唐钢3号高炉炉缸冷却水系统的改造

对唐钢3号高炉炉缸冷却水系统改造的经验进行了总结.通过对炉缸冷却水系统进行改造,加强冷却,减缓了炉缸侵蚀,3号高炉技术经济指标有了较大改善,效果显著.     

宝钢2号高炉炉缸侧壁侵蚀原因及控制实践

通过分析宝钢2号高炉炉缸侧壁温度屡次升高的原因和操作实践的总结,证实铁水环流加剧是大型高炉炉缸侧壁侵蚀的主要原因.通过在正常生产中实施活跃炉缸操作、强化中心气流、控制炉底温度下降和加强铁口维护等操作方法,2号高炉成功地解决了炉缸侧壁侵蚀难题,效果显著.同时表明,加钛矿对维护炉底作用显著,而对控制侧壁侵蚀效果不大.     

安钢高炉炉缸侧壁温度升高综合治理技术

对安钢高炉炉缸侧壁温度升高综合治理技术进行了总结。7号高炉(450m~3)炉缸侧壁温度异常升高后,过采取提高炉缸部位冷却强度、调整高炉操作参数、加强炉前操作管理,以及钛护炉等措施,炉缸侧壁温度升高点渐下降到正常范围之内,并形成了安钢高炉炉缸侧壁温度综合治理技术。1号高炉(2200 m~3)炉缸侧壁温度异常高期间,应用了安钢高炉炉缸侧壁温度综合治理技术,使1号高炉炉缸侧壁温度异常升高得到了有效治理,较快地复到了正常生产。     

大型高炉合理炉缸冷却制度

合理的炉缸冷却制度是保证大型高炉长寿的基础,不同冷却制度对高炉炉缸的温度分布和侵蚀状况具有直接影响.结合某4000 m3级高炉,根据传热学理论建立了高炉炉缸、炉底温度场物理模型和数学模型,通过数值模拟对"大水量、小温差"和"小水量、大温差"这两种不同炉缸冷却制度进行了研究,分析了不同冷却制度对炉缸温度场、炉缸侵蚀状况及高炉寿命的影响.结果表明,在炉役初期砖衬较厚时,不同冷却制度对炉内温度分布的影响区别不大;随着砖衬的不断减薄,不同冷却制度对炉内温度分布的影响逐渐明显;当砖衬侵蚀到一定程度后,再好的冷却也无济于事,但采用"大水量、小温差"并加强冷却可以减缓砖衬的侵蚀,延长高炉寿命.      

唐钢2560m^3高炉炉底、炉缸侵蚀状况及机理

通过分析唐钢2560m3高炉大修时炉底、炉缸侵蚀状况,结合该高炉实际运行情况,探讨了炉底、炉缸的侵蚀机理,并为新建高炉提出了减缓炉缸、炉底侵蚀的相关措施.     

汉钢2 280m~3高炉使用加长风口套生产实践

汉钢2 280 m~3高炉为解决炉缸侧壁温度升高、原燃料质量差、炉缸不活、关键经济技术指标差状况,通过更换加长风口套,优化高炉操作制度,强化精料管理,加强炉前出铁和高炉操作等,活跃了炉缸,有效降低了炉缸侧壁温度、提升了高炉关键经济技术指标,在兼顾生产的同时确保了高炉安全生产运行。     

武钢2号高炉炉缸炉底维护

随着冶炼的强化、炉顶压力的提高和低硅生铁冶炼,武钢2号高炉炉缸、炉底侵蚀加快,为此采取一系列维护炉缸、炉底的措施,同时妥善处理了高炉稳定顺行与维护炉缸、炉底之间的矛盾,既抑制了高炉炉缸、炉底的进一步加剧,同时高炉各项技术经济指标大幅度改善.     

武钢高炉炉缸炉底的现状和延长寿命的措施

本文以武钢高炉历次破损调查和生产状况为基础,对各高炉炉缸炉底的现状进行分析,从而提出延长炉缸炉底寿命的主要措施:(1)强化冷却;(2)增加死铁层高度;(3)使用钒钛矿护炉;(4)加强高炉日常操作维护.     

高炉炉缸活性的分析探讨

高炉安全长寿、降低高炉能源消耗成为现代高炉技术发展的主要方向,而其关键在于提高高炉炉缸活性.在介绍高炉炉缸活性变差特征的基础上,从高炉上部调剂、下部调剂、渣铁物性、高炉原燃料性能等方面,就如何提高高炉炉缸活性进行了分析和探讨.     

提高大型高炉炉缸寿命的探讨

结合宝钢高炉生产实践,重点探讨了大型高炉炉缸长寿的措施.以传热分析为基础,探讨了炉缸耐材的侵蚀机理及影响因素,认为炉缸耐材及冷却系统的合理选择是提高炉缸寿命的关键,并提出了高炉大型化后减缓炉缸侵蚀的措施.     

Laudatio: Prof. Dr. med. Dr. phil. Dres. h. c. Heinz H?fner

During the course of a year, there are many healthcare workers nationwide who sustain sharps injuries whilst carrying out their duties. Staff who work in the Accident and Emergency (A & E) units are no different from anyone else in this respect. The emotional cost of such an accident cannot be calculated, whereas the financial costs can. This article aims to show how the cost of an injury to a member of staff can be calculated, thus allowing a manager to assess the financial implications of sharps injuries to their department. In the absence of access to an Occupational Health (OH) department, most A & E units have to respond to sharps injuries to healthcare workers in the hospital. This task must be attended to by the medical staff as well as the nursing staff of the A & E unit. Within the following text the appropriate responses and methods to ensure uniformity of response are discussed. The tables and the calculation figures shown are taken directly from the information held in the St James's University Hospital Trust's OH department. All calculations are based on the middle band of the salary scale for each discipline. Accurate costings for each member of staff injured cannot be shown in this article, but the general principle is laid down and can be easily followed for any situation.     

1969 C.P.A. Institute.

Presents the program for the C.P.A. Institute entitled "The Role of Counseling Services on the Contemporary Campus." The Institute was held on June 2-3, 1969. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Rats, Man . . .

Comments on the article by Richter entitled "Rats, Man, and the Welfare State" (see record 1960-02810-001). The commenter notes that in his article Richter did not indicate how hereditary and environmental factors were controlled. In comparing the hereditary survival characteristics of wild versus domesticated rats, it would be essential that the environmental influences on the survival characteristics of the wild rats should be ruled out. Another factor to be considered is that the wild state may offer a diet and other environmental influences, which in the life of a single individual would produce organic changes, accounting for some of the differences between wild and domestic rats. It would seem that the most effective way to determine the hereditary differences between wild and domestic rats would be to create a wild group, composed solely of the offspring of wild rats. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The blood-brain barrier. I. Histology. Physiology. Embryology. Transport

The concept of blood-brain barrier (bbb) arose in the beginning of the 20th century after report that the dyes injected intravenously did not appear in the brain. The idea and definition of bbb has been changed many times since then. We present current opinion concerning bbb, its histology, embryology, ultrastructure and function on the ground of a review of the recent literature.