铁水预处理专用转炉的发展及技术可行性思考

针对铁水预处理工艺的发展状况，介绍铁水预处理专用转炉的流程，炉衬状况及武钢设立铁水预处理转炉的可行性。     

铁水预处理及转炉冶炼脱Ti实践分析

含有Ti的铁水对铁水预处理和转炉冶炼工艺均有不同程度的影响.为此,对含Ti铁水扒渣、脱Ti预处理及转炉冶炼等整个过程进行跟踪分析,从铁水分级扒渣、脱Ti预处理、转炉冶炼及出钢作业等方面提出了对含Ti铁水冶炼工艺的严格控制措施.     

利用转炉方式进行铁水预处理

新日铁公司室兰厂过去一直利用铁水罐车式铁水预处理方式进行脱硅、脱磷。这种铁水预处理工艺存在着预处理时间长、不能配合连铸工艺进行超前预处理、预处理能力低等缺点。室兰厂利用待机转炉作为预处理炉 ( 2座转炉体系 )进行研究得出 ,在转炉操作没有受到任何影响的情况下 ,这种转炉方式铁水预处理 (以下称为ＬＤ -ＯＲＰ)方法可实现铁水的高效预处理。室兰厂采用的ＬＤ -ＯＲＰ操作方法是 :同时启动两台转炉 ,其中一台进行脱硅、脱磷处理 ;另一台进行脱碳处理 ,即精炼炉进行分步操作的方法。ＬＤ -ＯＲＰ铁水预处理的工序是 :先将铁水倒…     

广钢铁水预处理脱硫工艺探讨

本文介绍了广钢目前的铁水质量状况对转炉冶炼带来的不利影响，阐述了铁水脱硫的意义，重点探讨了广钢铁水预处理脱硫工艺——喷镁脱硫的可行性。     

济钢KR铁水预处理工艺设计

为了与管线钢生产线相匹配,济钢120t转炉铁水预处理工艺选用KR技术,在入转炉的铁水罐中进行脱硫,选取活性石灰作为脱硫剂,铁水预处理周期为34～37min,可以与转炉生产匹配。     

铁水脱硅,脱磷及其对转炉冶炼的影响

对铁水预处理脱硅、脱磷及转炉冶炼进行了分析,着重论述了铁水预处理脱硅、脱磷对转炉冶炼操作的影响。     

新建钢厂铁水预处理模式的选择

通过对不同熔剂、不同处理方法的热力学计算比较得出最佳铁水预处理顺序为:预处理脱硫→预处理脱硅、脱磷.对不同处理容器、不同处理方法的动力学条件比较得出预处理容器应选定:铁水包KR脱硫,专用转炉脱硅、脱磷.对铁水预处理的操作成本进行比较分析得出:脱硅、脱磷应选择专用转炉同时进行,脱硫应选择KR(CaO作脱硫剂)法.新建钢厂最佳铁水预处理模式确定为:高炉铁水→铁水包KR(CaO作脱硫剂)法脱硫→专用转炉脱硅、脱磷.     

高硅铁水转炉吹炼实践

介绍了鞍钢股份有限公司鲅鱼圈钢铁分公司在铁水预处理工序对高硅铁水进行脱硅处理,在转炉工序使用高硅铁水进行转炉生产的实践。实践表明,在铁水预处理工序采用脱硅剂进行脱硅能有效降低铁水硅含量,在转炉工序通过调整操作制度,可以采用高硅铁水入转炉冶炼,实现了转炉和高炉生产同步。     

新一代大型钢厂高炉 转炉界面模式研究

高炉 转炉界面模式决定着整个钢厂的模式。对比分析了国内外钢铁企业的不同模式;选定新一代大型钢厂高炉 转炉界面模式为高炉铁水→铁水包承载、运输铁水→铁水包内KR脱硫→专用转炉脱硅、脱磷→脱碳升温转炉;从冶金动力学、热力学角度计算且对比了铁水预处理顺序、设备及方法;并结合预处理运行成本进一步验证了选定模式的合理性。     

新一代大型钢厂高炉 转炉界面模式研究

高炉 转炉界面模式决定着整个钢厂的模式。对比分析了国内外钢铁企业的不同模式;选定新一代大型钢厂高炉 转炉界面模式为高炉铁水→铁水包承载、运输铁水→铁水包内KR脱硫→专用转炉脱硅、脱磷→脱碳升温转炉;从冶金动力学、热力学角度计算且对比了铁水预处理顺序、设备及方法;并结合预处理运行成本进一步验证了选定模式的合理性。     

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.