顶吹两相流影响熔池搅拌效果的水模型实验研究

摘要

The stirring effect experiment of immersion top-blowing into molten bath in slag cleaning furnace was conducted for ISA smelting system. A scaled down water model platform of the bath was designed and built. A three top-blowing combination regimen was determined with an optimum range of immersion depth calculated from actual production data. Experimental conditions were the same as actual production,such as gas holdup and injection speed. The experiment studied the impact of single spray gun immersion depth on stirring effect,and compared photos and experimental results under different conditions. When top-blowing immersion depth was about 1/2—2/3 of the slag layer thickness,two-phase mixing injection was optimum,and stirring effect in the bath was also optimum. The stirring radius of two-phase flow in the bath was greater. Application to actual production saved above 8%fuel quantity of single spray gun.%主要针对艾萨熔炼体系中贫化电炉的浸没式油气混合顶吹喷枪对熔池的搅拌效果影响进行实验。设计并搭建了一定相似比的贫化电炉水模型平台，通过计算所得的最佳深度范围设计三喷枪混合顶吹组合实验方案。在其他实验条件，如气含率、喷吹速度等与实际生产相似的前提下，实验研究改变喷枪插入深度对搅拌效果的影响，并对各条件下的实验现象及拍摄照片进行对比。实验结果表明：当顶吹喷枪插入深度为渣层厚度的1/2～2/3时，两相流混合喷射对熔池的搅拌效果最佳，并应用于贫化电炉实际生产，取得了单枪8%以上的节油量。