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Effect of Top and Bottom Blowing Conditions on Spitting Phenomenon in the Converter

机译：顶部和底部吹风条件对转换器中吐痰现象的影响

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In oxygen steelmaking by the converter process, oxygen gas is blown from a top lance, and the carbon in the molten steel is removed. Oxygen gas is accelerated to supersonic speed in order to enhance mixing and metallurgical properties. In addition, the decarburization reaction includes formation and large expansion of the CO gas. To enhance converter productivity, increasing flow rate of top-blown oxygen, top blowing rate is often employed. However, when the top-blowing oxygen flow rate is increased, not only the momentum of the gas jet but also the generation of CO gas increases. From these facts, increasing the top-blowing gas flow rate causes an increase in spitting and bubble burst. Those phenomena eventually triggers deterioration of iron yield. In addition, the bottom-blown gas forms a plume, and the plume eye is exposed without cover slag.
机译：在通过转换器工艺的氧气制造过程中，氧气从顶部喷枪吹出，除去钢水中的碳。氧气加速到超音速速度，以增强混合和冶金性能。此外，脱碳反应包括形成和碳气的大膨胀。为了提高转换器生产率，通常采用越来越多的氧气流量的流速，吹动速率。然而，当吹出氧气流速增加时，不仅增加了气体喷射的动量，而且增加了CO气体的产生。从这些事实中，增加顶级吹气的气体流速导致吐痰和气泡爆发增加。这些现象最终触发了铁产量的恶化。此外，底部吹气形成羽流，并且羽毛眼睛暴露而没有盖子。

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