莱钢2#750m3高炉软水改造工程及系统切换

为延长冷却壁寿命 ,对莱钢 2 #75 0 m3高炉实施了软水改造工程。并在高炉正常生产状态下 ,成功实施了汽化冷却与软水密闭循环系统的安全切换。实践证明 ,软水系统运行良好 ,冷却壁进水平均温度 3 8.98℃ ,平均流量 115 0 m3/h,热负荷17.5 2 GJ,泄漏率小于 0 .18‰。     

冷却壁修复技术在安钢2200m3高炉上的实施

安钢2200m3高炉采用联合软水密闭循环系统,高炉投产后出现冷却壁漏水现象,经检漏分析,认为冷却壁漏水的主要部位在冷却壁进出水管与炉皮焊接处或冷却壁内铸管道上下部90°弯管处,通过采用向冷却壁铸管内注浆堵漏和穿金属软管的方法进行修复处理后,取得良好效果.     

包钢4150 m3高炉软水密闭循环冷却系统的控制

文章介绍了软水密闭循环冷却系统在包钢4 150 m3高炉的应用。该系统使高炉冷却系统实现全软水冷却,生产中通过冷却系统的温度、进出口流量、水温差、以及脱气膨胀罐的液位的合理控制、冷却壁热负荷变化对炉况进行判断,满足高炉强化冶炼的要求,并达到高炉长寿的目的。     

冷却壁穿管修复技术在6号高炉上的应用

分析了冷却壁破损的原因,通过实施穿管修复技术,6号高炉冷却壁恢复正常软水密闭循环。建议在柳钢高炉冷却系统检修时推广应用该技术。     

软水密闭冷却系统检漏和穿管恢复技术

介绍了2000m^3高炉冷却系统概况，以及软水密封循环系统出现的问题及采取的措施。分析高炉软水密闭系统本体检漏、冷却壁漏水处理方法。阐述冷却壁穿管恢复技术特点及成果。     

唐钢新1号炉冷却系统简介

唐钢新1号炉(3200m3)主要采用软水密闭循环冷却、铜冷却壁、炭砖-陶瓷杯复合炉缸,通过合理的冷却结构获得合理操作炉型,延长了炉衬工作能力和高炉的使用寿命。     

武钢5号高炉破损冷却壁的修复技术

为了延长高炉寿命，武钢5号高炉采用了软水密闭循环冷却系统，但软水密闭循环冷却系统破损冷却壁的修复一直是个技术难题，通过不断摸索，武钢5号高炉找到了一种让破损冷却壁重新恢复冷却的方法-再生法。再生法就是在破损冷却壁中穿金属软管，让破损冷却壁重新恢复冷却，对延长冷却壁寿命非常有效。     

高炉软水密闭循环冷却工艺分析及运行实践

介绍了八钢430m3高炉及2500m3高炉软水密闭循环的实际运行经验，目前国内软水密闭循环冷却工艺比较及设备发展趋势，提出更有利于高炉冷却系统稳定运行的建议。     

天钢3200m~3高炉综合长寿技术的特点

对天钢3200m~3高炉综合长寿技术的特点进行了总结。通过采用高炉本体冷却壁结构和铜冷却壁、炉底炉缸结构、软水密闭循环冷却系统、自动化检测系统等一系列技术,为天钢炼铁高炉的长寿命奠定了良好的基础。     

铜冷却壁应用经济性浅析

计算了铜冷却壁相对于铸铁冷却壁的投资增加额.列出了高炉应用铜冷却壁后发生变化的相关成本因素.以2 000m3高炉为例计算了大高炉应用铜冷却壁的主要效益.分析了300～600 m3小高炉使用铜冷却壁的经济可行性.得出的结论是,应用铜冷却壁不论对大高炉还是中小高炉都能产生良好的经济效益.     

论从实践理解世界的物质性和自然世界的先在性

马克思主义唯物论是一种物本主义形态的唯物论,还是一种超越物本主义形态、从实践理解世界的本质相关问题的实践的唯物主义的唯物论?这是一个我们必须搞清楚的有关马克思主义唯物论的本质规定性和精神实质的重大问题.在考察物本主义的唯物论及其思维方式的局限性的基础上,揭示了马克思主义唯物论是现代的、实践的唯物主义,并重点研讨了马克思主义唯物论关于从实践理解世界的物质性和自然世界的先在性的原理,以期为马克思主义唯物论进一步阐明人类世界的实践性原理奠定基础.     

Effect of cyproheptadine on the ultrastructure of the neurons of the arcuate nucleus in the hypothalamus of the rat

The data are presented on changes in the rat arcuate nuclear neuron ultrastructure after using cyproheptadine (peritol, Egyt Pharmaceutical Works, Hungary) in a water suspension at a dose of 20 mg/kg once daily during 7 successive days and twice a day within 10 days. It was shown that cyproheptadine decreases the functional activity of the arcuate nuclear neurons, depending on the total amount of the drug used. Cyproheptadine-induced inhibition of the forming neurohormone release from neurons is likely to be one of the mechanisms of its therapeutic effect in Itsenko-Cushing's disease.     

Characteristics of the sympathetic innervation of the nictitating membrane and of the vasculature of the nose and tongue of the cat

Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions.