宝钢1号高炉炉墙结厚的处理

宝钢1号高炉（第3代）达产、达标、达效后由于多种原因导致炉墙结厚多次,并对高炉生产造成了较大负面影响,炉墙结厚后主要采取了发展边缘气流、热洗炉和调整冷却制度等措施。详细介绍了宝钢1号高炉（第3代）炉墙结厚的征兆、原因及处理方法。     

武钢铜冷却壁高炉炉墙结厚原因分析

对铜冷却壁在武钢大型高炉的应用情况进行了阐述。选取8号高炉为代表，对武钢铜冷却壁高炉炉墙结厚的过程进行跟踪分析，找出炉墙结厚的原因，并提出防止炉墙结厚、维护铜冷却壁高炉操作炉型的对策措施。边缘气流长期不足、操作制度未能适应入炉料结构变化、渣皮脱落后操作不合理是武钢铜冷却壁高炉炉墙结厚的主要原因。须通过十字测温和炉身热负荷管理办法，控制适宜的边缘气流，入炉料结构发生变化后要进行针对性调整，渣皮脱落后的煤气流控制要遵循疏通中心引导边缘的原则，才能从根源上消除铜冷却壁炉墙结厚现象，保持铜冷却壁高炉良好的操作炉型。     

八钢2＃高炉炉墙结厚及处理

八钢2＃高炉炉墙结厚分析,总结处理过程,操作上过分追求强化冶炼,设备故障造成无计划休风,冷却强度不合理导致炉墙结厚,通过开放边缘煤气流,调整布料,调整冷却强度等措施。     

安钢2号高炉处理炉墙结厚实践

对安钢2号高炉处理炉墙结厚实践进行了总结。认为碱金属负荷大幅超标及焦炭质量下滑是造成炉墙结厚的主要原因,通过采取调整布料矩阵、疏松边缘气流、热洗炉等方法,使炉墙黏结物脱落,炉况恢复正常。     

武钢1号高炉炉墙结厚处理

对武钢1号高炉炉墙结厚的原因进行分析,发现冷却设备严重漏水、入炉原料质量差以及调剂措施不到位是导致高炉炉墙结厚的主要原因。采用发展边缘煤气流、提高炉温水平、降低炉渣碱度、控制冷却强度、改善入炉原料质量、加净焦和锰矿洗炉等综合措施消除结厚,取得了较好的效果。     

邯钢5号高炉铜冷却壁生产实践

对高炉的上下部调剂、炉墙结厚处理进行了分析,提出了铜冷却壁高炉维护合理操作炉型的方法,认为加强入炉原燃料的管理,减少成份波动,降低入炉粉末含最,通过上下部调剂维持适当的边缘气流及选择合适的热制度、造渣制度是炉况稳定顺行的关键.     

邯钢5号高炉铜冷却壁生产实践

结合邯钢5号高炉炉墙结厚的处理,总结了铜冷却壁高炉维护合理操作炉型的经验.认为加强入炉原燃料的管理,减少成分波动,降低入炉粉末含量,通过上下部调剂维持适当的边缘煤气流,以及选择合适的热制度、造渣制度是炉况稳定顺行的关键.     

二号高炉炉况失常的分析与处理

二号炉2007年1月5日夜班开始，高炉出现偏尺、管道、滑料，煤气流紊乱。通过分析，白班采取了调轻负荷、降压减风、轻边缘处理炉墙结厚，中班积极检查并切断了冷却系统漏水，找到了炉况失常的主要原因，避免产生炉凉的危险事故。     

3号高炉(二代)炉墙结厚与操作炉型的管理

宝钢3号高炉(二代)炉体采用铜冷却壁,开炉两年后首次发生炉墙结厚,由于结厚处理时间长、炉况波动大,严重影响生产。分析认为,冷却壁镶砖的不均匀侵蚀是造成本次炉墙结厚处理困难的主要原因。对使用铜冷却壁的高炉在生产中如何控制操作炉型给出了建议。通过减少原料入炉粉末;稳定顺行,保持炉况稳定;防止边缘气流过重;提高软熔带位置;建立适宜的铜冷却壁冷却制度等可以防止炉墙结厚的发生。     

武钢1号高炉炉墙结厚的处理

对武钢1号高炉炉墙结厚的处理过程进行了总结。认为原燃料质量下降、高炉处于护炉生产状态、铜冷却壁冷却强度较大、INBA设备故障导致高炉经常憋炉是导致1号高炉炉墙结厚的主要原因。采用热洗炉和强烈发展边沿气流等措施,分三个阶段对炉墙结厚进行处理,20天后炉况彻底恢复正常,主要技术经济指标明显改善,利用系数提升至2.485,燃料比降至491.6 kg/t。     

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。     

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.     

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。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.