电弧炉炼钢应用铝灰升温的试验研究

利用铝灰中残铝的氧化放热进行钢水提温节电，在国内外已有应用先例，结合我厂电炉工艺现状，本文对铝灰的不同使用方法和效果进行了讨论。认为在熔化期采用铝灰升温的工艺效果较好。     

3Cr2NiMoA模具钢冶炼生产实践

为满足高质量模具钢的市场需求,结合工艺设备条件,通过全冶炼流程综合工艺控制,采用EAF冶炼→LF精炼→VD工艺路线生产3Cr2NiMoA模具钢,实现化学成分精准控制,有效降低了3Cr2NiMoA钢中P、S和气体含量.     

Influence of nitrogen impurities on the characteristics of a patterned helium dielectric barrier discharge at atmospheric pressure

In this paper, a two-dimensional axisymmetric fluid model was established to investigate the influence of nitrogen impurity content on the discharge pattern and the relevant discharge characteristics in an atmosphere pressure helium dielectric barrier discharge (DBD). The results indicated that when the nitrogen content was increased from 1 to 100 ppm, the discharge pattern evolved from a concentric-ring pattern into a uniform pattern, and then returned to the concentricring pattern. In this process, the discharge mode at the current peak moment transformed from glow mode into Townsend mode, and then returned to glow mode. Further analyses revealed that with the increase of impurity level, the rate of Penning ionization at the pre-ionization stage increased at first and decreased afterwards, resulting in a similar evolution pattern of seed electron level. This evolution trend was believed to be resulted from the competition between the N₂ partial pressure and the consumption rate of metastable species. Moreover, the discharge uniformity was found positively correlated with the spatial uniformity of seed electron density as well as the seed electron level. The reason for this correlation was explained by the reduction of radial electric field strength and the promotion of seed electron uniformity as pre-ionization level increases. The results obtained in this work may help better understand the pattern formation mechanism of atmospheric helium DBD under the variation of N₂ impurity level, thereby providing a possible means of regulating the discharge performance in practical application scenarios.     

唐钢电弧炉泡沫渣埋弧冶炼的实践与探讨

介绍了泡沫渣形成基本原理及影响其形成的因素，并结合唐民炉炼钢厂采用泡沫渣埋弧冶炼工艺的实践，阐述了该工艺技术在弧炉炼钢生产中的作用，具有推广应用的价值。     

电弧炉吹氧重熔硅锰合金

通过对锰铁、硅铁合金冶炼条件及过程的分析,借鉴电炉炼钢有关工艺,探讨电炉以锰铁、硅铁筛下物为主要原料,用重熔法冶炼硅锰合金的工艺方法。     

电弧炉炉内脱氧工艺的选择与优化

根据电弧炉炉内脱氧工艺现状，对当今几种实用脱氧工艺进行了分析，提出了具体条件下对脱氧工艺改革的必要性以及应当遵循的科学原则。     

电弧炉炉内脱氧工艺的选择与优化

本文根据电弧炉炉内脱氧工艺的现状，对当前几种常用脱氧工艺进行了分析，并提出工艺改革的必要性和应遵循的科学原则。     

电弧炉炼钢应用铝灰升温的试验研究

利用铝灰中的残铝氧化放热进行钢水提温节电,在国内外已有应用先例。本文旨在结合我厂电炉现状,对铝灰的不同使用方法和效果进行探索。通过试验,得出了铝灰升温不同工艺方案的效果。     

基于在线监测系统的输电线路覆冰数据统计与分析

输电线路覆冰在线监测系统可以实现对架空输电线路覆冰状况的实时在线监测。为此,基于输电线路覆冰在线监测系统的监测数据,统计得到了数据特征和覆冰数据聚集类型;发现测量终端普遍仅记录厚度>2mm的线路覆冰,且在覆冰期间无法测得风速及风向;有效覆冰数据主要以短期振荡、中短期维持、较长期维持以及完整发展过程4种方式聚集,其中具有明显增长和消融阶段的完整过程覆冰对线路威胁最大。此外,在风速和风向等微气象监测参量缺失的情况下,对长期低温高湿环境下的覆冰发展趋势进行了整体和局部的分析,发现单位时间覆冰增长质量基本满足均值为0、过峰度、正偏离的类正态分布,且覆冰增长阶段呈线性增长态势,一次函数模型拟合效果较指数模型更好。结果表明:只有持续时间较长的低温雨雪冰冻天气环境下形成的覆冰才可能对线路安全运行造成威胁;单位时间覆冰增长质量近似服从正态分布;覆冰稳定增长时期,覆冰质量序列与时间呈相关度很高的一次线性函数关系,可考虑建立简单的线性增长模型应用于线路覆冰预警。