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德兴铜矿三期工程建成后,将跨入世界特大型矿山行列.本文全面介绍了德兴铜矿三期工程从环境影响评价、设计与生产过程中所采取的环保措施,并对这些措施的目的、意义及其实施后的效果进行了较为详尽的评述. 相似文献
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本文是作者参加日中双方专家为完成《德兴铜矿废水处理开发调查》项目,而在德兴铜矿所做的现场调查和试验研究.文中论述的酸、碱废水情况及处理工艺,不仅对德兴铜矿三期工程的废水处理设计有指导意义,而且对其他铜矿山也有参考价值. 相似文献
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德兴铜矿三期工程供电设计采用超高压供电深入负荷中心和减少降压级次进行配电,并选用SF_θ组合电器,取得了明显的节电效果。 相似文献
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德兴铜矿三期铜精矿生产线上的20世纪90年代初期投运的45m^2折带式过滤机现已不能满足矿山生产需求,江铜集团为此引进了3台康明克斯(北京)设备有限公司APN板框式压滤机。日前,第3台在德兴铜矿精尾综合厂三期铜精矿生产线开始安装,预计2011年3月底安装完工并试生产。该压滤机长9.5m,宽2.6m,高约5m,总重75t。压滤机的中心部位共安装了39块压滤板, 相似文献
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宝钢三期工程的投资体制和经济环境与宝钢一、二期工程有很大不同。在投资体制上,宝钢一、二期工程的建设资金由国家技款或银行贷款,宝钢三期工程的建设资金由企业自筹。在经济环境上,宝钢一、二期工程是在计划经济条件下进行建设的,而宝钢三期工程建设一开始,就面临从计划经济转向市场经济。面对这一新形势、新情况,宝钢在借鉴一、二期工程控制投资、质量与工期基本经验的基础L,结合三期工程的特点.以高质量、高速度、高效益建成三期工程为目标,努力开拓创新,在控制三期工程投资、质量与工期方面取得了新的进展和成果。一、控制… 相似文献
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2012年德兴铜矿三期硫精矿脱水系统过滤物料由标准硫精矿改为高品位硫精矿,由于粒级、比重的改变,系统流程不畅,生产不能正常进行。通过对不满足生产的设备现状和流程环节进行改造,实现系统处理高硫时正常生产。 相似文献
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合同管理在项目管理中的地位和作用 总被引:3,自引:0,他引:3
在现代建筑工程项目管理中合同管理具有十分重要的地位,已成为与进度管理、质量管理、成本(投资)管理、信息管理等并列的一大管理职能。合同管理对项目的进度控制、质量管理、成本管理有总控制和总协调作用,是工程项目管理的核心和灵魂,这是由合同在社会主义市场经济条件下以及现代建筑管理工程中的独特作用所决定的。在国标清单计价规范实施之际,作为一名造价工程师更应该熟悉和了解合同管理的地位和重要性。 相似文献
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建设工程项目的投资控制是一项系统工程,应在项目决策阶段、设计阶段、施工招、投标和实施阶段对投资进行有效控制,集事前控制、事中控制、事后控制于一体。 相似文献
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安钢"系列阳光采购法"的创立与应用 总被引:5,自引:4,他引:1
安钢“系列阳光采购法”是物资供应处在原有的“邀请招标”基础上发展创新而成,包括“直接招标法”,“功能计价法”,“即时招标法”和“挂牌采购法”等八种,本文介绍了这些方法的基本内容,创新与发展的过程及其应用。 相似文献
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The contractors’ pricing for contract risks in tenders determines how much the employers have to pay for the risk transfer. Therefore, understanding the factors influencing the contractors’ pricing for contract risks is crucial for employers to optimize the cost effectiveness of risk allocation in contracts. This study investigates the factors that contractors perceive to be important when they are pricing “time-related” contract risks. A questionnaire survey was designed for collecting data from building contractors currently operating in Hong Kong. Contractors were not only required to rate the importance of individual factors, but also to state the cost implications when compared with normal pricing in the absence of the concerned factor. The findings reveal that a single factor may have two-sided implications (both inflating and deflating the prices) for which they can be in unequal scales. These scales vary according to the contractor size and the reasons of the differences are investigated. The findings also assist employers in formulating a cost effective contract strategy by equipping them with the necessary knowledge. 相似文献
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A problem that always annoys building employers and their consultants when drafting building contracts is whether it is more cost efficient to retain certain risks with themselves or to transfer the same to contractors, and it has long been a difficulty to accurately estimate the cost for transferring risks to the other contract party. It is a very common market practice to remove contractors’ entitlement to extension of time due to inclement weather, and in view of the significant impacts that inclement weather posed on construction progress, it would be helpful to assess the associated costs for such risk allocation exercises in order to ensure that it is a cost-effective transaction. The costs for these potential weather-caused delays are priced by contractors in their returned tenders. This risk-pricing behavior is affected by the contractor’s risk perception and risk attitude. However, merely working out contractors’ risk perception and risk attitude patterns is inadequate, as they may vary in accordance with different organizational sizes and project backgrounds. Therefore, further studies should be carried out on the implications of project information, such as project value and contract period, on different-sized contractors’ risk behaviors. In this research, a questionnaire survey was conducted to investigate the weather-risk-pricing behavioral patterns of various-sized contractors under different given project scenarios. The survey revealed that the impacts of project value and contract period (and, thus, the intensity of work and scale of exposure to weather risk) were significant on contractors’ risk behaviors, and these impacts varied in accordance with different organizational sizes. The medium-sized contractors’ pricing behaviors were rather constant under different project values and contract periods, while both small and large contractors behaved differently when the intensity of work and scale of risk exposure varied. Despite the fact that contractors of various sizes behaved differently in some given scenarios, the number of days of delaying cost allowed by them in returned tenders were generally less than the actual number of days of inclement weather affecting work. 相似文献
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皮带运输机变频调速控制的应用实践 总被引:1,自引:0,他引:1
本文用实例说明用变频调速的主要构成 ,可实现高质量的自动控制 ,以及变频调速在节能、降低检修成本等方面的优越性及良好的投资回报。 相似文献
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工程变更结算,是承发包双方确定投资增减的一项关键工作,它直接影响投资的控制目标。只有加强工程变更管理,严格控制工程变更,采用科学的方法,本着合同优先,公平、合理,兼顾工程综合效益的原则,才能做好工程量清单模式下的工程变更结算工作。 相似文献