转炉氧枪喷头热负荷及冷却分析

利用商业软件FLUENT对传统氧枪喷头铜体及其冷却水内部流场进行了流固耦合数值模拟,发现传统氧枪喷头内冷却水流道中存在着流动"死区",影响了喷头的冷却效果.为了防止喷头变形或烧坏,提出在传统的氧枪喷头结构基础上另加若干条流线型导流筋的改进方案,并对新结构氧枪喷头的冷却效果进行模拟分析,获得了具有旋转流动的冷却水流场分布,同时增加了冷却水的湍流强度,因此强化了喷头的冷却效果.同传统氧枪喷头的冷却效果进行比较,发现改进后喷头端面整体温度平均下降达10℃,从而可大幅提高氧枪喷头的使用寿命.

Numerical Analysis of Heat Loadings on Oxygen Lance Tip in Converter

A numerical fluid-solid coupling simulation was done with the commercial software FLUENT for the copper tip of conventional oxygen lance and the flow field in the cooling water passing through the lance tip. It was found that some dead zones are in the cooling water flow passage within the lance tip, thus affecting the effect of cooling. To prevent the lance tip from deformation or burn-out, several streamline rib deflectors are added to the original lance tip. Then, the effect of the new construction of lance tip cooling process was analyzed simulatively, and the vector distribution of swirling cooling water flow field was obtained with increasing turbulence intensity and enhanced cooling effect of oxygen lance tip. Comparing with the conventional oxygen lance tip, the temperature of end face of the new oxygen lance tip decreases by 10°C, i.e., the service life of lance tip will be prolonged considerably.