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Study of High Efficiency Refining Reactor through Mixing and Separation Character of Vortex Stirrer

涡流搅拌器混合分离特性高效精炼反应器的研究

基本信息

批准号：
15560645
负责人：
YOKOYA Shinichiro
金额：
$ 2.37万
依托单位：
Nippon Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560645/
关键词：
efficient mixing vortex stirrer swirling flow annular impinging flow potential energy wettability angle of funnel 位置エネルギ渦流式撹拌器

项目摘要

The is a strong demand for innovation of steel-making processes, because the preservation of global-environment, energy and resource saving as well as productivity cost and quality on steel are important issues for sustainable-development of steel industry. Without imparting artificial energy, vortex stirrer using only a gravitational energy is invented. In order to generate the swirling flow effectively and to maintain stably, the swirling flow of mercury or water in the funnel has been observed, and the effect of the funnel angle and wettability on the swirling flow has been investigated, and studied. Obtained results are as follows :The refining reagents can be completely sucked into the hot metal through the vortex effect.The tangential velocity decreases inversely with increasing radially the distance from the free surface.When the funnel angle is 30° against the horizontal surface, the swirling flow is affected by the wet ability of the funnel.When the wettability between the funnel and liquid is poor, the stable swirling flow cannot be obtained because of the slip of the liquid on the inner-surface of the funnel.A model calculation for molten iron has also been conducted on the effect of the wettability on the swirling flow.

保护全球环境、节约能源和资源、提高钢铁生产率、降低成本和提高质量是钢铁工业可持续发展的重要问题，因此，钢铁生产工艺的创新是钢铁工业可持续发展的迫切需求。发明了一种在不施加人工能量的情况下，仅利用重力能的涡旋搅拌器。为了有效地产生旋流并保持稳定，对汞或水在漏斗中的旋流进行了观测，研究了漏斗角度和润湿性对旋流的影响。结果表明：通过涡流效应，精炼剂可以被完全吸入铁水中;切向速度随径向距离自由液面的增加而减小;当漏斗与水平面夹角为30°时，旋流受漏斗润湿能力的影响;当漏斗与液体之间的润湿性较差时，液体在漏斗内表面上的滑移会导致旋流不能稳定;并对润湿性对旋流的影响进行了铁水模型计算。