发挥技术优势 提高风温水平

回顾梅山高炉第二代炉役的风温状况，重点介绍了３号高炉热风炉系统采用双预热热管换热器，四座热风炉变风量交叉并联送风等，使高炉的风温水平由１０５０℃提高到了１１００℃的情况。     

高炉热风炉采用的双预热技术

鞍钢新5号高炉2008年大修过程中,在热风炉系统采用了助燃空气、高炉煤气双预热技术。助燃空气预热是通过建2座卡普金式顶燃式预热炉来实现的,高炉煤气预热是通过在热风炉烟道上设置一台管式换热器回收烟气余热来实现的。这种双预热技术实现了在使用100%高炉煤气条件下达到风温1200℃的目标。     

大型高炉热风炉高效预热系统生产实践

鞍钢１１号高炉热风炉为提高风温采用附加加热换热系统高效预热技术,用单一的低热值高炉煤气,以燃烧炉和两台大型换热器相组合,该系统可把高炉煤气和助燃空气分别预热到２４０℃和２７０℃热风提高８０￣１００℃,同时,节省焦炉煤气,取得了显著的经济效益。     

大型双预热式热风炉设备安装

鞍钢10号高炉容积2580m3．是现代大型高炉之一．所配奋的4座AW2型外燃式热风炉．首次采用助燃空气及煤气双预热工艺．具有提高风温、节约能源等一系列优点。介绍其设备组成、安装与调试。     

5 100 m3高炉热风炉的设计

山东钢铁集团日照有限公司5 100 m~3高炉热风炉采用顶燃式,每座高炉配置四座热风炉,采用两烧两送的送风制度。热风炉采用高效陶瓷燃烧器,空气、煤气双预热,纯烧高炉煤气,风温可达1 300℃。     

本钢一号高炉热媒式余热回收装置的设计

热媒式余热回收装置可用于回收热风炉烟道废气中的显热来预热燃烧热风炉煤气及助燃空气,增加其物理热,从而提高理论燃烧温度,以提高热风温度,降低焦比. 热媒式余热回收装置于1979年底在日本问世,随后在短短几年内,已有10座大型高炉先后采用,同时运行效果良好,一般吨铁可节焦炭20～25公斤. 为本钢-铁厂-号高炉(炉容380米~2)设计的热媒式余热回收装置,目前正在施工不久即将投产.在目前风温900℃左右的情况下,当空气、煤气均被预热到120℃时,可使送风温度提高80℃,吨铁焦比降低约16公斤. 一、热媒式余热回收装置热媒式余热回收装置由换热器、热媒体、油泵、贮油罐及密闭压力循环管路组成. 平面布置及工艺流程见图1、2.     

高炉热风炉烟气余热回收技术的应用

为了提高风温水平，韶钢3号高炉热风炉采用整体式热管换热器对助燃空气进行预热，把风温提高到1100℃，工程投产后运行效果良好，经济效益与社会效益显著。     

高炉热风炉烟气余热的回收利用

为了提高风温,鄂钢4#高炉采用分离式热管换热器,利用热风炉烟气余热对助燃空气和高炉煤气进行预热。该系统投入使用后,风温提高近100℃,经济效益和社会效益显著。     

柳钢3号高炉热风炉水热媒换热系统通过鉴定

由鞍钢设计院和柳州钢铁厂共同研制开发的柳钢3号高炉(306m~3)热风炉水热媒换热系统于1689年9月建成并一次投产试验成功,经过一年多的运行实践,证明系统具有操作简便,运行稳定、安全可靠、维护工作量小、预热效果显著的特点,当废气温度在220～350℃时,助燃空气及煤气均可由25～35℃预热到140～160℃,风温提高80℃左     

鞍钢高风温长寿命内燃式热风炉的建设

鞍钢新1号高炉(3200m3)的3座热风炉和11号高炉(2580m3)4座热风炉中的3座均采用了DANILIE CORUS 公司的高风温长寿命内燃式热风炉技术,热风炉设计一代寿命25年,设计风温1200～1250℃.     

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.