CAPL炉辊表面粗糙度变化与分析

宝钢CAPL机组炉辊上机使用后会出现表面粗糙度急剧下跌现象,简单介绍了炉辊表面粗糙度的原始设计,并根据现场掌握的经验分析了粗糙度基本变化规律,并提出了现场应采取的炉辊表面粗糙度保持措施以及后续喷涂工艺的建议。     

电子束冷床熔炼TC4钛合金的热变形行为

使用Gleeble-3800热模拟实验机进行一系列热模拟压缩实验,研究了电子束冷床熔炼TC4钛合金在变形温度为850℃~1100℃、应变速率为0.01 s^-1~10 s^-1条件下的热变形行为。根据真应力-真应变曲线分析变形参数对流变应力的影响,分别建立电子束冷床熔炼TC4钛合金在(α+β)两相区和β单相区的Arrhenius本构模型,绘制了基于动态材料模型的热加工图。结果表明：流变应力随着温度的提高和应变速率的增大而降低;(α+β)两相区的热变形激活能Q=746.334 kJ/mol,β单相区的热变形激活能Q=177.841 kJ/mol;用相关系数法和相对平均误差分析了模型的误差,相关系数R²=0.995,相对平均误差AARE=5.04%。这些结果表明,所建立的模型较为准确,可准确预测其热变形流变应力;合金的最佳加工区域为：变形温度1000~1100℃、应变速率0.01~0.1 s^-1。     

Real-time blast furnace hearth liquid level monitoring system

A stable and efficient blast furnace operation requires proper control of hot metal and slag drainage from the hearth. Many operational problems such as non-dry casts, blow outs, excessive hearth lining wear and low-blast intake arise when the liquid level in the hearth exceeds the critical limit where hearth coke and deadman start to float. Since the direct measurement of the hearth liquid level is practically impossible due to high temperature and pressure inside the furnace, it is therefore important to estimate the liquid level in the hearth and display it to the operators on real-time basis for efficient cast management. This paper presents a system, called hearth liquid level monitoring (LLM), which simulates the liquid level and drainage behaviour of the furnace hearth. It is based on the theoretical hot metal and slag generation rate from the specific oxygen rate and the computed drainage rate from torpedo radar signals and the slag flow measurement system. The system advises the blast furnace operator when to initiate tapping and close the taphole when the liquid level is controlled. It also alerts operators when to use the larger drill bit diameter for opening the next cast.     

宝钢1BF陶瓷杯炉缸的维护与管理

介绍了 1BF(第 2代 )投产近 3年陶瓷杯的使用情况 ,重点提出了陶瓷杯炉缸管理温度标准与对策 ,认为 :通过严格的管理 ,炉缸使用陶瓷杯有助于减缓炉缸侧壁的侵蚀速度 ,可改善炉缸侵蚀这一高炉长寿上致命的薄弱环节。     

基于知识工程的三维造型在辊道窑结构设计中的应用

本文通过分析陶瓷辊道窑的结构特点和介绍知识工程KBE的概念以及论述如何把知识工程运用于参数化的三维造型中，提出了基于知识工程的三维造型在陶瓷辊道窑结构设计中的应用。通过基于知识工程的三维造型的运用，不但可以明显的提高辊道窑的设计效率和质量，而且可以真正的实现计算机辅助设计。     

Magnetically confined high power thermionic line source emitter assembly

A directly heated thermionic high power electron beam source was constructed. The circular cross-section tungsten line cathode of length 140 mm with diameter 0.9 mm was used. Different gun design parameters were investigated and their results are discussed in detail. A uniform external magnetic field of 50 G was employed for focusing of electron beam at 180 ° deflection. The gun delivers uniform emission current density throughout the emission surface. The dimensions of the electron beam at worksite were comparable with the line cathode. The beam power of 57 kW was successfully achieved well below the saturation limit. The spring action mechanism was especially designed to avoid any cathode deformation. The gun design facilitates the reported length and emitting surface temperature of the cathode to be further increased to obtain higher emission values. The important gun features are operational reproducibility and long time stability. The evaporation rates for stainless steel have been achieved up to 1 kg/hr. An area of (280×120 mm²) could be heat treated with the line source electron beam in few milliseconds. The gun is extremely useful for melting, evaporation and heat treatment.     

Blast furnace campaign extension by fundamental understanding of hearth processes

In blast furnace ironmaking hearth performance has a critical effect on the efficiency of the operations and the campaign duration. In this paper the relationship between hearth lining design and lining wear is analysed, based on plant data and research activities of Tata Steel Europe that is supported by information published elsewhere. Tools to model, monitor and visualise the hearth processes are discussed. Current hearth management practices are illustrated. It is noted that the varying process conditions make current campaigns less predictable than previous ones. The hearth lining design rules developed decades ago seem to be in need of revision.     

2号高炉风口破损的分析

本文分析了２号高炉在喷煤条件下风口大量破损的原因，并提出了相应的措施。     

高炉妒缸炉底侵蚀预测数值模拟

介绍了用有限单元法建立的炉缸炉底侵蚀模型,及用VB编制的高炉通用的炉缸炉底温度场及应力计算软件。该软件在侵蚀线逼近问题上采用一种新的方法即单元物性转换法,大大减少了计算时间,提高了计算精度;该软件可以实现对不同结构的炉缸炉底进行温度场模拟,并实现了侵蚀线,应力应变分布线的绘制和计算结果的存储等功能。     

辊底式热处理炉炉底辊在线更换检修的探索

针对舞钢新轧钢厂热处理线炉底辊频繁断裂的问题,分析了现行炉底辊更换方法的优缺点,结合生产及现场实际,提出了简单易行的炉底辊在线更换方案,实现了不停炉更换炉底辊,不仅缩短了停炉时间,还避免了能源消耗,取得了良好效果。