Effect of burden material size on blast furnace stockline profile of bell-less blast furnace

摘要

The position and profile of the burden stockline are important parameters for blast furnace (BF) control. Theoretical calculations currently determine the position without considering the influence of different sized materials. In order to clarify the effects of different sized materials on the position and compare experimental and theoretical calculated results, a 1/15 scale cold model consisting of an actual 2500 m~3 shaft and a bell-less top charging system has been built. The results indicate that; (i) the chute rotary speed strongly influences the stockline peak position with different sized materials; (ii) the rotary inclined angle and position of stockline peaks are approximately linear. Model predictions of the stockline with material size are poorly related to actual trial results, particularly chute rotary speed.