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现行铸造生铁价格,按生铁中含锰量分为三组。适当添加少量锰矿,提高生铁质量等级,可获得几十万或一百多万元的年收益;同时,生铁中含锰量提高,有利于脱硫,提高炉渣的流动性,便于高炉操作。根据南昌钢铁厂炼铁分厂实际,在高炉中添加少量锰矿,在技术上和经济上是十分有益的。 一、产品和原燃料情况 1.生铁中锰的含量要求及价格差如表1所示。 从表1可见,生铁中锰含量越高,价格越高。 2.原燃料情况 进厂的原燃料中,除七宝山矿(含锰1.6%)和黄梅矿(含锰1.48%)有较高的含锰量外,其它几种矿,澳矿(含锰0.06%),姑山矿(含锰0.12%)、文竹矿(含锰0.08%),海南矿(含锰0.07%)均含微量的锰。因此,生铁中含锰量主要是七宝山矿和黄梅矿配入的数量。一般七宝山矿(或黄梅矿)配 相似文献
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<正>生铁冶炼的最终产品有主产品生铁及副产品高炉煤气和水渣,在生铁成本核算中,高炉煤气和水渣通常作为生铁成本的减项冲减生铁成本。然而在实际生产中由于生铁生产规模一般都比较庞大,以铁矿为主的原材料消耗量巨大、材料库存量也大,相应材料消耗的统计数据易出现误差,直接影响了生铁成本核算的准确性。 相似文献
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新设备、新工艺、新技术的投入使用,可以提高生产力、降低设备养护成本、减轻维修强度,提高维修水平和设备养护质量。新设备和重载铁路传统维护经验相结合是需要研究的新课题。总结QJY-A道岔缺口监测系统在生产中的应用经验,为日后的设备维护提供参考。 相似文献
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开发攀西钒钛磁铁矿资源,提炼钒、钛、铁3种金属的新工艺流程正在攀钢处于试生产阶段.新工艺流程如正式投入生产,建设多大规模的钢铁化工联合企业最为经济合理,将是国家和冶金经济工作者所关心的一个问题. 相似文献
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一、国际焦炭市场基本情况
据有关资料统计,到2000年,全世界8亿t/年左右的钢产量中,65%~70%将由生铁生产,而生铁中至少有90%以上为使用焦炭的高炉生产.因此,在今后相当长的时间内世界钢铁工业对焦炭的需求量仍十分可观. 相似文献
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贯通测量,尤其是大型巷道贯通测量是矿山测量工作的一项重要工作,贯通工程质量的好坏,直接关系到整个矿井的建设、生产和经济效益,为了加快矿井的建设速度、缩短建井周期、保证正常的生产接替和提高矿井产量,会采用对掘的掘进方法,这样就会出现两巷长距离巷道贯通测量,所以两井间贯通测量就成为了矿井生产中必不可少的一项工作。 相似文献
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We present an econometrically feasible model that uses the information contained in the innovation profile of each firm to test for the existence of complementarity among production and innovation strategies. Our approach is able to distinguish between complementarity and correlation induced by unobserved heterogeneity. We apply the model to analyze the Spanish ceramic tile industry where the adoption of the single firing furnace in the 1980's facilitated the introduction of new product designs as well as opening new ways of organizing production. Our econometric results show that there is significant complementarity between product and process innovation. Small firms tend to be more innovative overall. 相似文献
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Analysis of a general Markovian two-stage continuous-flow production system with a finite buffer 总被引:2,自引:1,他引:1
Fluid flow models are used in the performance evaluation of production, computer, and telecommunication systems. In order to develop a methodology to analyze general Markovian continuous material flow production systems with two processing stages with an intermediate finite buffer, a general single-buffer fluid flow system is modelled as a continuous time, continuous-discrete state space stochastic process and the steady-state distribution is determined. Various performance measures such as the production rate and the expected buffer level are determined from the steady-state distributions. The flexibility of this methodology allows analysis of a wide range of models by specifying only the transition rates and the flow rates associated with the discrete states of each stage. Therefore, the method is proposed as a tool for performance evaluation of general Markovian continuous-flow systems with a finite buffer. The solution methodology is illustrated by analyzing a production system where each machine has multiple up and down states associated with their quality characteristics. 相似文献
