E. N. Maksaev, M. I. Elovenkov, A. V. Kosonogov, V. V. Kislitsa, A. A. Korostelev
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引用次数: 0
Abstract
The development of the beyond-design productivity of a thin-slab CC machine has revealed abnormalities in the performance of a submerged entry nozzle. They are characterized by the mechanical failure of the refractory wall around the pony ladle attachment fitting. As established by the tests, the failure is caused by induced mechanical vibrations affecting the horizontal axis. Their occurrence has to do with the formation of hydrodynamic flux cycles in the molten metal of the crucible. These cycles transmit a sign-variable pulse to the submerged refractory body. It is established that the nozzle vibration frequency is similar to the crucible swinging frequency. An efficient solution for stabilizing the mechanical durability of the refractory was to enhance the configuration of the pouring nozzle in the pony ladle attachment fitting. This modification has improved the refractory item resistance to the hydrodynamic effects of the molten metal and allows continuing to increase the productivity of continuous thin-slab casting.
摘要 薄板 CC 设备的超设计生产率的发展揭示了浸没式入口喷嘴的性能异常。其特征是小钢包连接配件周围的耐火壁出现机械故障。试验表明，故障是由影响水平轴的诱导机械振动引起的。其发生与坩埚熔融金属中形成的流体动力通量循环有关。这些循环向浸没的耐火体传递符号可变的脉冲。喷嘴的振动频率与坩埚的摆动频率相似。稳定耐火材料机械耐久性的有效解决方案是改进小钢包附件中浇注喷嘴的结构。这一改进提高了耐火材料对熔融金属流体动力影响的抵抗力，并可继续提高薄板连铸的生产率。
期刊介绍：
Steel in Translation is a journal that represents a selection of translated articles from two Russian metallurgical journals: Stal’ and Izvestiya Vysshikh Uchebnykh Zavedenii. Chernaya Metallurgiya . Steel in Translation covers new developments in blast furnaces, steelmaking, rolled products, tubes, and metal manufacturing as well as unconventional methods of metallurgy and conservation of resources. Papers in materials science and relevant commercial applications make up a considerable portion of the journal’s contents. There is an emphasis on metal quality and cost effectiveness of metal production and treatment.
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