济钢1 750 m3高炉薄壁炉衬操作技术

济钢1750m^3高炉采用砖壁合一的薄壁内衬结构。针对薄壁内衬高炉的技术特点，通过采取加强原燃料质量管理、重视上下部调剂、优化布料矩阵、控制合理的煤气流分布、完善冷却体系管理、控制合理操作炉型、狠抓设备点检等措施，高炉各项技术指标明显改善。     

HEMA共聚物水凝胶中水的存在状态

用过氧化二苯甲酰(BPO)作为引发剂，合成了N-乙烯基吡咯烷酮(NVP)／甲基丙烯酸β-羟乙酯(HEMA)和NVP/HEMA／甲基丙烯酸甲酯(MMA)共聚物水凝胶，用差热扫描量热法(DSC)和热重法(TG)对这些亲水凝胶中吸附水的状态进行了研究．结果表明，水凝胶中水的状态大致可分为自由水、可冻结的结合水和非冻结的结合水．不同用量的MMA与NVP和HEMA共聚，溶胀度不同，其吸附水中不同状态水的含量也有所差异，结果表明，随着MMA含量的增加，水凝胶中非冻结结合水的含量也增加。     

Applications of Thermoelectric Power Measurement to Deterioration Diagnosis of Nuclear Material and Its Principle

In order to non-destructively evaluate changes in toughness of cast duplex stainless steel, which is frequently used in main coolant pipes of PWR type nuclear power plants, due to thermal aging, we tried to apply thermoelectric power (TEP) measurement. because TEP is sensitive to microstructural material changes, and to clarify the mechanism behind TEP changes due to thermal aging. As a result, TEP of cast duplex stainless steel increased with aging time, and good correlations were found between TEP and toughness. Concerning the mechanism, TEP of high and low Cr content alloys was higher than that of intermediate Cr content alloys. Because high and low Cr areas are created in the ferrite phase due to thermal aging. TEP of the entire material increased. Furthermore, when each Cr fluctuating area acted in parallel, the increase in TEP became larger. According to the Mott-Jones theory, TEP is largely related to the electron density of states at the Fermi level. The electron density of states of Fe–Cr–Ni alloys in the valence band was measured with X-ray photoelectron spectroscopy (XPS). As a result, there was a high correlation between the TEP calculated from the XPS spectrum and the measured TEP. Therefore, we showed experimentally that the electron density of states changed due to variations in Cr concentration, which also affect TEP.     

Viscosity of Gaseous Mixtures of HFC-134a (1,1,1,2-Tetrafluoroethane)+HFC-32 (Difluoromethane)

This paper reports experimental results for the viscosity of gaseous mixtures of HFC-134a (1,1,1,2-tetrafluoroethane)+HFC-32 (difluoromethane). The measurements were carried out with an oscillating-disk viscometer of the Maxwell type at temperatures from 298.15 to 423.15 K. The viscosity was measured for three mixtures containing 25.00, 52.40, and 74.98 mole% HFC-134a in HFC-32. Experimental results for the viscosity at normal pressures show a minimum as plotted against mole fraction in the higher temperature region, which may be the first experimental observation of the minima for dilute binary gaseous mixtures of HFCs. The viscosity at normal pressures was analyzed with the extended law of corresponding states developed by Kestin et al., and the scaling parameters were obtained for unlike-pair interactions between HFC-32 and HFC-134a. The modified Enskog theory developed by Vesovic and Wakeham was applied to predict the viscosity for the binary gaseous mixtures under pressure. As for the calculation of pseudo-radial distribution functions in mixtures, a method based on the equation of state for hard-sphere fluid mixtures proposed by Carnahan–Starling was applied.     

钮扣用黄铜带退火工艺探讨

用于制造高质量钮扣的黄铜带生产工艺较为复杂，由于大多数铜加工厂设备所限，产品批量生产性能不     

安钢5″300m^3高炉大料钟拉杆弯曲变形事故分析与处理

针对安钢哺5#300m3高炉大料钟拉杆弯曲变形,导致大钟关闭不严、炉顶压力波动大,严重影响高炉炉况顺行的实际情况,分析了大料钟拉杆发生弯曲变形的原因,探讨了快速更换拉杆的可行性方案.     

快速更换大钟吊杆和拉杆的措施

液压炉顶大钟吊杆和拉杆出现弯曲会影响大钟和大钟斗的密封 ,从而影响高炉的稳定顺行。结合安钢 6# 高炉大钟吊杆和拉杆弯曲后的实例检修 ,旨在说明在日常检修中可以实现快速更换大钟吊杆和拉杆 ,并提出在快速更换过程中的注意事项     

宝钢HPH罩式炉控制模型回归

退火加热时间是HPH罩式炉生产控制的依据，控制模型计算的准确性直接影响生产的自动化水平和效率。由于引进的控制模型不能完全适应宝钢现场条件，计算值不准确，需要人工干预，增加了控制的随机性。经过验证的传热模型虽然能够准确地模拟退火过程，求得退火时间，但其计算速度不能满足现场控制要求。本文在原控制模型的基础上，采用回归方法建立了退火加热时间的数学模型，回归使用的数据是传热模型的计算值。方差分析表明，该模型与数据拟合较好。     

利用腔量子电动力学技术来制备多个分离腔场的纠缠

提出了一种利用单模腔场与三能级原子的共振相互作用制备多个分离腔场的纠缠态的方案.首先研究两个分离腔场产生纠缠的情况,然后推广到N个分离腔场纠缠的情况.     

双模压缩真空态在Tavis-Cummings模型中量子态保真度

考虑了原子的偶极相互作用,通过计算Tavis-Cummings模型下压缩真空态的保真度,阐明了在双模压缩真空态与环境(原子)通过双光子发生相互作用过程中量子信息的保真程度随时间的演化关。通过计算机模拟出两原子处于各种初态下时原子、光场和系统的保真度随时间的演化图象,分析出三者在压缩指数r、偶极相互作用常数ga和相位(?)等改变时的变化情况,结果表明r和k值的改变对于提高保真度具有重要意义。当两原子处于基态时减小r和当两原子处于一Bell基时增大都可以显著的提高体系的保真度。