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首页> 外文会议>European Oxygen Steelmaking Conference >( TOPIC 5)Practice in Improving Steel Liquid Cleanness by Ladle Slag Modifier
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( TOPIC 5)Practice in Improving Steel Liquid Cleanness by Ladle Slag Modifier

机译：（主题5）通过钢包渣改装改善钢液清洁

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Practice of improving cleanness of low carbon aluminum killed steel by modifying ladle slag was introduced. Low carbon aluminum killed steel was studied. Before modifying ladle slag and strengthening protective casting, the problem of nozzle clogging during continuous casting was very serious. In order to assure continuous casting heats, the flow rate of Argon which was used to blow nozzle and stopper must be increased, which was the key factor of slag entrapment and pores, and finally led to worsen slab quality. The treatment way which combined slag infiltration with slag modification was selected by comparing the metallurgical properties. Modifier was poured into ladle during tapping, and modifier acceleration was added well distributed after tapping. By this the oxidation of the ladle slag was controlled effectively and the cleanness of steel liquid was improved remarkably. Comparing to non-modifying, there were four characteristics at the experimentation. Firstly, the percentage of FeO&MnO in ladle slag which was no more than 5% were more than 80%. Secondly, there was no obvious mass gain of ladle. Thirdly, T(O) of steel liquid in tundish decreased extensively with the average value of 43ppm. Lastly, clogging of submerged entry nozzle at continuous casting was improved obviously. Based on this practice, we could conclude that the cleanliness of steel liquid should be controlled from the source, which was the root to improve quality. Reducing the thickness of slag layer in the ladle by controlling quantity of slag during tapping and then controlling the oxidation of top slag could obtain better result.
机译：介绍了改变钢包渣改善低碳铝杀钢清洁性的实践。研究了低碳铝杀死钢。在改变钢包炉渣和加强保护铸造之前，连续铸造期间喷嘴堵塞的问题非常严重。为了确保连续铸造热量，必须增加用于吹出喷嘴和塞子的氩气流速，这是矿渣夹紧和孔隙的关键因素，最终导致了恶化的板坯质量。通过比较冶金特性选择将炉渣渗透组合的处理方式。在攻丝期间，改性剂倒入钢包中，敲击后，在分布良好分布的改性剂加速度。由此，有效地控制钢包渣的氧化，并且显着改善了钢液的清洁度。与非修改相比，实验中有四种特征。首先，钢包渣中的Feo＆MnO百分比不超过5％的百分比超过80％。其次，钢包没有明显的质量增加。第三，中间包中的钢液体的T（O）随着43ppm的平均值而显着降低。最后，在连续铸造时浸没进入喷嘴的堵塞明显提高。基于这种做法，我们可以得出结论，钢液的清洁应由源来控制，这是改善质量的根源。通过控制炉渣期间的炉渣量减小钢包中的渣层的厚度，然后控制顶渣的氧化可以获得更好的结果。

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