Physical Simulation of Powder Spraying at the Bottom of a Converter

Abstract

Herein, a converter model is established to study the powder spraying process. The effects of powder spraying speed, solid–gas ratio, particle size, and powder spraying position on the distribution of powder in a molten bath and the molten iron splash on a liquid surface are quantitatively studied by using image technology. Increasing the carrier gas flow to 2 m3 h−1 can effectively promote the movement and mixing of the powder in the molten bath, but at the same time, this leads to a degree of splash of 50.61% above the molten bath. A similar situation occurs with increasing solid–gas ratio and decreasing particle size. However, as the powder injection position is gradually moved away from the center of the furnace bottom, the powder distribution before 3 s is more advantageous, and the degree of splash decreases from 25.39 to 12.40%.

Effect of Gas Distribution Mode on Bath Stirring and Mixing in a Bottom‐Blown Converter

“…Recently, the bottom blowing coupled with powder injection for converter steelmaking has attracted more attention due to its excellent dephosphorization performance and increase of charged scrap ratio. [ 6,7 ] Hence, worldwide scholars have conducted numerous research on bottom blowing for converter steelmaking. According to previous investigations, physical and numerical simulations were applied to study the effect of blowing parameters (gas flowrate, nozzle number, and configurations) on bath stirring and mixing behavior.…”