辊磨减速机的发展及应用

介绍了辊磨减速机国内外的发展与技术现状,对辊磨减速机采用的关键技术进行了简要说明,分析了辊磨减速机不同传动结构的优缺点,进而从齿轮技术、新型传动形式、在线监测及故障诊断技术等方面对辊磨齿轮减速机的发展进行了展望。     

φ3.2m×13m高细磨磨内结构的改进

介绍了一种与辊压机配套的3.2m×13m高细磨的磨内结构,产量达100t/h,最高达115t/h。与传统高细磨管磨机的磨内结构进行了对比,分析了传统高细磨磨内结构配套辊压机后的不适应性。本磨机的回转内部结构解决了3.2m×13m高细磨配辊压机的工艺系统台时产量低、磨内温度高、堵料频繁的问题,提高了生产效率,降低了能源消耗,能为企业带来更大的经济效益。     

Modeling and simulation of wet-end white water system in the paper mill

A dynamic model representing the wet-end of a paper mill is developed to characterize its dynamic behavior. The model is based on the mass balance relationships written for the simplified wet-end white water network. The dynamic response of the wet-end is influenced both by the white water volume and by the level of wire retention. Effects of key manipulated variables such as the thick stock flow rate, the ash flow rate and the retention aid rate on the major controlled variables are analyzed by numerical simulations. It can be said that the consistency of the model with plant data seems to be reasonably good and can be used as a tool for plant analysis and control.     

黑色耐高温铁酸锰颜料生产工艺研究

总结了黑色耐高温铁酸锰颜料生产工艺研究过程,包括前驱体制备、煅烧工艺、研磨工艺,表面包膜工艺、表面改性工艺、易分散微细化工艺等。     

Microstructural development and electrical behavior during crystalization of iron-rich glass-ceramics obtained from mill scale

Mill scale is one of the most hazardous waste generated from the steelmaking industry. In 2014, around 16.4–32.8 million t of mill scale was generated all over the world. In this paper, we present recent results about the effect of the structure and microstructure of iron-rich glass-ceramics obtained from mill scale on their electrical behavior. Five iron-rich glass compositions were investigated. The crystalline phases of the crystallized (glass-ceramic) materials were identified by X-ray diffractometry, and phase content quantifications were performed by the Rietveld method. The crystallinity and porosity were also related to the electrical behavior of the glass-ceramics, which was determined by impedance spectroscopy, and the hardness, measured by the Vickers indentation method. Albite, andradite, anorthite, clinopyroxene, franklinite, nepheline, and spinel were shown to be the main crystalline phases present in the investigated compositions. The conductivity showed an increasing trend with the degree of crystallinity. This behavior was attributed to a decrease in porosity, an increase in the concentration of charge carriers in the glass phase (iron, Li⁺, and Na⁺), and an increase in the number of conduction paths through the glassy phase/crystalline phase interfaces. The relationship between hardness and crystallinity could not be verified due to the structural complexity of the glass-ceramics studied. However, a nearly linear relationship was found between the effect of porosity and hardness. The G2Z composition exhibited a hardness of 6.1 ± 0.5 GPa at 850 °C, which is a value in very good agreement with other iron-rich glass-ceramics studied.     

安钢炉卷轧机生产线工艺设计特点

介绍了安钢炉卷轧机生产线的工艺设备情况及主要技术参数，并对其拥有的处于世界先进水平的高效节能步进梁式加热炉、自动化控制系统、温度闭环控制系统等技术及设备进行了阐述。     

E型磨煤机钢球消失模铸造工艺及数值模拟

用消失模工艺铸造E型磨煤机用耐磨空心钢球,设计了侧注、顶注两种工艺方案,并用华铸CAE分析系统对两种方案进行充型和凝固模拟,并对两种方案的模拟结果进行分析和对比。另将试验结果和模拟结果作对比。分析了在铸造大型空心钢球方面,用消失模工艺方法生产的优势和劣势。     

宝钢热连轧机组新技术的运用及效果

本文结合宝钢2050mm热连轧机组投产三年来的生产实践，概述了这套轧机“十大”新技术的实际应用效果，并提出今后改进方向。     

板带宽度对板凸度的影响

采用轧辊弹性变形影响函数法，计算了四辊轧机板宽与板凸度等相互关系，同时确定出产生最大板凸度的板带宽度。     

从斜轧技术发展看自动轧管机组的改造方向

对斜轧技术的发展和传统斜轧“横锻效应”的副作用作的介绍和分析，并列举几种新型的斜轧穿孔和轧管设备的特点，提出用三步成型轧管工艺代替老式多工序轧管工艺以改造现有自动轧管机组。