武钢1号高炉炉腹炉身破损调查

对武钢1号高炉炉腹炉身破损调查进行了分析总结。认为,炉腹冷却壁破损的主要原因在于所采用的球墨铸铁冷却壁性能欠佳,冷却壁镶砖选材和炉腹冷却壁结构设计不够合理;炉腰、炉身采用的铜冷却壁,在高炉生产10年后依旧保存完好,未出现严重的烧损,表明采用的铜冷却壁完全能够满足高炉长寿的要求。     

高炉风口以上冷却壁的选择

 高炉内部不同区域的环境存在差异,确定不同冷却壁在高炉内的合适安装位置,以延长冷却壁寿命,同时达到高炉长寿的目的,仍是设计师们应考虑的问题。以高炉炉内温度场为基础,从材料的导热性能、抗热冲击性能和耐磨性能3方面进行分析,提出了风口以上不同区域冷却壁的设计要求,并根据设计要求探讨了铜冷却壁和铸铁冷却壁的布置方式。研究结果表明,炉身中、上部应采用球墨铸铁冷却壁,炉腰、炉腹及炉身下部应采用铜冷却壁。     

根据能源条件的无料钟大高炉操作技术

川崎钢铁公司千叶厂6号高炉内容积4500m~3,有4个铁口、40个风口。高炉炉底水冷,炉缸喷水冷却,炉腹、炉腰和炉身冷却壁纯水冷却。高炉配备PW—IHI无钟     

高韧性球墨铸铁冷却壁研制成功

高炉炉身镶砖冷却壁对延长炉身寿命有特别重要的作用,是获得长寿高炉的关键设备。采用粘土砖的炉身转衬,一般在投产后半年左右,炉身中下部就被浸蚀光了,以后的几年全靠冷却壁维持生产。我国的高炉炉身寿命短,往往是冷却壁大量损坏漏水、被迫停炉检修。据武钢高炉的统计,灰铸铁镶     

安钢1号高炉长寿实践

1 概况 安钢1号高炉于1993年5月23日大修后点火开炉,炉底采用高铝砖,无冷却装置,设计寿命为4年,整体装备水平偏低。炉缸3层冷却壁为光面冷却壁,炉腹到炉身下部为镶砖冷却壁。高炉在强化冶炼3年后,炉底温     

2500m~3高炉本体设计分析

本设计包括2500m~3高炉本体炉型、炉衬、冷却设备和炉壳设计。同时,对所设计高炉本体特点进行简述。本高炉有效容积为2500m~3,高径比取值2.5,高炉利用系数取值2.25,炉缸炉底采用陶瓷杯结构,同时选用光面冷却壁,炉腹、炉腰及炉身采用镶砖冷却壁。     

试论强化冶炼高炉炉底结构长寿问题

一、引言自从用了碳砖炉底,炉底寿命显著提高,高炉长寿的矛盾由炉底转移到炉身。一代役龄中,往往需要中修(炉身更换内衬和冷却设施)1～3次,炉身寿命成了高炉工作者主攻对象。现在国外在对冷却器材质和结构、内衬砖材质、冷却介质和冷却系统、炉顶装料装置、操作等方面进行改进后,密集式冷却板或冷却壁结构的炉身均已取得十年以上寿命的成果。近几年来,通过国内高炉工作者的努力,炉身寿命也在不断增加。随着高炉的强化和产量的增加,高炉炉     

高炉铜冷却壁的技术进展

对高炉应用铜冷却壁的最新技术进展情况进行了总结,认为铜冷却壁应用于高炉炉腹、炉腰和炉身下部等高热负荷区域,是现代高炉的最佳炉体冷却方案。     

邯钢6号高炉炉役后期的维护与操作

1 概况 邯钢6号高炉有效容积380m~3,1个铁口,1个渣口,14个风口。采用料车上料,料钟布料。高炉冷却结构情况如下:炉缸为光面冷却壁;炉腹和炉腰为镶砖冷却壁;炉身一、二层也是镶砖冷却壁,但炉身三层和四层为带凸台的镶砖冷却壁。冷却壁材质均为普通铸     

包钢l~#高炉炉体破损调查报告

本文主要介绍包钢1~#高炉中修停炉时对高炉炉衬和冷却壁严重破损原因及有害元素在炉内纵向分布进行的调查.分析了包钢1513m~3级高炉,当炉腹冷却壁总破损率达到40%以上时,标志高炉进入中晚期工作,≥80%时,高炉一代中修寿命基本结束.另外,根据高炉炉身冷却壁解剖分析结果,对冷却壁破损原因,提出了延长冷却壁寿命的途径.     

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)     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.