高炉高喷煤率的实践

根据首钢1号高炉(576米~3)高喷煤量的生产实践,富氧4～5％,风温1100℃以上,当喷煤率月平均到45.2％(279公斤/吨铁)时,煤粉利用是充分的。文中讨论了煤粉的主要作用是取代风口碳;还讨论了高喷煤率时的操作条件;高喷煤率能延长冶炼周期,煤气利用显著改善;高喷煤率时应采用低灰分和低挥发分煤。     

马钢300m^3高炉大喷煤量实践

马钢３００ｍ＾３高炉使用料率约９０％的低钒钛矿冶炼。本文阐述了在入炉粉末约１６％、风温１０７０℃、平均富氧不足１％的条件下，实现高炉１２０￣１５０ｋｇ／ｔ大喷煤量冶炼的经验。     

提高重钢四高炉利用系数技术措施的探索

重钢四高炉通过采取精料、提高风温、富氧喷煤和提高顶压等技术措施以改善高炉冶炼条件。并维护好高炉合理的操作炉型,加强炉前渣铁排放,降低休慢风率。控制好高炉适宜的冶炼强度,达到了提高利用系数的目的。     

重钢四高炉提高利用系数的实践

通过采取精料、提高风温、富氧喷煤和提高项压等技术措施以改善高炉冶炼条件，并维护好高炉合理的操作炉型，加强炉前渣铁排放，降低休慢风率，控制好高炉适宜的冶炼强度，以达到提高高炉利用系数的目的。     

重钢1200m3高炉强化冶炼实践

对重钢5号高炉强化冶炼探索与实践的过程进行了总结分析。重钢5号高炉强化冶炼措施主要有：精料、提高风温、喷煤、富氧、控制适宜的风口前理论燃烧温度、优化上下部操作等。     

昆钢6号高炉强化冶炼生产实践

昆钢6号高炉投产3年来,通过改进喷煤系统,提高喷煤量,加强原燃料、设备和炉前管理,采用双预热技术提高风温,加强冷却系统管理等措施强化高炉冶炼;通过加强炉内操作管理,优化送风制度和装料制度,稳定料速,冶炼低硅生铁等措施优化高炉操作,高炉技术经济指标不断改善,2001年利用系数达2.040,焦比401 kg/t,煤比121 kg/t。     

高炉操作线在昆钢五高炉的运用

昆钢五高炉运用高炉操作线明确了降低焦比、深挖潜力的方向，采用提高风温、富氧量、喷煤量等技术手段强化操作，降低了消耗，提高了产能，同时提升了高炉冶炼水平，取得了较好的技术经济指标。     

高风温低燃料比高炉冶炼工艺技术的发展前景

分析了当前高炉炼铁技术面临的形势和挑战,提出了当代高炉炼铁技术的发展目标。阐述了高风温、富氧 喷煤对高炉炼铁的意义和作用。重点分析和论述了实现高风温和高富氧大喷煤的关键技术。提高风温、提高富氧 率、增加喷煤量是降低燃料消耗、节约生产成本和实现可持续发展的重要保障。在高风温、低燃料比冶炼条件下, 当代高炉炼铁技术具有广阔的发展前景。     

昆钢6号高炉强化冶炼生产实践

昆钢6号高炉投产3年来,通过改进喷煤系统,提高喷煤量,加强原燃料、设备和炉前管理,采用双预热技术提高风温,加强冷却系统管理等措施强化高炉冶炼;通过加强炉内操作管理,优化送风制度和装料制度,稳定料速,冶炼低硅生铁等措施优化高炉操作,高炉技术经济指标不断改善,2001年利用系数达2.040,焦比401 kg/t,煤比121kg/t.     

济钢2号高炉热风炉高风温燃烧技术的开发

1 2号高炉的风温现状 济钢第一炼铁厂目前有350m~3高炉6座。2号高炉配备4座热风炉,实行二烧二送工作制度,煤气未预热,空气预热到68℃。目前全厂高炉平均风温为1020～1030℃,而2号高炉风温仅为942～1006℃。风温低已成为降低焦比、提高喷煤量、提高高炉利用     

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.