提高起重机外购件入厂合格率

制造企业从企业外部购进大量的原材料和零部件,这些外购件的质量对企业的产品质量有着直接的影响.对于大量使用外购件的机械制造企业,提高对外购件的检验合格率就显得尤其重要.QC小组活动在开发智慧、提高质量、降低消耗、增加效益等方面,发挥着越来越大的作用,QC小组活动的开展与实施有效地起到了控制外购件入厂合格率,提高员工工作素养的积极作用.     

Exergoeconomic and exergoenvironmental evaluation of power plants including CO2 capture

CO₂ capture from power plants, combined with CO₂ storage, is a potential means for limiting the impact of fossil fuel use on the climate. In this paper, three oxy-fuel plants with incorporated CO₂ capture are evaluated from an economic and environmental perspective. The oxy-fuel plants, a plant with chemical looping combustion with near 100% CO₂ capture and two advanced zero emission plants with 100% and 85% CO₂ capture are evaluated and compared to a similarly structured reference plant without CO₂ capture. To complete the comparison, the reference plant is also considered with CO₂ capture incorporating chemical absorption with monoethanolamine. Two exergy-based methods, the exergoeconomic and the exergoenvironmental analyses, are used to determine the cost-related and the environmental impacts of the plants, respectively, and to reveal options for improving their overall effectiveness.For the considered oxy-fuel plants, the investment cost is estimated to be almost double that of the reference plant, mainly due to the equipment used for oxygen production and CO₂ compression. Furthermore, the exergoeconomic analysis reveals an increase in the cost of electricity with respect to the reference plant by more than 20%, with the advanced zero emission plant with 85% CO₂ capture being the most economical choice. On the other hand, a life cycle assessment reveals a decrease in the environmental impact of the plants with CO₂ capture, due to the CO₂ and NO_x emission control. This leads to a reduction in the overall environmental impact of the plants by more than 20% with respect to the reference plant. The most environmentally friendly concept is the plant with chemical looping combustion.     

商业木片洗涤系统的应用

介绍了青山纸业股份有限公司木片洗涤系统的工艺流程及其设备特征.     

新闻纸生产中的一些问题及对策

本文是针对本公司PM8纸机的生产情况,对原材料和浆进行调研的一些情况总结,以及所采取的一些措施.     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

外购铁精矿的水力输送、再磨再选及扩大处理能力的技术改造

介绍了包头钢铁(集团)公司(包钢)选矿厂通过对外购铁精矿原料输送、再磨再选,扩大生产能力的改造,取得了改善环境,降低运输成本,提高精矿品位的效果。     

太钢外购矿粉的烧结性能试验

对太钢外购的哈默斯利粉矿（H．I）、库利诺亚宾精矿、辽宁朝阳精矿、河北涞源精矿进行了试验研究。实验室试验和工业试验均表明，H.I矿和库矿的烧结性能明显优于朝阳矿和涞源矿，且H．I矿的烧结综合性能指标是最好的。     

电力体制改革下的多虚拟电厂联合优化调度策略

虚拟电厂间通过签订双边合同进行交易,能够实现功率互补,提高合作双方的灵活性和经济性。考虑虚拟电厂运行约束及配电网安全约束条件,建立计及配电网线路开关重构的虚拟电厂优化调度模型,同时考虑多虚拟电厂之间的电量交易,建立合同电价优化定价策略。为了使模型可解,采用二阶锥规划,将复杂的非凸非线性问题转化为一个典型的混合整数二阶锥模型,极大地提高了求解效率。为了增强合作性,引入合作满意度的概念,使得制定的合同电价达到双方满意度均衡状态下最优。最后对实际算例进行测试,结果表明:多虚拟电厂联合调度能够有效缓解可再生能源出力波动造成的收益风险,提高整体收益;满意度概念的引入可以制定出令双方都有意向签订的最优合同电价;所采用的二阶锥模型提高了计算效率。     

运用质量管理法全面提升矿检水平

介绍了武汉钢铁股份有限公司质检人员根据实际情况,改进工作细节,提高入厂船运国内矿质量检查水平,为高炉顺行提供了有力保障。     

对降低武钢能源消耗费用的思考

分析了武钢能源消耗的现状及降低费用的必要性，提出了武钢现阶段降低能源消耗费用的综合措施。