承钢2500m3高炉布袋除尘系统改进后的工作状态

 经过技术改进和生产实践,承钢各高炉煤气除尘系统完成了湿法向干法除尘的转变。其中2500m3高炉干法除尘系统取消了重力除尘器,采用单一布袋除尘器进行除尘工作,成功实现了炼铁技术的一次重大突破。研究表明,承钢高炉取消重力除尘器后,进入布袋除尘器煤气中大颗粒增多,使得布袋除尘效率提高;布袋进出口压差减小,煤气通过布袋除尘器的压力损失降低;布袋煤气入口温度提高。     

高炉煤气布袋除尘温度控制与滤布选择

1.概述高炉煤气的布袋除尘最突出的优点有两条,一是节约用水,二是避免湿法除尘过程中产生的大量有害废水造成的二次污染。高炉煤气的布袋除尘一般工艺流程如图1所示。高炉煤气先经重力除尘,除去较大的颗粒后,进入布袋除尘器。布袋除尘器由箱体和装在箱体内的圆筒形滤袋组成。过滤     

韶钢750m^3高炉煤气全干式布袋除尘

介绍了国内外高炉煤气布袋除尘的发展及国内高炉煤气布袋除尘的技术现状，分析了国内高炉煤气布袋除尘存在的主要问题并提出了改进措施，同时对韶钢750m^3高炉煤气全干式布袋除尘系统作了详细介绍。     

高炉煤气干式布袋除尘工艺设计的问题探讨

高炉煤气干法布袋除尘技术具有节水、节电、环保等优点。文章以越南550 m3高炉煤气布袋除尘工程设计为例,对高炉煤气干法布袋除尘技术进行了分析及探讨。     

八钢380m^3高炉煤气除尘系统调查分析

八一钢铁公司炼铁分公司高炉分厂共有380m^3高炉6座,0^#-4^#高炉的煤气除尘采用湿法除尘工艺,高炉产生的荒煤气通过重力除尘、一二文串联除尘,然后汇总到半净煤气总管再进入三座电除尘塔进行精除尘,成为净煤气,向各个用户输送。5^#高炉的煤气除尘采用干法布袋除尘工艺。     

大型高炉纯干法布袋除尘技术的研究

介绍干法布袋除尘技术在钢铁企业的应用情况,对比干法布袋除尘与湿法除尘的优点,分析了制约纯干式布袋除尘技术在大高型高炉应用的关键问题,提出了大型高炉除尘技术的发展方向.     

高炉煤气布袋除尘技术的发展与展望

通过对中型高炉煤气布袋除尘系统的设计参数、技术要点、设备选型等问题进行分析,总结了中型高炉煤气全干式布袋除尘技术的应用情况.并对大型高炉采用全干式布袋除尘技术提出了一些设计思路,认为该技术在大型高炉上具有良好应用前景.     

布袋除尘与文氏管除尘在锰铁高炉生产中的对比分析

叙述了锰铁高炉采用文氏管除尘和布袋除尘的工艺特点并分析对比了两种工艺对高炉生产的影响,结果表明,布袋除尘替代文氏管除尘在工艺上是可行的,除尘效果较好,净煤气含尘量≤10mg／m^3,对高炉生产指标有积极的促进作用。     

8号高炉除尘箱体设计分析

高炉煤气采用干法布袋除尘技术具有除尘效率高、投资省、占地面积少、减少二次污染等特点。柳钢自1994年4号高炉设计采用干法布袋除尘以来，逐步完成了全部高炉干法布袋除尘改造，并且使该项技术逐步得到进步、扩展、完善。以除尘箱而言，由最初的一座高     

高炉煤气布袋除尘工艺的应用实践与探讨

结合涟钢高炉使用干法布袋除尘工艺的实践,阐述高炉煤气布袋除尘的工艺设备和操作特点,分析和探讨其存在的问题和今后的发展方向。     

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。     

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。     

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.