共查询到19条相似文献,搜索用时 62 毫秒
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本文介绍了电磁搅拌和电磁制动技术在连铸生产中的应用情况及其效果,提出了在我国钢厂连铸生产中采用电磁搅拌和电磁制动技术的有关建议。 相似文献
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介绍了铝合金电磁搅拌器的结构和工作原理,分析比较了电磁搅拌技术的优点。电磁搅拌技术是高效、节能、环保、先进的铝合金熔炼搅拌技术,它的应用将对企业产生良好的经济效益和社会效益。 相似文献
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《钢铁冶炼》2013,40(9):675-682
A three-dimensional mathematical model of mould electromagnetic stirring (M-EMS) was established. Based on Maxwell's equations, the continuity equation and the momentum equation, the distribution characteristics of electromagnetic and flow fields with M-EMS were numerically simulated by the finite element software ANSYS and the finite volume software CFX. The influence of M-EMS on electromagnetic and flow fields was examined, and the process parameters of M-EMS were optimised by industrial plant trials. By the model verification, there was a good agreement between the calculated results and the measured data. The results indicate that the tangential electromagnetic force increases with the increasing current intensity, and increases at first and then decreases with the increasing current frequency. The tangential velocity increases with the increasing current intensity and current frequency (2–6?Hz). According to statistical results of the centre equiaxial crystal proportion and the macroscopic defects of round billet for different process parameters in industrial plant trials, the optimal process parameters of the M-EMS are as follows: the current intensity is 400?A, and the current frequency is 2?Hz. 相似文献
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电磁搅拌器在电解铝液混合炉上的应用 总被引:1,自引:1,他引:1
介绍目前国际最先进的铝合金熔炼搅拌技术及电磁搅拌器的工作原理,通过所取得的显著效果,进一步说明电磁搅拌技术是一项已被广为采用、可对电解铝液进行有效搅拌的技术。 相似文献
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钢的软接触电磁连铸技术的研究进展 总被引:1,自引:0,他引:1
钢的软接触电磁连铸技术(SoftContactElectromagneticContinuousCasting)是利用高频交变电磁场在结晶器内铸坯初始凝固区施加电磁压力来减少钢液与结晶器壁的接触压力,从而减小结晶器振动对铸坯表面质量的影响,降低拉坯阻力和减弱初始凝固点的传热来提高铸坯表面质量。分析了实现钢的软接触电磁连铸在结晶器结构、材质以及电磁场参数等方面需要解决的问题,并介绍了该技术的最新研究成果:高频调幅磁场及无结晶器振动的电磁连铸技术。 相似文献
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Induction heating (IH) electromagnetic field has a significant positive effect on the uniform temperature distribution in tundishes and decreases molten steel superheat to improve the quality of billets in continuous casting. To achieve the effect of electromagnetic force and Joule heating for molten steel in a channel-type IH tundish, a magnetohydrodynamic model is developed and validated by industrial experiment data. The molten steel in the tundish channel has a rotating velocity under the off-centre electromagnetic force. Its flow pattern consists of two contra-rotating vortices close to the outlet zone of the channels. The upper and lower vortices in the tundish channel change with time. The temperature distribution in the cross-sections is almost stable, and the maximum temperature increases by 30.1°C. Molten steel runs upward after flowing past the tundish channel, whose density decreases because of IH. The upward motion changes when the electromagnetic force acts on the molten steel. Results reveal that electromagnetic force has a significant effect on the flow of molten steel in the tundish, and that flow pattern varies in the tundish with or without electromagnetic force under Joule heating. 相似文献