轧钢加热炉改造

针对轧钢加热炉加热能力不足,炉墙冒火,自动化控制水平落后的情况,对加热炉进行了改造,延长了加热炉的长度,更换了单蓄热式空气烧嘴,并对自动控制系统进行了升级改造,从而消除了炉墙冒火的现象,提高了加热能力和自动控制水平,降低了煤气消耗,取得了良好的经济效益。     

TRT顶压控制系统及其安全性的研究与优化

介绍了天钢1~#TRT顶压控制系统,对现有的顶压控制系统进行了分析,在原有差压调节模式的基础上增加了顶压调节模式,将实际操作改为差压调节与顶压调节两种互选模式,提高了系统的发电效率;对旁通阀组的控制进行了优化,优化后极大地提高了系统的安全性,保证了炉顶压力的稳定,延长了设备的使用寿命,产生了较高的经济效益。     

提高转炉护炉效果的实践

从转炉耐材的损害机理入手,分析了耐材的损耗机理,探讨了炉渣的优化机制,对炉渣的组成及渣料的使用进行优化,对溅渣的工艺进行了改进,实现了转炉护炉的提升,延长了转炉的使用寿命,降低了耐材的损耗,降低了转炉工序的成本。     

变频器在4#空分油泵控制系统上的应用

叙述了天铁动力厂4#空分系统辅助油泵应用EV2000变频器控制系统的过程,对运行中出现的溢油、油压波动不稳等故障现象原因进行了分析,提出了改进方案.改进后消除了故障现象,实现了闭环控制油泵的转速和启停,减小了对电机和电网的冲击和振动,提高了设备的可靠性,延长了电机使用寿命,保障了生产的顺利进行.     

浅议矿脉变化规律与探矿方法

概要介绍了樟东坑矿区的主要地质特征,在前人工作的基础上,对矿床的基本特征(尤其是矿脉的变化特征)进行了分析、探讨和总结;利用这些特性及其变化规律,采用一些新的探矿方法不但找到了一些隐伏盲矿,增加了地质储量,延长了矿山的服务年限,而且降低了探矿费用,减少了采矿的盲目性,节约了成本,增加了经济效益。     

废水处理站自动控制系统的应用

介绍了邯钢冷轧废水站的配套项目废水处理站的自动控制系统,主要从自控设备组成、网络控制系统等方面论述了控制功能的实现,该系统的应用为ERP的数据采集提供了很好的保证,提高了电气控制的集成度和可靠性,简化了控制环节,提高了生产效率.     

钻探施工方案优化实践

在矿区钻探工程施工过程中,针对钻探工程的特点及现场施工条件,对受影响的原设计方案进行了优化,全面综合分析考虑,充分利用了一切可以利用的手段和措施,提高了工程的实用性、安全性,降低了工程成本。进一步升华了钻探方案,提高了工程质量,最大程度的减少了工程施工的风险与难度,实现了企业利益最大化,同时保证企业的投资决策质量和经济效益达到了双赢。     

采用Boost技术优化企业数据备份保护架构

为了解决大型制造企业数据中心架构变更后,在数据保护方面所面临的多种难题,对适用的数据保护技术进行了研究探讨.最终实现了企业数据保护平台架构的转型升级,提升了平台自身的安全性,改善了备份数据的传输架构,备份效率提升了10倍以上.实现了备份任务的集中智能管理,节约了备份窗口,实现了备份资源的一次性分配与自动回收,释放了备份...     

用友资产管理系统在设备管理上的应用

用友资产管理系统根据天铁集团的设备管理要求配置了相关的功能模块,实现了设备管理的精细化、科学化、信息化,提高了设备的管理水平,降低了设备维修费用,同时实现了与财务一体化的无缝对接,为相关的钢铁企业设备管理信息化工作提供了参考。     

工业机器人在鞍钢型钢生产线的设计与应用

根据鞍钢股份有限公司型钢生产线工艺实际,制定了机器人硬件设计方案和机器人软件实现方案,实现了工业机器人自动贴标喷码技术在型钢生产线的应用.该系统的应用满足了产线工艺要求,提升了产线生产效率,提高了产品标识的准确性和可追溯性,贴标准确率和喷码准确率均达到了99％,实现了危险岗位无人作业,作业周期缩短了25％;同时,实现了产品标识的统一规范性,提升了企业产品形象.     

新型热轧钢卷运输系统研究

介绍了项目的背景、概况及热卷运输的特点，分析了常用的热卷运输方式的特点，详细研究了托盘式运输方案的难点和关键点，提出了首钢京唐钢铁联合有限责任公司热卷运输系统的方案。     

Behavior of Ellipsoids of Two Sizes

The influence of particle shape on granular material response is examined by using the discrete element method. Triaxial drained and undrained tests were performed on specimens of ellipsoids of two sizes. The triaxial test boundary conditions were simulated with a recently developed boundary mechanism. Different loading paths including axial compression, axial extension, lateral compression, and true extension were employed. The specimens were composed of 1,170 ellipsoids having two types of particles. The specimen is made up of 50% by weight of Type I particles that have an aspect ratio of 1.2. The aspect ratio of the Type II particles varies between 1.5 and 2. The specimens were consolidated isotropically before shearing. Comparing with the behavior of specimens of mono-size particles, a higher friction angle and a more complex particle shape effect were observed. The friction angles from the drained tests (axial extension, true extension, and lateral compression tests) were similar and the values are higher than that of the axial compression test. All simulated results are in good agreement with laboratory observation of sands.     

