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电磁搅拌在连铸钢中的应用据"Cmaπb"1995年No.8P31报道,在连铸过程中采用电磁搅拌的实践经验表明,钢坯质量很大程度上取决于结晶线内钢水流动速度和钢坯液芯内搅拌范围的大小。本文是对采用传导式电磁搅拌时连铸坯液芯内流体动力现象的数学分析结果进... 相似文献
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日本神户制钢所,从日本钢管公司购进了一套与大方坯连铸设备配套的铸模内电磁搅拌装置。所谓电磁搅拌,是指在连铸过程中利用电磁力搅拌钢水,使坯件质地均匀,从而提高产品质量。采用电磁搅拌工艺,可以促进节能效果良好的连铸技术的发展,并能实现高级特殊钢的连铸(在此以前,高级特殊钢连铸极其困难)。铸模内电磁搅拌装置分电磁搅拌铸模、电磁线圈、电源三个部分。采用电磁搅拌,可以 相似文献
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针对板坯连铸过程中产生的连铸坏中心偏析内部缺陷较严重的问题,分析了产生连铸板坏中心偏析的成因,并提出了包括凝固末端动态轻压下、结晶器电磁搅拌、二冷动态控制、连铸拉速与钢水温度优化核心控制等核心技术。 相似文献
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分析帘线钢连铸过程中中心偏析的形成原理及对铸坯质量的影响。研究帘线钢连铸坯中心偏析的控制措施,包括连铸拉速与钢水温度优化控制、结晶器电磁搅拌、凝固末端轻压下、二冷动态控制等核心工艺技术。通过应用这些技术,帘线钢WLX72A和WLX82A连铸坯平均中心碳偏析指数分别控制在1.042和1.027,综合合格率达到99.97%。 相似文献
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《有色冶金设计与研究》2016,(2)
连铸电磁搅拌技术应用在铜管连铸生产中,是近年来的一种新兴工艺方法。分析了生产铜管的电磁搅拌技术原理、设备构成及技术特点,介绍了连铸电磁搅拌技术生产铜管的研究现状,并指出了未来连铸电磁搅拌技术生产铜管的发展方向。 相似文献
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浇铸生产的过程中,连铸技术比传统的浇铸方式更加具有优越性和经济性。随着我国科学技术的不断发展和进步,新的技术在连铸过程中得到推广和应用,如电磁技术。电磁技术主要包含有电磁搅拌、电磁制动、电磁软接触、电磁振荡以及电磁检测等。本文对连铸过程中电磁技术的应用进行分析,并且提出相应的发展前景,为电磁技术在连铸过程中的应用进行指导。 相似文献
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板坯连铸的电磁搅拌 总被引:1,自引:0,他引:1
S.Kunstreich 《钢铁》2005,40(9):81-82,86
回顾了电磁搅拌应用于扁平产品连铸生产中的各种形式,并按液态钢水流动形态和冶金效果给予分类。多模式电磁搅拌属于第三代结晶器搅拌技术,它将电磁搅拌的3种功能通过不同操作模式集成在一起,显著改善了产品质量和连铸机的性能。 相似文献
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国内外炼钢、连铸专利技术发展趋势 总被引:2,自引:0,他引:2
研究了2000年以来国内外炼钢、连铸技术专利,分析了铁水预处理、炉外精炼、中间包冶金、电磁搅拌、薄板坯连铸等专利技术的发展趋势。 相似文献
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Against the background of actual metallurgical equipment with linear electromagnetic stirring system,the study measures and analyzes the internal flow, the free surface shape and level fluctuation of liquid metal exposed to linear electromagnetic stirring with Doppler ultrasound velocimetry and laser liquid level apparatus respectively, and then desulphurization process with or without imposition of linear electromagnetic stirring is studied experimentally. The change of sulfur content of hot metal with respect to time is obtained, and the volume mass transfer coefficients corresponding to different stirring current is determined finally. The result shows that linear electromagnetic stirring can not only effectively promote the internal flow, but also effectively increase the level fluctuation so as to significantly improve the kinetic condition of liquid metal. The internal flow and level fluctuation of the liquid metal would increase in line with the increase of electromagnetic stirring intensity. The desulphurization experiments show that the linear electromagnetic stirring can significantly promote the desulphurization process of hot metal, and the technology has wide application prospect in promoting various slag-metal reaction. 相似文献
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目前,A356.2铝合金主流的生产工艺有人工搅拌+链式铸造和电磁搅拌+热顶铸造两种方式,通过对上述产品的取样,对比分析了化学成分、组织结构和物理性能等,得出电磁搅拌+热顶铸造工艺生产的产品质量在各个方面均优于人工搅拌+链式铸造生产工艺产品质量,是生产高质量A356.2铝合金产品的发展方向。 相似文献
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A number of electric arc furnace (EAF) plants in China use high proportions of hot metal in the charge because of availability of excess liquid iron at the steelworks and/or because of the high price of scrap relative to hot metal. Liquid steel costs are still higher than the basic oxygen furnace as the EAF is not as efficient when refining liquid iron. EAF combined blowing technology has been modelled and installed in industrial plants with the aim of increasing stirring and hence improving refining. The industrial application of the combined blowing technology in a number of steel plants indicates that the combined blowing technology of EAF can effectively improve the pool stirring strength and reaction dynamics condition of the molten pool, and optimise production. 相似文献
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《钢铁研究学报(英文版)》2016,(5):422-427
A new electromagnetic stirring technique that is driven by hydrodynamic forces was presented. This technique offers the following advantages. First,the stirrer can be immersed in the liquid metal,thereby significantly increasing the penetration depth of the electromagnetic forces and significantly improving the stirring efficiency; thus,this technique is particularly suitable for large-scale liquid metal. Second,under certain conditions,this technique can overcome difficulties that are encountered with traditional stirrers,such as accessing regions that are difficult to reach in working spaces with complex or narrow shapes. This stirrer also has a simpler structure than a traditional stirrer; thus,the design can be easily modified,and no external power supply is required. An experimental prototype was also presented for controlling the fluid flow rate,thereby controlling the electromagnetic force and velocity field of the driven liquid metal. The velocity distribution in a liquid Ga In Sn alloy under fluid-driven electromagnetic stirring was quantitatively measured using ultrasonic Doppler velocimetry( UDV). The primary results show that a remarkable velocity field has been achieved and that fluid-driven electromagnetic stirring is an effective means of stirring liquid metal. Finally,the potential applications of this technique in industry,along with key challenges,were discussed. 相似文献