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首页> 外文期刊>ISIJ international >Physical Model Study of Selective Slag Splashing in the BOF
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Physical Model Study of Selective Slag Splashing in the BOF

机译：转炉选择性溅渣的物理模型研究

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摘要

Steelmaking converter vessels do not usually wear evenly. Often, the higher wear rate in the trunnion area determines the lining life of the vessel. On the other hand, major skull growth may occur in other parts. In order to ensure consistent BOF performance, maintaining the vessel geometry by selective slag coating is important. Since selective slag splashing is difficult to perform by conventional oxygen lance, the effect of e.g. plugging one or two lance nozzles on the amount and direction of splashing was investigated by physical model experiments. Furthermore, the model was used to predict the influence of lance height, lance position, bottom blowing configuration and liquid viscosity on splashing behaviour. Lowering the lance increased the rate of splashing to a certain lance height beyond which it decreased. Similar behaviour was found to apply also to the slag wash coating mechanism. At low lance distance, plugging one lance nozzle increased the amount of splashing on charge pad and trunnion areas and decreased on slag hole side. Generally, bottom blowing increased the amount of slag drops considerably. Positioning of bottom stirring plugs had a clear effect on the direction of splashes.
机译：炼钢转炉容器通常磨损不均匀。通常，耳轴区域的较高磨损率决定了容器的衬里寿命。另一方面，主要的颅骨生长可能发生在其他部位。为了确保一致的BOF性能，通过选择性熔渣涂层来保持容器的几何形状很重要。由于常规的氧气喷枪很难进行选择性的炉渣飞溅，因此产生了诸如通过物理模型实验研究了堵塞一个或两个喷枪喷嘴的飞溅量和方向。此外，该模型还用于预测喷枪高度，喷枪位置，底部吹塑形态和液体粘度对飞溅行为的影响。降低喷枪，可以将喷溅速率提高到一定程度的喷枪高度，然后喷溅高度会降低。发现类似的行为也适用于渣洗涂层机制。在较低的喷枪距离处，堵塞一个喷枪喷嘴会增加装料板和耳轴区域的飞溅量，并减少渣孔一侧的飞溅。通常，底吹增加了矿渣滴的量。底部搅拌塞的位置对飞溅的方向有明显的影响。

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