的2台风机进行状态监测,根据运行状态趋势图确定检修时间,实行预知维修,延长了检修周期,节约了维修费用。并通过数据分析,找出了设备存在的问题,进行了改进,改善了风机技术性能,提高了风机运行的可靠性。 相似文献
6.
胡德军 《冶金设备管理与维修》2010,(4):42-43
分析了板坯连铸机输送辊道频频损坏的原因,通过改进轴承座安装方式,防止辊子轴承座在辊道底座上移位,保证了辊子中心线垂直于铸流中心线,从而防止了铸坯跑偏。将悬挂式减速机改为底座固定式,提高了减速机的稳定性,选用十字轴万向联轴器连接减速机和辊子,吸收冲击载荷,有效地解决了问题。 相似文献
7.
8.
由于经济危机的影响,美国个人主义消费的时代已经结束,节俭成了新时尚。现今的美国人崇尚节俭,减少消费,比过去更具群体观念;但是,美国人也因此变得贫穷了,愤怒了,胆小了。 相似文献
9.
对焙烧多功能天车卸料系统加装筛分设备,实现在卸料的同时对填充料进行自动筛分,分离出不符合焙烧工艺的大块填充料。满足焙烧工艺需要的同时,扩充了多功能天车的功能,大大降低了生产成本和操作工的劳动强度,提高了工作效率,改善了车间的生产环境,达到了节能降本的目的。 相似文献
10.
11.
Muang-sangop Seniwongse 《Canadian Metallurgical Quarterly》2010,16(4):164-169
This paper presents comprehensive and practical engineering review (not mathematics or computer science paper) of the observed behavior of the two types of slabs that have been used for the bottom floor slabs, at grade and underground, of buildings in the United States and overseas. The typical design of the slab-on-grade (SOG) built in the United States is described. The design requires only nominal reinforcing steel, but modern day design also requires ground preparation and improvement as necessary, including underslab perforated drainage pipe network embedded in the granular subbase, riser pipes, and a series of pumps. Sealing at all slab isolation joints and waterproofing membrane or water barrier system are provided for water tightness. The framed slab is supported directly on the building framing and on the building foundation. The design can accommodate the soil and underground water pressure and in itself is watertight as the slab is cast monolithically with the structural walls and footings. The behavior of the SOG depends so much on the behavior (soil properties) of the soil strata on which the slab is resting on. It is sensitive to the variation of the soil conditions at and around building foundations, leading to uneven bumpy and cracked slab and leaking basement. These were demonstrated in the report of short- and long-term performances of various projects in Thailand and United States in the past 25 years. The paper refers to various analysis and design techniques that may be used to improve the design of both the SOG and the framed slab for serviceability and economy. It is concluded that both types of slabs may be selected to suit the functions and serviceability requirements of the buildings. The SOG requires less concrete and reinforcement than those for the framed slab counterpart, but when all other factors are considered including additional underslab drainage and pump system, operating, and long-term performance and maintenance, the overall costs of both slabs may not be far apart, yet the performance and integrity of the framed slab will certainly be superior. 相似文献
12.
不同市场条件下金属露天矿分期方案动态优化有关于金属露天矿分期方案动态优化的整体方案的设计与实施,是结合采选联合优化的一部分内容,针对地下采选一体化实现的露天金属矿采选联合优化,露天金属矿采选联合优化也是与金属露天矿分期方案动态优化相关,对于采选联合优化的选矿过程都是存有金属露天矿分期方案动态优化的内容,这就需要施工人员和设计者在涉及到井下的内部转化以及其他金属露天矿分期方案动态优化部分的过程中能够对于一些采选联合优化的内涵做出详尽的了解和分析。比如地下采矿中通常采用一体化设计,但是这种设计的缺点就是难以进行露天金属矿采选联合优化,但是对于矿山开展的试验性研究工作还是有利的,能够实现按空间位置的一体化是采选联合优化的内涵及发展历程的关键。 相似文献
13.