明日叶查尔酮对小鼠肝癌细胞凋亡相关蛋白表达的影响

Objective: The aim of our study was to investigate the effect of Angelica keiskei chalcone (AC) on the expression of Caspase-3 and Bax in mice hepatocarcinoma cells. Methods: Fifty mice inoculated hepatocarcinoma 22 cells were divided into five groups, 10 mice per group. Mice were given 5, 20, 40 mg/kg AC daily by mouth in low, middle and high dose groups respectively. Saline were given to the tumor control group by mouth. Twenty mg/kg cytoxan (CTX) by injection every other day were given to the positive control group. Ten days later, all mice were sacrificed. The levels of the Caspase-3 and Bax protein expression were measured by immunohistochemistry method and the proliferation activity of hepatocarcinoma cells was determined by MTT assay. Results: The expression level of Caspase-3 and Bax protein in tumor control group were 5.00%and 4.68%, respectively, and those of the high-dose group were 38.52% and 35.76%. The differences between two groups were significant (P ＜ 0.05). The cell proliferation activity of tumor control group and high-dose group were 1.135 ± 0.032 and 0.716 ± 0.018. The difference was significant (P ＜ 0.05). Conclusion:AC can increase the expression of Caspase-3 and Bax protein, and inhibit the proliferative activity of mice hepatocarcinoma cells.     

铝渣处理设备国产化技术应用

分析了铝渣回收的现状,介绍了引进的The Press法铝渣处理技术及其工作原理,阐述了改进后研制的热铝炉渣压渣机的结构、工艺和技术特点,并作了经济效益分析.     

利用第一性原理对Au-Pd合金颜色的计算

利用第一性原理计算了Au-Pd合金的颜色。构建了不同配比Au-Pd的晶体结构模型,采用BFGS算法对模型进行了结构优化。使用Materials Studio软件的CASTEP模块,计算了模型的反射率。利用CIELab色度空间参数,表征了Au-Pd合金的色度学参数L*、a*、b*、C*和h*。利用多项式对不同配比Au-Pd合金的色度参数进行了拟合计算。     

管道波纹补偿器的受力分析

介绍了几种波纹膨胀器的工作原理及使用原则,并对波纹膨胀器的破坏原因进行了分析,提出了详细的设计安装注意事项。     

电站锅炉燃烧器烧损的原因及对策

锅炉燃烧器投运后，多次发生烧损问题，进行试验及检查，分析燃烧器烧损的原因，提出解决方案并实施，取得了预期的效果。     

热处理对纳米氧化锆粉末性能的影响

采用共沉淀法制备纳米ZrO2粉末,对其进行不同温度下的热处理,并对经过热处理的粉末进行物理性能及形貌的测试分析。对经过热处理的粉末进行等离子球化处理,并对其形貌进行观测。采用等离子喷涂方法制备ZrO2涂层,对涂层形貌进行观测。结果表明在适当温度对ZrO2进行热处理可提高粉末松装密度、流动速率及表面光洁度,提高粉末和涂层的综合性能。     

Effect of Micro-Area pH Value on Formation of Different Rust Phases of Weathering Steel in Initial Corrosion Period

The formation of protective rust layer of atmospheric corrosion resistance was discussed for weathering steel.The rust layers of experimental steels were made by using an accelerating industrial atmospheric corrosion test of dry-wet cyclic immersion.Furthermore XRD were used to measure and analyze the rust layers.The initial corrosion processes below thin water film were observed and the changes of micro-area pH value were measured.The results are as follows:The corrosion processes of P-RE weathering steel are obviously different from those of carbon steel.The surface of P-RE weathering steel rapidly forms α-FeOOH and the micro-area pH value is above 5.4 during the initial corrosion period.While the component of the rust layer for the carbon steel is mainly Fe3O4 and the micro-area pH value is below 3.8.     

抑制剂对超细WC-Co硬质合金性能的影响

采用高能球磨、真空烧结工艺制备超细WC-Co硬质合金。研究了抑制剂的预磨时间对WC-10Co硬质合金粒度及烧结试样性能的影响。对比了相同抑制剂配比对Co含量不同的硬质合金性能的影响以及稀土对硬质合金性能的影响。结果表明:通过对晶粒长大抑制剂的预磨,其粒度明显细化。加入预磨时间为120 h的抑制剂,WC-10Co硬质合金的平均粒度为0.3μm,硬度达到92.1 HRA。相同抑制剂配比的硬质合金,硬度和致密度随Co含量的降低而增大。稀土氧化物Y2O3的加入,有利于改善硬质合金的性能。