重钢4号高炉冷却状况分析

在对重钢4号高炉各冷却部位冷却水量和冷却水温差进行全面测试的基础上，分析讨论了重钢4号高炉冷却制度特征，提出了高炉炉腹中部以上冷却水温差波动过大是造成4号高炉炉墙结瘤，引起高炉炉况不顺的原因之一，加强冷却制度管理不仅有利于高炉顺行，也有利于高炉生产指标的改善和经济效益的提高。     

技术信息

宝钢 2号高炉跻身世界高效长寿高炉行列2 0 0 4年截止到 8月 2 8日 ,宝钢股份投产 13年的 2号高炉累计产铁量达到 4 0 6 3万 t,单位炉容产铁量突破万吨大关 ,创造了国内高炉长寿新纪录 ,跻身世界高效长寿高炉行列 ,宝钢 2号高炉是首次由中国自行设计、建设、开炉的 4 0 0 0m3级特大型高炉 ,炉容为 4 0 6 3m3,国产化率达 90 %以上。该炉投产 11个月各项指标均达到标准 ,其后创造了日吨铁工序能耗 372 .79kg标准煤的世界先进水平。在高炉长寿方面 ,宝钢成功研制了安装微型冷却器技术 ,有效解决了热负荷波动对高炉炉墙的破坏 ,建立了炉缸活跃指…     

首钢高炉长寿维护实践

对首钢高炉长寿维护经验进行了总结.首钢1、3、4号高炉均已连续安全生产15年以上,主要通过对炉缸水温差的合理控制,稳定高炉冷却水质,及时维护高炉本体受损冷却壁,定期进行高炉炉内喷涂造衬,来提高高炉寿命.     

邢钢4号高炉增设炉底水冷管的实践

4号高炉(300m~3)炉底采用高铝砖砌筑、自然冷却。但是,自1997年高炉进行强化冶炼、使用斜风口以来,炉底温度持续升高,增设炉底水冷管前,炉底温度已上升到778℃。为防止炉底烧穿,经过对现场调查及对安钢的考察,决定在4号高炉增设炉底水冷装置。 1 前期准备工作 1.1 炉底剩余厚度的计算 经查阅有关文献,并根据4号高炉实际     

柳钢高炉炼铁技术进步

1 概述 柳钢现有5座300m~3级高炉(1、2、4号高炉306m~3,3、5号高炉380m~3),其中5号高炉于2001年10月底建成投产,3号高炉于2002年8月停炉大修,10月17日点火送风,1号高炉于2002年12月13日停炉大修,计划2003年1月底开始生产;1、3、4号     

本钢5号高炉护炉实践

本钢5号高炉的护炉实践证明,高炉配加适量钒钛矿,能在炉缸、炉底析出钛的碳、氮化合物,形成坚固的保护层,起到护炉的作用,使频临停产的5号高炉服役期延长两年以上,并实现按计划大修,取得显著的经济效益。     

酒钢1号高炉炉体现状及其护炉措施

酒钢1号高炉第二代已开炉4年,炉体现状是Ⅱ、Ⅴ段冷却壁热流强度高、炉腹以上砖衬侵蚀严重、冷却设备损坏超过半数,高炉处于炉龄末期,为了延长高炉寿命,实现按计划大修,采取强化冷却、钒钛矿护炉、压力灌浆、炉外喷水、精心操作、维持高炉顺行等措施,保证了高炉安全生产。     

略钢3号高炉内衬的破损状况与修复

对略钢3号高炉内衬的破损状况与修复进行了总结。3号高炉生产仅4年半,内衬就出现严重破损,炉缸侧壁径向侵蚀最深处达到610咖,炉腹至炉身下部径向侵蚀最深处约456mm。为此,采用炉缸整体浇注技术对炉缸进行了修复,采用湿法喷注技术对炉腹以上部位进行了内衬再造。认为炉缸整体浇注技术,能快速有效地实现炉缸陶瓷杯恢复和铁口修复,以及替代风口组合砖。炉缸及炉腹以上部位内衬修复后,高炉运行稳定,生产指标逐步改善,达到了预期目的。     

宝钢高炉长寿生产实践与探讨

在宝钢高炉生产30多年的过程中,既有2号高炉(1代)一代炉龄15年2个月和3号高炉(1代)一代炉龄18年11个月的长寿佳绩,也有4号高炉(1代)因炉缸原因仅生产9年4个月就停炉进行大修的实例。通过对宝钢4座高炉炉身、炉缸设计的演变过程和长寿维护实践的分析,重点对2号高炉大修改造的炉体冷却形式、炉缸配置、设计施工,以及操作维护进行了探讨。认为高炉长寿是一项系统工程,初始于高炉设计、关键部位耐材质量和施工质量,重在合理的日常操作和稳定的炉况,以及长寿管理制度的具体落实。     

太钢4号高炉晚期特护实践

太钢4号高炉由于采取了重视原燃料质量、强化高炉操作管理，减少炉况的波动、添加钒铁矿、安装小型平冷板等护炉措施，使4号高炉在特护期间炉况基本稳定顺利，技术指标良好，并于2000年9月13日实现了顺利停炉。     

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。     

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。     

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.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.