氧气复吹操作制度下废钢熔化特点的水模型实验研究

WATER MODEL STUDY ON THE FEATURE OF SCRAP MELTING IN THE OXYGEN TOP-BOTTOM COMBINED BLOWING PROCESS

本文在实验室条件下,通过水力学模型对实际转炉炼钢过程进行物理相似模拟,研究了在氧气复吹操作制度下,废钢熔化对熔池冷却效果的影响和规律。研究结果表明,废钢的厚度是决定废钢熔解速度的主要因素。其中,轻型废钢的熔解速度快,冷却作用时间短;重型废钢的冷却作用在吹炼中、后期方能显示出来;另外,复吹下的底气搅拌可加速废钢的熔解,强化废钢在前期对熔池的冷却作用。

In this paper, the effect of scrap melting on the temperature of bath has been studied by water model experiments physically simulating to the oxygen top-bottom combined blowing process. The results show that the melting rate of scrap depends principally on its thickness. The light scrap melts faster and the temperature of the bath is heavily affected at the ini tial stage; however, in the intermediate and final period, the temperature of the bath is markedly influenced by the melting of heavy scrap. In the oxygen top-bottom combined blowing process, inert gas stirring makes the scrap melt more quicker, and the effect of cooling on the bath more remarkable at the initial stage.