炼钢间冷闭式循环冷却水系统缓蚀剂的应用

根据炼钢间冷闭式循环冷却水系统水质特点,研制一种环境友好型缓蚀剂,该缓蚀剂以硼酸盐为主体,复配稀土元素盐及多元有机羧酸盐等其它药剂,对常用在闭式循环冷却水系统的金属材质都有很好的缓蚀效果。经过现场应用,证明该药剂具有很好的缓蚀效果。     

Metol as Corrosion Inhibitor for zinc

The inhibition behavior of metol (N-methyl-p-aminophenol sulphate) on zinc in different corrosive solutions at room temperature was investigated by various techniques such as weight loss, polarization and linear polarization methods. The percentage inhibition efficiencies were evaluated at different concentrations of the inhibitors. The corrosion rate, inhibition efficiency and surface coverage were dependent on metol concentration. The electrochemical data indicated a basic modification of zinc surface resulting in a decrease in the corrosion rate. Corrosion inhibition was explained by considering an interaction between metal surface and the inhibitor. SEM images and FT-IR profiles confirmed the formation of passive film on the metal surface.     

连铸机二冷水串联系统在线维护

对莱钢炼钢厂1#～3#连铸机二冷水串联系统进行在线维护,采用短流程截流、短路回流技术对连铸二冷水集水井和连铸旋流井的供、回水系统进行改造。实施后,水的悬浮物由40mg/L降低到10mg/L,连铸机喷头堵塞由30个/浇次降低到8个/浇次。     

对冷媒水系统腐蚀的原因分析及改进措施

从水质、微生物、泄漏、流速、温度等5个方面对引起焦炉煤气净化回收系统循环冷却水腐蚀的原因进行了分析．并提出了一些针对性的改进措施。     

低温低浊水处理技术研究进展

低温低浊水较难处理,成为给水处理中的难题.根据低温低浊水水质特征分析其难处理原因,通过查阅文献,综述了混凝药剂及各种处理方法在低温低浊水中的应用,指出加强混凝及深度处理工艺研究,是低温低浊水处理的发展方向.     

低合金耐海水腐蚀钢的开发

 设计、冶炼了Cu-Mo和Cu-Mo-Cr系的3种成分的耐海水腐蚀钢,并轧制成20mm厚钢板,然后测试了设计钢种的力学性能、耐海水腐蚀性能及焊接性能。96,240,336和500h盐雾加速腐蚀试验结果表明：与普通碳素钢（SM490A）相比,3种设计钢的耐海水腐蚀性能均有明显提高,且随着腐蚀时间的延长优势更明显。设计钢种的耐腐蚀性能随Cr含量增加而增加,当Cr质量分数为0.85%时,耐腐蚀性能比对比钢提高59.1%。Cr元素在内锈层的均匀富集有效阻碍了Cl-的侵蚀,提高了耐腐蚀性能。Gleeble热模拟结果表明：不预热和焊后热处理,在焊后冷却速度为5~60℃/s时,焊接粗晶区的KV≥57J,揭示了设计钢种良好的焊接性能。     

再生水水质对循环冷却水系统腐蚀的实验研究

通过单因素实验和正交实验,研究了再生水在回用过程中,水质对循环冷却水系统腐蚀的影响。结果表明,NH+4-N、SO2-4、Cl-是导致循环冷却水系统内腐蚀的主要因素,并且NH+4-N影响最严重。     

低温矿井水在高炉冷却系统中的应用

采用BR1．1XC（1．0／100）142型板式换热器冷却,以低温矿井水为冷媒水,对高炉冷却系统进行了改造,替代了冷却塔,节省了一次性建设费用和日常运行费用。应用表明,高炉供水温度稳定在30～36℃,比采用冷却塔降低约15℃。     

敞开式净循环水系统经济浓缩倍数的研究

运用生命周期成本法分析了首钢京唐钢铁公司某敞开式净循环水系统的生命周期成本。对该系统在运行过程中涉及的各项成本进行量化分析,并且随季节变化而改变系统边界条件,从而得出不同的浓缩倍数的优化结果。企业可由此借鉴开式循环水系统的优化设计、运行及改造。     

耐海水腐蚀钢的开发与研制

论述了化学成分、轧制工艺对耐海水腐蚀钢机械性能、工艺性能及耐腐蚀性能的影响。经热轧试验结果表明，其冶炼、轧制工艺是合理的，在现有工艺装备条件下生产耐海水腐蚀钢其机械性能、焊接、耐腐性能完全达到新日铁标准。     

汽轮机凝汽器冷却管的腐蚀和预防

1前言 在电厂热力系统中,凝汽器承担着将汽轮机的排汽凝结成水,并在排汽口建立并保持高度真空,因此,凝汽器设备运行的好坏直接影响到发电厂的安全经济性;目前电厂所用凝汽器基本上是表面式的,由壳体、管板和铜基合金冷却管组成.日常运行过程中除换热面（冷却管表面）污染影响换热外,处于外围和空气冷却区的冷却管的腐蚀损坏一直是影响凝汽器正常运行和使用寿命的重要问题.     

