韶钢1号高炉延长冷却壁寿命的措施

针对韶钢1号高炉冷却壁破损原因,采取了调整风口、加大冷却强度、优化上下部操作制度和稳定热制度等措施,稳定了渣皮和炉况,遏制住了冷却壁频繁破损的势头,冷却壁工作状态良好,炉况顺行。     

韶钢1号高炉优化高炉操作延长冷却壁寿命实践

通过对影响韶钢1号高炉冷却壁寿命因素的分析,采取调整风口、加大冷却强度、优化上下部操作制度和稳定热制度等措施,稳定了渣皮和炉况,遏制住了冷却壁频繁损坏的势头,2014年4月份后炉况顺行,冷却壁工作状态良好,未再继续烧损.     

济钢3号高炉延长冷却壁使用寿命实践

对济钢3号高炉延长冷却壁寿命实践进行总结。针对影响高炉冷却壁寿命的因素,采取了加长风口、优化上下部操作制度和造渣制度等稳定炉况的措施,遏制住了冷却壁频繁损坏的势头。     

韶钢3200m~3高炉维护渣皮稳定性的措施

针对2012年上半年韶钢8高炉炉况波动大,尤其是渣皮脱落频繁,很难形成相对稳定的操作炉型,对高炉操作带来了很大困难.为此,通过对高炉布料制度的优化、下部送风制度调整、合理的炉温控制、稳定和提高原燃料质量、加强炉前出铁和铜冷却壁温度及软融带根部的控制等措施,找到了适合的高炉操作制度,形成稳定的高炉操作炉型,实现了炉况稳定顺行.     

武钢7号高炉稳定炉况操作实践

对武钢7号高炉稳定炉况操作实践进了总结,通过采取缩小进风面积、调整上部操作制度、处理漏水冷却壁等一系列措施,稳定了炉况,使生产指标稳步提升。     

邯钢西区1号高炉铜冷却壁长寿管理经验

邯钢西区1号高炉投产至今已生产9年多,铜冷却壁没有损坏一块。从铜冷却壁的日常维护管理、高炉原燃料管理、气流调剂控制及设备管理等方面,对铜冷却壁长寿管理经验进行了总结。认为避免铜冷却壁表面渣皮长时间地频繁脱落、保证高炉炉况长周期的稳定顺行、避免因设备原因造成高炉大减风或无计划休风、保证冷却系统水压和水量合理稳定,均有利于高炉铜冷却壁的长寿。     

宣钢4号高炉炉役中后期减少冷却壁损坏生产实践

针对宣钢4号高炉炉役中后期冷却壁水管频繁烧坏的现象,采取缩小进风面积适当提高鼓风动能、优化布料方式稳定煤气流分布、稳定炉温降低含硅量标准偏差、延长出铁时间减少铁前憋风等措施,达到了大幅减少冷却壁水管损坏且高炉炉况长期稳定顺行、技术经济指标显著改善的目的。     

3号高炉(二代)炉墙结厚与操作炉型的管理

宝钢3号高炉(二代)炉体采用铜冷却壁,开炉两年后首次发生炉墙结厚,由于结厚处理时间长、炉况波动大,严重影响生产。分析认为,冷却壁镶砖的不均匀侵蚀是造成本次炉墙结厚处理困难的主要原因。对使用铜冷却壁的高炉在生产中如何控制操作炉型给出了建议。通过减少原料入炉粉末;稳定顺行,保持炉况稳定;防止边缘气流过重;提高软熔带位置;建立适宜的铜冷却壁冷却制度等可以防止炉墙结厚的发生。     

济钢6号高炉冷却壁破损分析

对济钢第一炼铁厂6号高炉冷却壁破损原因进行分析，认为高炉操作制度不合理造成渣皮不稳定，冷却水质差等冷却系统运行不稳定等是影响冷却壁寿命的主要原因，为此，提出了优化高炉操作制度，加强炉体维护，改善高炉冷却水质，加强设备点检等多项措施，以保证高炉炉况的长期稳定顺行。     

2500 m3高炉冷却壁破损原因及防治

根据河钢宣钢2#(2 500 m~3)高炉炉役后期出现的一些反常炉况,判断出高炉冷却系统存在破损漏水问题。分析了2#高炉冷却壁损坏的原因,并提出了防治措施。认为高温煤气直接灼烧冷却壁、边缘煤气流波动大、设备老化、有害元素循环富集等是导致冷却壁破损的主要原因。通过调整高炉操作制度,改善原燃料条件,减少各种有害元素含量,稳定热制度、强化炉型管理、建立以中心为主的气流分布模式,稳定边缘,杜绝炉体热负荷剧烈波动等措施,有效延缓了冷却壁的损坏。     

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.