提钒用旋流氧枪喷头的数值模拟

Numerical simulation of swirl-type lances in vanadium extraction process

利用Fluent软件模拟旋流氧枪的气体射流和提钒转炉内部的钢液流速,研究常规氧枪以及旋流角分别为5°、8°、10°和13°的旋流氧枪对熔池的搅拌效果和冲击特性.研究发现旋流氧枪射流分布相对分散,流股之间干扰少.增加熔池冲击面积,熔池内部等速线所包围的面积变大.10°旋流氧枪喷头喷吹时,等速线所包围面积最大,其面积约为熔池纵切面面积的75%,钢液的流动速度最大,有利于促进转炉提钒过程钒元素的扩散,从而提高提钒效率.

The gas jet of swirl-type oxygen lances and the liquid steel velocity in vanadium extraction converters were simulated using Fluent software. The stirring effects and impact characteristics of conventional oxygen lances and various swirl-type oxygen lances （ swirl angles of 5o, 8o, 10o and 13o） on the molten pool were studied on the basis of simulated results. It is found that the gas jet of swirl-type oxygen lances has a relative dispersed distribution and the flows have a less disturbance. When the injecting area of swirl-type oxygen lances increases, the area surrounded by isovelocity is larger in the molten pool. Injecting with the 10o swirl-type oxygen lance makes the area surrounded by isovelocity get the largest, about 75% of the longitudinal section of the molten pool, and the liquid steel velocity is the highest. This is helpful to promote vanadium dispersion in the vanadium extraction converter and improve the vana-dium extraction efficiency.