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首页> 外文期刊>ISIJ international >Kinetics of Silicon Transfer from Pulverized Coal Injected into Blast Furnace under Intensive Coal Injection
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Kinetics of Silicon Transfer from Pulverized Coal Injected into Blast Furnace under Intensive Coal Injection

机译：高强度喷吹下高炉喷吹煤粉中硅的迁移动力学

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摘要

With the progress of shifting to operation of intensive coal injection, Si in molten metal tends to increase, and this phenomenon cannot be explained by a conventional estimation model which does not distinguish between coke and pulverized coal on contribution to Si in molten metal. With respect to SiO gasification reactions from SiO_2 in pulverized coal, basic experiments were carried out on SiO(g) generation from pulverized coal char packed in a crucible under flow of reducing gas, and reaction rate was deduced with SiO_2 concentration in pulverized coal ash and slag composition taken into account. Furthermore, with respect to Si transfer in blast furnace, the SiO(g) generation rate derived from pulverized coal under intensive coal injection was evaluated and effects of pulverized coal on Si in molten metal were investigated. Consequently the molten metal [Si] variation associated with changes of pulverized coal brand in an actual furnace is become to be estimated.
机译：随着向强化注煤运转的发展，熔融金属中的Si趋于增加，并且这种现象不能用传统的估算模型来解释，该模型不能区分焦炭和煤粉对熔融金属中Si的贡献。关于粉煤中SiO_2的SiO气化反应，在还原气流下，对装在坩埚中的粉煤焦生成SiO（g）进行了基础实验，并根据粉煤灰中SiO_2的浓度推导了反应速率。炉渣成分考虑在内。此外，关于高炉中硅的转移，评估了在强喷煤条件下煤粉产生的SiO（g）生成速率，并研究了煤粉对熔融金属中硅的影响。因此，可以估计出与实际炉中的煤粉品牌变化有关的熔融金属[Si]变化。

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