太钢4号高炉喷煤系统改造

太钢4号高炉喷吹系统原设计为双系列多支管喷吹方式,喷吹系统改造时改为总管加分配器喷吹方式,操作上由原来的两个系列同时喷煤改为两个系列交替喷煤。改造取得了较好的效果,喷煤量由70～80kg/t提高到100kg/t以上,压缩空气消耗量降低了90％,喷吹浓度由原来的6～10kg粉/kg气提高到40kg粉/kg气以上。     

苏钢高炉喷煤技术进步

苏钢高炉于1994年1月开始采用高压喷煤技术。以此为界,第一阶段从1966～1993年为常压喷煤,喷煤量仅为40～50kg/t铁左右。第二阶段从1994年至今为高压喷煤,目前喷煤量已达80kg/t铁以上,2＃高炉已突破了100kg/t铁大关。实现了喷煤技术的进步。     

流态化喷煤工艺在莱钢750m3高炉上的应用

介绍了流态化喷煤工艺在高炉上的应用 ,该工艺更便于操作 ,输送浓度增高 ,有利于节能降耗和喷煤的均匀、稳定。平均输送浓度达到 96.6kg/m2 ,高炉喷煤比达到 15 0 kg/t,焦比降到 3 78kg/t,为高炉降成本发挥了重要作用     

沙钢5800m~3高炉的合理喷煤比分析

<正>高炉喷煤是炼铁系统降本增效的重要措施,提高喷煤量是各钢铁公司努力的目标。目前国内的宝钢、太钢等企业实现长期保持在180 kg/t以上的喷煤比,取得了良好的经济效益。但由于原料和操作等多方面的限制,国内多数高炉还不能达到180kg/t以上的喷煤比。宝钢和日本的君津3号和4号高炉都尝试过200 kg/t以上的喷煤比,但并没有长期实现高喷煤比操作,君津3号高炉在喷煤比达到190 kg/t时,置换比大幅降低。沙钢5800m3高炉开炉至今,运行状况良     

低品位条件下钒钛磁铁矿高喷煤比冶炼实践

介绍了攀枝花钢钒公司1#高炉的原料结构以及在低品位钒钛磁铁矿冶炼条件下高喷煤比的生产实践。为了提高喷煤比、降低焦比,采取添加煤粉助燃剂、单枪喷煤改造为双枪喷煤、提高混合煤中高挥发分烟煤比例、提高风温和改善煤粉粒度等措施;同时,高炉采用提高鼓风动能、增加理论燃烧温度、增加矿石平台宽度稳定煤气流、减少炉温波动范围、保持适宜的造渣制度,从而改善喷吹煤粉燃烧性和提高高炉喷煤比。2014年一季度在入炉品位49.35%的条件下,喷煤比154.29 kg/t,焦比降低到421 kg/t;2014年4月在入炉品位49.32%的条件下,喷煤比164.47 kg/t,焦比降低到417 kg/t。     

首钢京唐5500m~3高炉富氧喷煤实践

对首钢京唐5500m~3高炉富氧喷煤实践进行了总结。简要阐述了富氧喷煤对高炉冶炼过程的影响,阐明了京唐高炉采用鼓风富氧和氧煤枪富氧这两种富氧方式的冶炼特点,重点阐述了富氧喷煤技术在京唐高炉上的应用效果。京唐两座高炉平均富氧率5.6%(其中氧煤枪富氧0.7%),煤比基本在170kg/t。京唐高炉富氧喷煤后,产量维持在较高水平,利用系数在2.3以上,焦比300kg/t。     

莱钢1000m3高炉喷煤系统设计特点及生产实践

介绍了莱钢两座1000m 3高炉喷煤系统的设计特点和顺利投产后迅速达产达效的情况。喷煤系统工程采用短工艺流程、循环利用高炉废气、整体流化上出料、仓流化装料方式等多项先进技术。通过喷煤设备技术改造,优化高炉操作,强化冶炼,短时间内实现了高炉利用系数2.8t/m 3.d以上和最低入炉焦比315kg/t。     

攀钢高炉喷煤制粉及喷吹工艺的改进

通过对喷煤工艺的改进和完善,喷煤工艺生产能力取得较大突破,平均喷煤量已达20t/h以上,全年平均煤比已达到130kg/t,远远超过了原设计能力,具备了煤比达150kg/t喷吹能力.     

邯钢1000m~3高炉提高喷煤比的探索

邯钢4#高炉(有效容积1000m3)经过不断探索,加强原燃料管理、高炉的操作和维护,使喷煤比逐月提高、焦比和综合焦比不断下降。喷煤比由2008年的130.6kg/t提高到2009年6月的163.1kg/t,焦比由361kg/t下降到了305kg/t,综合焦比由524kg/t下降到了500kg/t,取得了良好的经济效益。     

天铁高炉喷煤系统改造

天铁高炉喷煤系统随着高炉扩容改造、富氧喷吹和风温水平的提高,喷煤能力不能满足生产需要,从2004年开始对现有的喷煤系统进行了双系列技术改造,使喷煤技术水平得到了全面提升,煤比达到了155kg/t·Fe,并具备了200kg/t·Fe的喷吹能力和烟煤无烟煤混合喷吹的条件。     

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.