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高炉炉身热负荷与冶炼关系的探讨 总被引:1,自引:0,他引:1
为了实现高炉高产、优质、低耗、长寿,不断提高经济效益,高炉工作者对维持合理的操作炉型日益重视。实践中发现,炉身热负荷能较准确地反映出炉型变化,并在一定程度上反映高炉内的冶炼过程,为操作者提供可靠的信息。本文在总结武钢3号高炉生产实践的基础上,初步探讨了不同条件下炉身热负荷变化特征,以及炉身热负荷与高炉冶炼的关系。 相似文献
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通过研究鞍钢2号和5号高炉炉体热负荷分布规律,提出了以低燃料比最佳操作炉型的热负荷分布为基准来计算当前操作炉型的热负荷分布偏差值Sr,实现了操作炉型的量化评估。鞍钢高炉应用实践表明:(1)炉体热负荷分布合理是操作炉型合理的关键,通过与低燃料比操作炉型的热负荷分布对比,能有效诊断当前操作炉型;(2)由炉腹至炉身热负荷,可以从各段热负荷的总值和分布两个维度进行评估;(3)鞍钢高炉理想的炉体热负荷分布分别为炉腹26%、炉腰12%、炉身下部0~6m为53%、炉身中部为9%。 相似文献
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七十年代以来,由于高炉不断大型化,以及采用了燃料喷吹、提高风温、提高炉顶压力等强化冶炼措施以后,炉身寿命显著缩短。为寻找其对策,国内外炼铁工作者对炉身砖衬破损原因及防止破损的有效措施进行了大量的分析研究。日本和苏联等国乘高炉解剖及大中修的机会,对炉身使用过的砖衬、附着物进行了分析研究。关于炉身下部砖衬应该选用何种材质,目前观点尚不统一,但多数人认为:对于热负荷较大的炉腹和炉身砖衬,应该选用耐碱性、耐磨损的 SiC 或 SiC- 相似文献
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倪志安 《Canadian Metallurgical Quarterly》2011,23(3)
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. 相似文献
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D. N. Reznikov 《Metallurgist》1962,6(12):535-537
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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. 相似文献
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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. 相似文献
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