물 모델 및 시뮬레이션 모델을 통한 점도성 유체 내 방울의 분산 거동 해석

Abstract

Improving the quality of steel products in the steelmaking process is an important issue. To solve this problem, a study of metal emulsions was carried out. It is well known that the metal emulsion means that the metal droplets in the slag phase are dispersed through the bottom flue and that the quality and productivity of the steel products can be improved by increasing the reaction area and reactivity between the slag and the molten iron. The velocity of metal droplets produced by the metal emulsion greatly affects process reactivity and productivity, and its descending velocity is affected by size, physical properties and fluid flow. Particularly, in the case of a fine metal droplet, it migrates and stays in the slag phase, resulting in loss of metal and deterioration of productivity. In this study, the water model was used to investigate the behavior and velocity of the droplet. The descending velocity was measured in the static state by changing the viscosity of the fluid. In addition, a lower pump was installed to measure the descending / rising speed of the fluid, and the flow rate of the fluid was measured through the PIV test. In addition, the angle and velocity of the droplet were measured in accordance with the descending behavior of the droplet. A simulated model was developed to reflect the measured variables. The droplet descendimg velocity was consistent with the calculated results in static and fluid conditions. Through this model, the properties of the metal emulsion were analyzed by changing the physical properties.