板坯铸机粘结漏钢的成因及控制措施

本文针对板坯铸机频繁漏钢的突出问题,通过对生产数据进行统计分析,对板坯铸机粘结漏钢机理、保护渣变性等问题进行深入研究,最后总结出在没有结晶器专家系统情况下粘结和粘结漏钢事故的控制措施,并取得了良好效果。     

板坯结晶器粘结漏钢原因分析

针对承钢1 650mm板坯连铸机在生产初期存在粘结漏钢的现象,在无漏钢预报的条件下找出了粘结漏钢的主要原因,制定了详细措施,确保了生产的顺利进行。     

板坯漏钢原因分析及控制措施

重点分析了板坯连铸机粘结漏钢的形成机理及形成过程,结合提钒钢轧二厂生产实际情况,从操作方法、生产工艺及设备等几方面对板坯连铸机粘结漏钢的产生原因进行探讨和分析,并提出了一些预防措施和改进方法。     

板坯连铸机粘结漏钢与结晶器保护渣的关系

在板坯连铸机的漏钢事故中，粘结漏钢占的比例最大，粘结漏钢往往与所使用的结晶器保护渣有很大关系。结合鞍钢第三炼钢厂板坯连铸机多年来的生产实践，阐述了板坯连铸机粘结漏钢与结晶器保护渣的关系，并提出了一些防止漏钢的措施。     

50#钢板坯连铸机粘结漏钢原因探讨及解决措施

本文结合酒泉钢铁公司4#板坯生产实际,系统分析了50#钢粘结漏钢的原因,从保护渣、结晶器、冷却水以及工艺操作等方面有针对性地制定了措施,杜绝了粘结漏钢事故,稳定了生产。     

酒钢板坯连铸漏钢成因分析及预防措施

对于酒钢4号、5号板坯连铸机的主要产品Q235及低合金钢的生产,近几年由于操作、设备等因素造成较高的漏钢率,给生产和设备造成极大危害.分析了漏钢的原因,在无漏钢预警系统的前提下制定了针对粘结漏钢与裂纹漏钢的预防措施,使板坯漏钢率显著下降.     

韶钢第三炼钢厂板坯连铸生产实践

针对新投产板坯铸机生产中出现的Q345钢粘结漏钢频繁和包晶钢表面纵向裂纹多的状况,分析其原因,并采取相应措施,解决了粘结漏钢问题,提高了铸坯表面质量。     

45#钢板坯粘结漏钢原因探讨及解决措施

本文结合炼轧厂4#板坯连铸机生产实际,系统分析了45#钢粘结漏钢的原因,从保护渣、结晶器、冷却水以及工艺操作等方面有针对性地制定了措施,防止45#钢粘结漏钢,稳定了生产。     

板坯连铸粘结漏钢坯壳特征及结晶器铜板温度变化研究

为了研究板坯粘结漏钢的机理和预防粘结漏钢的发生,分析了粘结漏钢后凝固坯壳的厚度、裂纹形貌和表面振痕等特点,建立了初生凝固坯壳受力的数学模型,研究了正常生产及粘结漏钢前后结晶器热电偶温度变化规律.总结出粘结漏钢坯壳的典型特征,确立了保护渣性质、拉速、振动参数等对粘结的作用,得到粘结的热电偶温度变化特征,为漏钢预报系统的优化提供参考.     

板坯粘结漏钢原因与预防措施

天津钢铁集团有限公司3号板坯连铸机短时间内多次发生的漏钢事故,作者通过排除法分析出漏钢事故类型为粘结性漏钢。重点分析了发生粘结漏钢的原因,并对其他类型的漏钢机理进行简要介绍。针对3号板坯连铸机的工艺操作和设备精度调整等方面制定了详细的改进措施,实施后,天钢3号板坯连铸机发生漏钢的几率大大降低,降低了其对生产顺行的影响。     

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)     

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.