Mechanism of the Formation of Slag Particles by the Rotary Cylinder Atomization

Abstract

Slag is a potential resource of energy and materials because it contains a lot of elements and is at the high temperature of around 1500°C when exhausted.In the previous study, we developed a rotary cylinder atomizing (RCLA) method that can efficiently use the rotation energy for atomizing the molten slag. The minimum diameter of the slag particle was from 10 to 50% of the nozzle diameter. The obtained slag particles were amorphous spheres with high aspect ratios. The higher rotation speed and smaller nozzle diameter could make smaller particles. In the present study, the mechanism of slag particle formation from spouting slag string through the nozzle was investigated using the high-speed camera and the theoretical approach was performed.The slag was string-shaped when spouted from the nozzle. The relationship between the particle diameter (d) and nozzle diameter (2a) was derived as follows: