【作者】 于建河；

【导师】 杜钢；

【作者基本信息】 东北大学 ， 材料工程， 2008， 硕士

【摘要】 LF炉是以电弧加热、氩气搅拌和渣精炼为核心的钢包精炼炉生产技术,可以冶炼高质量的钢种,LF炉精炼技术近年来在我国发展很快。目前对LF炉的有关研究主要集中在两方面,即：LF炉钢包底吹氩数模的研究；精炼渣及精炼工艺优化的研究。根据通钢LF炉存在的问题,对LF炉工艺优化做了以下两方面的研究：根据通钢LF炉实际工艺参数,计算了不同吹氩流量；通过实验室的研究,以工业废渣为基料配制出了适应工艺的精炼渣基渣,并进行了现场试验。为通钢LF炉吹氩和精炼提出了优化工艺。主要结论如下：(1)流量和混匀时间呈双曲线变化的趋势,即随着流量的增加,混匀时间减少的程度降低；(2)精炼渣的熔点低,熔化速度快,脱硫效果好,同时使用精炼渣可以减少石灰的用量,缩短LF炉的冶炼周期；(3)加入铝渣后不仅使精炼渣的起弧埋弧效果得到了很大的改善,同时可以充分降低渣中(FeO)的含量,出钢过程中的一次脱硫率明显提高；(4)吹氩流量在110l/min左右渣面没有明显的裸露现象。这说明最大吹氩流量在110l/min是合适的；(5)该精炼渣的最佳碱度在2.0-2.5之间,最佳光学碱度在0.79-0.80之间,最佳渣指数MI值在0.27-0.45左右。更多还原

【Abstract】 Ladle Furnace(LF) is a ladle refining furnace production technology mainly based on heating, argon-blowing stirring and slag refining. This technology can make high-quality steel. So LF refining technology has developed rapidly in China in recent years. Currently, the study of LF is focused on two aspects:the research on the mathematical model of Argon-blowing at lable bottom; the study of refining slag and the optimization of refining process.According to some problems in a LF in Tonghuasteel, two aspects of the study about the optimization of LF technology were done as following:according to the actual process parameters about the LF furnace, the different argon flow were calculated; through laboratory research, the suitable refining slag, based on industrial waste residue, was prepared and tested.Main conclusions are as following:(1) Flow and mixing time has the trend of hyperbolic change, that is level of the mixing time reducing become lower with the gas rate increasing.(2) The refining slag has low melting point, melts rapidly, and has good ability of desulfurization. At the same time the amount of lime and the LF refining time can be reduced by using the refining slag.(3) By adding Aluminium bearing slag, the effects of started arc and submerged arc has been greatly improved, and the desulfurizing rate during tapping can be markedly improved by fully reducing the content of (FeO).(4) The phenomenon of the molten slag entrapment doesn’t occur when argon flow is at 110l/min, which shows that the biggest argon blowing rate is appropriate at 110l/min.(5) The best alkalinity of the refining slag is between 2.0 to 2.5, and the best optical alkalinity is between 0.79 to 0.80, and the value of the best slag index MI is around 0.27 to 0.45.更多还原