宝钢4#高炉炉前除尘技术的进步

高炉出铁场作为炼铁厂主要污染源,其除尘节能工作非常重要,通风除尘是高炉除尘的主要方式.宝钢分公司4#高炉的除尘系统在总结前3座高炉经验的基础上从工艺流程、风量分配等方面做出多项改进和创新.铁口区域除尘设计时加强密封性能,缩小除尘空间,采用了新型铁口区顶吸罩以及龙卷风式除尘,合并一、二次除尘,从而达到"铁口强力抽风"的效果;摆动流嘴采取两侧对角抽吸的方式;在关键部位选择安装调节阀,通过控制开度实现风量在不同铁口间和不同除尘点间的精细调节.运行一年来效果良好.     

高炉出铁口喷溅问题的简易处理方法

正一、高炉出铁口喷溅问题简易处理方法的意义在日常高炉出铁过程中,常常碰到因铁口窜煤气而引发的铁口喷溅,铁口喷溅带来大量烟尘以及渣铁,极大的增加了除尘压力,造成能源浪费;大量的喷溅也会加速沟盖板和出铁沟的熔损,而且大量的喷溅物堆积增加了炉前工的劳动强度;喷溅还容易影响出铁判断导致渣铁出不尽,以至于出现堵不     

攀钢1750m3高炉出铁场设计特点

介绍了攀钢1750m3高炉出铁场的工艺布置、平台结构形式、设备选型、出铁场除尘设备等特点。高炉出铁场平坦化,使物料运输更便利,为炉前操作的自动化、铁口的操作维护、高炉的高产稳产长寿提供了可靠的保证。     

攀钢1号高炉出铁场除尘治理技术

对攀钢1号高炉出铁场除尘治理技术进行了阐述,提出了铁口悬臂烟罩＋铁口侧吸罩＋屋顶组合式烟罩的综合捕集方式,有效地治理了出铁场的污染烟尘,取得了良好的环境效益和经济效益。     

梅钢新高炉炉前设计的思考

分析了梅钢目前高炉炉前铁口配制、渣铁沟构造、进风装置、铁水运输方式、出铁场除尘等工艺设计存在的问题,对异地大修的高炉的炉前监测、信息化设计提出了改进建议。     

带有滑动门的出铁口

日本住友金属工业公司研制出一种新的出铁装置,这装置是由贮铁槽和使其在水平方向上移动的机构以及使贮铁槽与高炉出铁口连接的压紧机构组成。贮铁槽的侧壁和底部设有带滑动门的出铁口,并在侧壁下部设有与高炉出铁口连接的连通口。贮铁槽与高炉出铁口连接,高炉开始出铁和出铁终了的开铁口及堵口操作,均由出铁口的滑动门来进行。     

对高炉铁口区除尘的思考

铁口区是高炉→转炉流程钢铁厂的除尘难点之一，铁口区烟尘近一半属于可吸入颗粒物。我国多数钢铁厂位于大、中城市附近，随着环保要求日趋严格，高炉铁口区除尘将从难点问题变为热点问题。现有铁口区除尘方式（主要是二次除尘）不同程序地存在着投资及运行费用高、除尘效果差、妨碍炉前操作等缺点。铁口区除尘的关键在于二次烟尘捕集，出路在于开发出系统风量小、对炉前操作无影响、除尘效果好、投资及运行费用低的烟尘捕集系统。三段式吹吸结合二次烟尘捕集方案具有上述特点，有望实现经济的铁口区除尘。     

攀钢1750m~3高炉出铁场设计特点

介绍了攀钢1 750 m3高炉出铁场的工艺布置、平台结构形式、设备选型、出铁场除尘设备等特点。高炉出铁场平坦化,使物料运输更便利,为炉前操作的自动化、铁口的操作维护、高炉的高产稳产长寿提供了可靠的保证。     

武钢3200 m3高炉出铁场设计

结合武钢5号、6号、7号3座3200m^3高炉出铁场设计实践,对3200m^3高炉风口平台及出铁场设计的工艺布置及平台结构形式、设备选型（包括炉前吊车、泥炮、开铁口机及揭、移盖机等）、出铁场除尘抽风量及其分配等进行了阐述。     

中冶南方“高炉出铁场环境治理综合技术”通过中冶集团科技成果鉴定

2012年12月5日,在中冶集团科技成果鉴定会上,中冶南方工程技术有限公司完成的"高炉出铁场环境治理综合技术"通过科技成果鉴定。"高炉出铁场环境治理综合技术"运用空气动力学原理,引入气固两相流理论,开展了高炉铁口区域和摆动流嘴除尘罩内的粉尘参数和气流分布、粉尘逃逸路径及捕集效率的CFD数值模拟与分析,改     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.