2580m^3高炉布料制度调整实践

介绍了鞍钢2580m^3高炉调整布料制度的生产实践,分析了不同布料制度对高炉生产指标的影响,确定了采用＂抑制边缘、发展中心＂的布料制度。生产实践表明,调整布料制度后,高炉稳定运行。     

济钢2号高炉铁口90°布局条件下的操作改进

针对济钢2号高炉90°夹角铁口布局情况,进行了生产操作的改进。重点是改变其边缘煤气流的不均匀分布,使高炉煤气流分布趋于合理,从而减少煤气流对高炉生产的影响,保证了高炉长期稳定生产。     

首钢调整高炉煤气分布的生产实践

介绍了首钢调整高炉煤气分布思路“打开中心、稳定边缘”与“稳定中心、照顾边缘”的由来,根据高炉生产实际,提出了煤气分布的衡量标准。举例说明了在实际生产中针对不同高炉,通过对煤气分布形态的判断来调整高炉装料制度,实现了高炉煤气稳定分布。     

料床充填结构对高炉内气体流动的影响

用有限差分法对高炉内气体流动行为进行了数值解析，并系统地分析了不同料床结构对气体流动行为的影响。结果表明，Ｖ形层状料床横截面上气体的流速呈矩形波状分布。在高炉边缘加小粒焦炭可抑制边缘气流，可提高炉衬寿命。     

宝钢高炉炉身设计结构差异对煤气流分布影响

大型高炉边缘煤气流的稳定性和均匀性对高炉顺行影响较大,炉身结构直接影响上部炉料和气流分布。结合宝钢高炉生产实践和高炉炉身结构设计,探讨高炉不同炉身结构煤气流分布特点,以及炉身结构差异对煤气流影响原因;研究针对不同炉身结构的煤气流控制技术,探索优化高炉炉身结构设计对策,使高炉炉身设计结构与高炉下料和煤气流分布相协调。     

高炉无料钟参数对料流轨迹的影响

高炉炉料入炉其料面的落点分布受炉顶布料设备参数、操作参数以及煤气流的影响.在总结前人料流轨迹计算模型的基础上,考虑了科氏力及三个方向煤气曳力对炉料运动的影响,建立了料流轨迹数学模型.应用VC编写程序,计算并分析各参数对料流轨迹的影响,结果表明,科氏力对料流轨迹影响较大;径向煤气流由高炉中心流向边缘时,落点半径随粒径的增加而增大;煤气流由高炉边缘流向中心时,落点半径随粒径的增加而减小;小粒径焦炭和烧结矿受煤气流影响较大.     

新钢10#高炉稳定边缘气流操作实践

本文对新钢10号高炉稳定边缘气流操作实践进行了总结,通过采取控制合理的炉腹煤气指数、发展中心主导气流适当兼顾边缘等一系列措施,高炉煤气流得到了很好控制,煤气利用率得到提高,技术经济指标持续改善。     

新钢10号高炉边缘管道的成因及处理

针对新钢10号高炉边缘管道频繁的现象,通过采取提高炉温水平、发展中心主导气流适当兼顾边缘、调整风口布局等措施,高炉煤气流得到了很好控制,高炉实现稳定运行,煤气利用率得到提高,技术经济指标持续改善。     

再论装料制度的作用和选择

一、边缘发展的危害作者在《高炉布料规律—装料制度的作用和选择》一文中曾指出,不同装料制度的煤气分布,对高炉操作及炉衬寿命影响极大.定性比较见表1.     

炉腹角和炉身角对高炉煤气流分布的影响

维持合理的煤气流分布是高炉高效、低耗、稳定运行的关键。高炉气流分布不仅与原燃料质量、操作制度有关,还取决于炉型设计等先天因素,合理的炉型设计是获得合理气流分布的基础。基于传热学和流体力学基本原理,建立了高炉传热和煤气流流动数学模型,利用试验获得了模型的相关参数,通过数值模拟方法研究了炉腹角、炉身角以及等效炉腹角对高炉气流分布的影响。结果表明,减小炉腹角、增大炉身角有利于抑制边缘气流发展。调整等效炉腹角同样可以达到控制边缘气流的目的,但与改变炉腹角相比,其作用强度和作用范围更大,且最大影响区域也不相同。     

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。     

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。     

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.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.