Multiphase modeling of fluid dynamic in ladle steel operations under non-isothermal conditions

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Journal of Iron and Steel Research(International) Pub Date : 2017-09-01 DOI:10.1016/S1006-706X(17)30131-0
H. Gonzalez , J.A. Ramos-Banderas , E. Torres-Alonso , G. Solorio-Diaz , C.A. Hernández-Bocanegra
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引用次数: 7

Abstract

A numerical simulation was performed to study the flow pattern, mixing time and open-eye slag produced by argon gas injection in an industrial scale steel ladle under non-isothermal conditions. The liquid steel remains 5 min before the injection, and thermal stratification and convective flows were analyzed. Three different sequences in stages employing various argon-gas flow rates were simulated. In the first case, a sequence with the highest flow rates of argon was applied, while in the second and the third sequences, the intermediate and the lowest flow rates of argon gas were used, respectively. For determining the chemistry homogenization, the mixing time was computed and analyzed in all three cases. It was found that the cold steel is located near the walls while the steel with a high temperature is accumulated in the center of the ladle above the argon-gas tuyere. The higher and lower flows promote a faster chemistry homogenization owing to the secondary recirculations that are developed closer to the walls. The results from steel temperature drop show a good concordance with plant trial measurements.

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非等温条件下钢包作业流体动力学的多相模拟
对非等温条件下工业规模钢包内喷氩气产生的流态、混合时间和开眼渣进行了数值模拟研究。钢液在喷射前停留5 min,分析了热分层和对流流动。模拟了不同氩气流速下的3个不同层序阶段。在第一种情况下,使用氩气流量最大的序列,在第二和第三种情况下,分别使用中间和最低氩气流量。为了确定化学均质性,计算并分析了三种情况下的混合时间。结果表明,冷钢集中在钢包壁附近,而高温钢集中在氩气风口上方钢包中心。较高和较低的流量促进了更快的化学均质化,因为二次再循环在靠近壁面的地方发展。钢的温度下降结果与工厂试验结果吻合较好。
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CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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