Modeling Study of Slag Emulsification During Ladle Change‐Over Using a Dissipative Ladle Shroud
Modeling Study of Slag Emulsification During Ladle Change‐Over Using a Dissipative Ladle Shroud
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DOI：
10.1002/srin.201500299
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发表时间：
2016-09
影响因子：
2.2
通讯作者：
S. Garcia-Hernandez;Rodolfo D. Morales;José de Jesús Barreto;Ismael Calderón-Ramos;Enif Gutiérrez
中科院分区：
文献类型：
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作者：
S. Garcia-Hernandez;Rodolfo D. Morales;José de Jesús Barreto;Ismael Calderón-Ramos;Enif Gutiérrez
研究工作的目的是研究一种新的钢包长水口概念和设计，以帮助减少钢包更换操作期间中间包中的炉渣乳化。为此，基于Froude相似准则，设计并构建了中间包模拟水模型；通过数学模拟对流动行为进行更深入的分析。采用自来水和硅油来模拟钢水和炉渣。模拟结果表明，使用传统的钢包长水口时，水输送时会带有过量的湍流动能，这些动能在中间包熔池内消散，产生强烈的混合流型并捕获大量的油。此外，在这种瞬态操作期间，传统护罩会导致油被拖入靠近入口体积的区域中的浴中，从而产生连续的油乳化。相比之下，所提出的钢包长水口在水进入中间包模型之前消散了湍流动能，从而促进了不太强烈的混合模式。另外，拖动区域也会消失；因此，油乳化量显着减少。因此，如果在钢水进入中间包之前使湍流动能消散，就可以减少炉渣乳化和炉渣开口面积。
The aim research work is to study a new ladle shroud concept and design to assist in the reduction of slag emulsification in the tundish during ladle change‐over operations. For this, a tundish analogue water model is designed and constructed based on Froude similarity criterion; a deeper analysis of the flow behavior is undertaken by mathematical simulation. Tap water and silicon oil are employed to simulate molten steel and slag. The modeling results show that using a conventional ladle shroud, the water is delivered with an excessive amount of turbulent kinetic energy which is dissipated inside the tundish bath, generating strong mixing flow patterns and entrapping a massive amount of oil. Furthermore, during this transient operation the conventional shroud induces oil dragging into the bath at zones next to the entry volume, producing continuous oil emulsification. In contrast, the proposed ladle shroud dissipates the turbulent kinetic energy before the water enters the tundish model, promoting less intense mixing patterns. Also, the dragging zone disappears; thus, the amount of oil emulsification is reduced significantly. Consequently, if the turbulent kinetic energy is dissipated before the steel enters the tundish, it will be possible to reduce the slag emulsification and the slag opening area.