14.
15.
Sheng-hong Chen Ming-yi Xu Isam Shahrour Peter Egger 《Canadian Metallurgical Quarterly》2003,129(11):977-986
This paper presents the use of the trial load method and the block element method with elastoviscoplastic discontinuities for analysis of arch dams. The arch dam is considered as an arch-cantilever system and the foundation as a block element system. With the displacement compatibility condition at the contact surface of the dam and the foundation (including abutment), the governing equations of the arch dam and foundation are established. These methods are used for the analysis of the double curvature arch dam with complex geology conditions of the Xiaowan Hydroelectric Project in China. The deformation and stress states in both the dam body and the foundation are determined. Furthermore, the stability safety factors of the foundation and the abutment are calculated at the same time, which allows for an optimal design of the arch dam considering the strength, the deformation and the stability of the dam and foundation. 相似文献
16.
17.
Renata Kotynia Radoslaw Walendziak Iwan Stoecklin Urs Meier 《Canadian Metallurgical Quarterly》2011,15(2):168-180
This paper presents the test results of reinforced concrete slabs strengthened with prestressed and gradually anchored carbon fiber–reinforced polymer (CFRP) strips under monotonic and cyclic loading. To take full advantage of the externally bonded CFRP technique, it is beneficial to apply the laminates in a prestressed state, which relieves the stress in the steel reinforcement and reduces crack widths and deflection. The aim of the monotonic tests was to determine the strengthening efficiency of the new prestressing technique and to investigate serviceability and ultimate states. The cyclic tests were performed to identify the fatigue behavior of the strengthened slabs and to investigate the influence of long-term cyclic loading and elevated temperature on the bond properties of the prestressed CFRP laminates and the ductility and flexural strength of the strengthened slabs. A nonlinear analytical model of reinforced concrete members strengthened with passive and prestressed CFRP strips under static loading is proposed in the paper. A comparison of the experimental and predicted results reveals an excellent agreement in the full range of loading. 相似文献
18.
Robin Fell Chi Fai Wan John Cyganiewicz Mark Foster 《Canadian Metallurgical Quarterly》2003,129(4):307-314
A method is presented for the approximate estimation of the time for progression of internal erosion and piping, and development of a breach leading to failure in embankment dams and their foundations. The method accounts for the nature of the soils in the dam core, the foundation, and the materials in the downstream zone of the dam.?Guidance is also provided on the detectability of internal erosion and piping, taking account of the mechanism of initiation, continuation, and progression to form a breach, for internal erosion and piping in the embankment, the foundation and from the embankment to foundation.?It is shown that in many dams which have poor internal erosion and seepage control and are constructed mainly of earthfill, the time for potential development of piping is short, and for these dams continuous monitoring of seepage or surveillance would be needed to detect the piping in time to give warning of possible failure, and to give time to attempt intervention to prevent the failure. 相似文献
19.
明确物相变化是剖析钛渣酸解机理和改进酸解工艺的关键点之一。综合应用化学分析、X射线衍射(XRD)分析、矿物解离分析以及扫描电镜形貌分析对某74钛渣酸解过程中主要物相的含量、形貌变化以及Ti、Si两种元素的含量及赋存变化进行了研究。结果表明:钛渣主要由黑钛石和辉石组成,酸解过程中黑钛石含量逐渐减小,辉石含量逐渐增加;反应过程中,酸主要以扩散的形式渗透到黑钛石颗粒表面及内部孔缝,从而分解黑钛石;酸解前后,辉石形貌无明显变化,但随反应深入,其解离度逐步提高;钛渣中Ti元素主要赋存于黑钛石中,Si元素主要赋存于辉石中,部分赋存于黑钛石和黑钛石-辉石混合物中,反应过程中Ti元素主要由黑钛石向TiOSO4迁移,部分迁移至黑钛石-辉石混合物中;Si元素迁移并主要富集于辉石以及黑钛石-辉石混合物中。 相似文献