探讨首钢高炉长寿的途径

首钢2号高炉于2002年3月6日停炉大修，本代炉役为10年9个月，炉容产铁8277t/m^3，炉缸采用NMA砖砌筑是高炉既高产又长寿的主要原因。     

宣钢6号高炉大修改造及开炉生产实践

1 概述 宣钢6号高炉(302m~3)第五代炉役生产9年零10个月后,于2001年3月9日停炉大修,累计产生铁166 4895.8 t,单位炉容产铁量5512.9 t/m~3。经多方面考察论证,本次大修炉底炉缸采用烧成炭砖、模压小炭砖、自     

JL型漏斗式炉顶在济钢3号高炉的应用实践

济源钢铁厂3号高炉于1989年9月建成投产,1995年3月6日停炉大修,第一代炉龄5年零5个月。4月28日大修后开炉生产。高炉顺行,恢复很快,5月份即生产生铁5140t,6月份达到6704t,各项指标明显优于1号和2号高炉,也优于3号高炉大修前的指标。这次大修重点对上料、炉顶、高炉本     

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     

攀钢4#高炉第一代炉役成功实现了高效、长寿化生产

攀钢4 # 高炉第一代炉役于1989年9月2 5日开炉投产,有效容积135 0m3 ,于2 0 0 4年3月31日停炉大修,其间无中修生产14年6个月6天,炉役期间共产铁12 6 4 5 7万t,平均利用系数1 74 9t(m3 ·d) ,一代炉龄单位容积产铁936 7 17t/m3 。炉役期间进行过两次全喷涂,第一次于2 0 0 1年7月5日停炉休风10天16小时零3分,使用喷补料2 81t;2 0 0 2年12月2 1日高炉空料线至风口以下,停炉休风9天2 3小时37分钟再次进行风口以上全喷涂,用喷涂料345t。这一代炉役中,4 # 高炉的生产指标逐年提高,最高利用系数从投产时的1 6提高到2 3,特别是在1995年以后,高炉…     

萍钢2号高炉封炉复风操作实践

1 概况 萍钢2号高炉(350m~3)2000年8月在炉役后期封炉9天多,复风2天后炉况才恢复正常。而高炉大修后的2002年5月,因炼钢扩容封炉5天多,复风后炉况稳定,20h炉况便恢复到封炉前生产水平。由于2次封炉复风各方面情况差异大,有必要对2次封     

日本钢管京浜钢铁厂二座高炉近况

京浜钢铁厂,有二座容积各为4052m~3的大型高炉。1号高炉于1976年11月12日点火投产,2号高炉于1979年7月14日点火投产。1号高炉工作了12年9个月,于1989年7月14日停炉大修,一代炉役期总产量33,978,630吨(单位炉容产量8394t/m~3)。大修期间进行重大的技术改造,扩容与改为无钟炉顶等,总工期(从停炉最后一次铁到开炉出第一次铁)为137天,1989年11月28     

通钢4号高炉大修停炉操作与炉底侵蚀状况分析

通钢4号高炉(350m~3)1993年10月30日建成投产,采用自焙小炭块与自然风冷相结合的炉底结构。1997年10月4～27日停炉中修,更换炉顶设备和全部镶砖冷却壁。1999年5月因炉底温度高,在不休风的情况下将风冷改为水冷。2002年9月9日停炉大修,一代炉役8.79年,共产生铁267.4万t,单位炉容产铁7640.9t/m~3,高炉平均利用     

武钢4号高炉护炉经验

一、引言武钢4号高炉于1984年10月31日大修开炉进入第二炉役。大修后第26个月冷却器开始损坏;第30个月(1987年4月)炉腹炉腰冷却器大面积烧坏,炉壳多处过热发红,开裂。在中修前的20个月(至1988年12月10日停炉中修)期间,主要通过改进生产操作、加强炉体监测管理和富有成效的护炉技术措施,从而获得继续安全强化冶炼。1988年,高炉利用系数达到1.803吨/米~3·天,其他各项主要技术经济指标也达到较好水平。总结改进高炉生产操作和护炉技术,对延长高炉炉体寿命有着重大意义。     

首钢2号高炉长寿技术设计

首钢2号高炉有效容积1726m^3，于1991年5月15日扩容大修改造后投产。2002年3月该高炉停炉进行现代化新技术改造，于2003年5月23日送风投产。在首钢2号高炉长寿技术设计中采用了软水密闭循环冷却、铜冷却壁、热压炭砖、陶瓷垫等一系列高炉长寿技术，经过3年的生产实践，取得了显著的效果。     

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。     

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。     

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.     

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.     

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。     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.