冷轧连退炉炉辊结瘤原因分析及控制措施

介绍新钢冷轧连续退火炉炉辊结瘤的形貌特点,对炉辊的粘附型结瘤、反应型结瘤的形成机理及产生原因进行分析,采取相应的控制措施后炉辊结瘤现象得到了有效控制.     

涟钢镀锌退火炉炉辊结瘤原因分析及预防

本文针对涟钢镀锌线的炉辊结瘤现象,结合涟钢镀锌退火炉特点和NOF炉理论,通过分析涟钢镀锌退火炉的过钢速度、板温、NOF段氧含量、露点等实时监测数据,找到了退火炉RTF段炉辊结瘤现象的产生原因,提出了一系列炉辊结瘤的预防措施。     

密闭立式连续退火炉辊结瘤原因分析与控制措施

结合安钢1 550 mm冷轧-连退机组设备及生产概况,论述了密闭立式连退炉内炉辊结瘤的产生原因,并提出控制措施和方法。通过控制炉温、减少张力、跟踪露点控制炉内气氛、在线/离线磨辊等措施有效减少了炉辊结瘤情况,提高了成品带钢表面质量。     

热处理中厚板辊印分析及解决实践

在辊底式热处理炉生产中,研究了炉底辊结瘤物产生原因及组成,明确了热处理中厚板辊印产生机理,提出高温纤维复合炉底辊彻底解决钢板辊印的实践经验,得出了高温纤维炉底辊表面不氧化、不烧结、不结瘤,高温状态下硬度低于钢板的硬度,有效解决了钢板表面质量问题,且承耐磨性好,结构强度高,急冷热性能好,能适应辊底炉进出料端为开口式生产模式。     

带钢热处理炉辊结瘤分析及对策

阐述了带钢热处理退火炉炉辊结瘤的原因,分析认为防止带钢打滑和涂层是解决炉辊结瘤的有效手段,同时针对高强板MnO结瘤进行了论证,并提出了DPC74涂层是防止该种结瘤的一种有效手段。     

辊底式热处理炉辊面结瘤分析与对策

分析了热处理炉辊面结瘤产生的原因,并提出提高抛丸质量、杜绝丸粒带入炉内、改善炉内气氛控制、合理安排装炉顺序等措施,可使辊面结瘤问题得到有效控制。     

硅钢连退炉炉底辊结瘤影响因素及控制措施

通过理论分析和现场试验,分析了连退炉炉底辊结瘤产生的影响因素。在生产中,通过减少铁皮带入,控制炉内的气氛、露点及主要工艺段温度,减少炉内张力和在线磨辊等措施,能够有效减少炉底辊结瘤的发生。     

辊底式热处理炉辊面结瘤原因分析与控制

针对辊底式热处理炉辊面结瘤产生原因进行分析,认为辊面结瘤是由于钢板表面热轧氧化铁皮或边部火焰切割留渣在高温下黏附在辊面上并经碾压、累积、叠加而形成。通过更换炉辊、加强钢板入炉前检查、改善抛丸效果、控制炉内气氛、制定合理的作业计划以及通炉制度,使辊面结瘤问题得到有效控制。     

电工钢退火炉陶瓷辊结瘤原因分析及改进措施

分析了宝钢1550电工钢连续退火涂层机组退火炉陶瓷辊结瘤的原因是带钢表面的氧化物颗粒和铁屑带入炉内,在高温还原性气氛下和陶瓷辊的辊面相互作用,并在其它各种因素的影响下产生的.针对结瘤的机制采取了相应措施,有效地解决了陶瓷辊结瘤问题.     

连续退火机组碳套辊结瘤原因分析及查找方法

对碳套辊结瘤原因进行了原因分析,分析结果表明:碳套辊表面凹坑为结瘤提供了附着位置;粉尘、残油残铁、氧化铁皮等为碳套辊结瘤的主要原料;通过调整炉内气氛、监控清洗段电导率、刷辊电流等措施有效降低了碳套辊结瘤发生,通过差速法可快速锁定结瘤范围.     

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.     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

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)