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For stochastic cash flows, probabilistic approaches to determine a complete distribution of payback period are very limited. The payback analysis based on the net present value (NPV) has several advantages. For annual cash flows, however, the NPV-based method does not provide a complete payback distribution. This article proposes a new technique, the equivalent cash flow decomposition (ECFD), which converts an annual cash flow into an equivalent subannual cash flow at a desired level of precision. The ECFD technique can be used in conjunction with any probabilistic cash flow technique. This article demonstrates that the ECFD technique overcomes the discontinuity limitation of the conventional NPV-based payback period method and generates a complete distribution of the payback period of annual cash flows. Examples indicate that the proposed method is robust with the accuracy comparable to Monte Carlo simulation. 相似文献
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井下作业是石油生产的一个重要组成部分,是油田生产单位正常运行的一个保障。井下作业是按照生产型单位的管理模式运行的,随着井口数的增加,作业任务加重,大量私有制的作业队涌现出来,国有的作业单位却出现了作业质量差等问题。运用层次分析法,建立了一套合理有效地评价体系,通过该评价体系,找出影响作业服务质量的主要问题,解决了这些主要问题,很好地提高作业服务质量,为油田生产创造更广更大的价值。 相似文献
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长庆油田数字化管理建设探索与实践 总被引:2,自引:0,他引:2
为了建立适应长庆油田快速发展的高效管理运行机制,2008年长庆油田提出了"油田数字化管理理念",开创了油田管理现代化的新局面。长庆油田数字化生产管理系统整体上可分为三大块:一是前端以基本生产单元过程控制为核心功能的生产管理系统。重点实现对单井、管线、站(库)等基本生产单元的过程控制和管理。二是中端以公司层面生产指挥调度、安全环保监控、应急抢险为核心功能的生产运行指挥系统。三是后端以油气藏管理、经营管理为核心功能的决策支撑系统。在生产工艺流程优化的基础上将数字化与劳动组织架构相结合,合理划分生产单元,按生产流程设置劳动组织架构,实现生产组织方式和劳动组织架构的深刻变革。把油气田数字化管理的重点由后端的决策支持向生产前端的过程控制延伸,最大限度的减轻员工劳动强度,提高工作效率和安防水平。 相似文献
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为了提高I-D SBS改性沥青的各项性能指标,以满足特种I-D SBS改性沥青的质量需求,利用中海油自产的重交沥青作为基质沥青原料,韩国LG501型号SBS为改性剂,对应的生产技术,对生产特种I-D SBS改性沥青中的质量控制技术进行了分析,结果表明,通过控制基质沥青、SBS等原辅材料的质量和生产过程工艺参数,能够生产出合格、稳定的特种I-D SBS改性沥青产品。 相似文献
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《Food Policy》2019
In theory, learning from past mistakes should result in adapted and improved development policy. However policy learning can be difficult to achieve, and the link between learning and policy change is neither direct nor immediate. In this study we look at learning in agro-industrial policy in Ghana, by tracing the interest in sugar production and tomato processing over six decades. Specifically we ask why four failed factories established in the early 1960s have continued to play central roles in both policy and public discourse. Using policy documents, academic material, and the popular press, we show that Ghana’s policy focus on sugar production and tomato processing has endured, despite the fact that the factories were misconceived, poorly sited, ill-equipped and poorly managed. Indeed, the political ideas that underpinned the establishment of these factories in the early days of independence can be seen in the current One District, One Factory policy. We suggest that it is their symbolic and political value, not their economic value, which keeps the discussion around these factories alive. Even when shut down, they are a physical manifestation of historic commitments by the state, and as such they guarantee the attention of politicians, and hold out hope of a next re-launch. Unfortunately as long as the factories continue to be incorporated into each new generation of agro-industrial policy, it is difficult for any alternatives to gain traction. This analysis highlights the very long overhang of bad decisions, particularly when they are associated with physical infrastructure. Learning from past mistakes will only happen if the short-term political cost of turning policy learning into policy action can be overcome. 相似文献