大圆坯连铸二冷配水设计模型的开发

根据钢厂新建Φ600 mm圆坯连铸机的主要技术参数,建立柱坐标一维非稳态连铸坯凝固传热数学模型,运用有限差分法求解并编制相关程序,分析拉速、过热度、冷却强度对铸坯温度的影响,实现在给定水量下连铸坯温度场的计算。浇铸Φ500 mm轴承钢GCr15SiMn计算得出拉速每提高0.1 m/min,出结晶器处凝固坯壳厚度减薄约7.9 mm,凝固终点延长6.7 m。     

Retrofit Storm Water Retention Volume for Low Impact Development

The concept of low impact development (LID) applies decentralized on-site runoff source control to storm water management. LID is an integration of bioretention and vegetated landscapes to maintain a catchment’s hydrologic and ecological functions. In current practice, the LID implementation is quantified for the specified watershed development. During the dynamic development process, the existing LID facilities have to be improved according to the incremental changes in the watershed. This technical note presents an on-site hydrologic approach to relate the required incremental storm water retention volume to the alteration of surface imperviousness in the tributary area. This approach allows the storm water retention volume to be tailored according to the stage of the watershed development. Cumulatively, the total storage volume can be achieved though multiple stages of the watershed development. The incremental retention volume is found to be related to the local average event rainfall depth. Design charts were produced and normalized by the local average rainfall event depth for generalized applicability.     

工业循环冷却水水质稳定剂的研制与应用

通过对循环冷却水的阻垢和缓蚀药剂配方筛选实验和现场工业实验与应用，探索出了一条解决高硬度高碱度且含盐量变化频繁的工业循环冷却水的阻垢和防腐问题的方法。     

Evaluation of Surface/Solution Interface on Carbon Steel in Contact with a Phosphonate-Based Ternary Corrosion Inhibitor System

Results of studies on interface produced on carbon steel in chloride environment containing a new ternary corrosion inhibitor formulation are presented. The surface/solution interface was developed by immersing the carbon steel in a solution containing 1-hydroxyethane-1,1-diphosphonic acid (HEDP), Zn(II) and folic acid (FA). Polarization studies indicate that the formulation is capable of affecting both the partial reactions occurring on the metal surface. Impedance studies reveal that significant changes in surface/solution interface occur as inferred by enormous increase in charge transfer resistance in the medium containing the inhibitor system. X-ray photoelectron spectroscopic studies infer presence of oxides of iron, hydroxides of iron and zinc as well as heteroleptic complex, [Fe(III), Zn(II)–HEDP–FA] in the surface film. Fourier transform infrared spectrum of the surface protective film supports the presence of these compounds in the surface film. Morphological and topographical features of the protected and unprotected metal surface recorded by scanning electron microscope and atomic force microscope respectively are presented. Consolidating the results of all these studies, mechanistic aspects of corrosion inhibition are proposed.     

高炉密闭循环冷却水系统严重腐蚀的处理及控制

1概述八钢2#高炉在1999年7月扩容为380m3,其炉体冷却方式由原来的敞开工业水循环冷却改为密闭软水循环冷却,其工艺流程如图1。图1密闭软水循环冷却工艺流程示意图密闭软水循环冷却方式相对于工业水循环冷却和汽化冷却方式,运行稳定、不结垢、耗水量少、换热设备使用寿命长等优点,被国内众多钢铁厂广泛采用,如果管理到位,一代炉龄可以长达12～15年以上,据有关资料显示德国霍什7#高炉采用软水冷却方式连续运行11年,冷却壁水管的损坏率还不到1%。2#高炉在投入生产前对此循环水系统进行了清洗预膜,由某公司实施了整个清洗预膜过程。但投入运行后…     

Development of Global Integrated Water Management Systems

The global water crisis continues, caused primarily by a continued increase in population, environmental degradation and climatic variability complicated by potential changes in climate. Solutions to water problems can no longer be viewed on a location-by-location basis. Solutions must be regional in scope, address the supply and demand issues and factor in non-structural approaches. The U.S. engineering profession has developed sophisticated integrated water management technology that is in demand internationally and has the potential to reduce the water crisis problems in developing countries.     

Development of High-Strength and Atmospheric Corrosion Resistant Steel Bars with Low Cost

Metallurgist - Some measurements including tensile test, cyclic immersion corrosion, metallographic microscopy, SEM and XRD were used to clarify the influence of Cu, P addition and cooling...     

结晶器水冷却系统改进

针对连铸结晶器水冷却系统振动问题,采用了低成本、易维护、高可靠性的改进设计,将振动减少到了对管路无危害的程度,保证了结晶器工作的安全,节约了成本。     

连铸机二次冷却水的比水量控制

为克服现行连铸二冷水控制模型的缺陷，提出了新的比水量自动配水控制模型，计算机根据生产情况的变化，自动选定配水模型以控制水表，该模型还考虑了各段喷嘴的有效性。