Mechanism of Hanging Caused by Dust in a Shaft Furnace

Abstract

The mechanism of hanging caused by the dust in reducing gas in the reduction shaft furnace was investigated. Through experimental studies using a rectangler model and theoretical studies using a two dimensional mathematical simulation model, it was clarified that the dust in reducing gas sticked on the packed particles to form a dust blockade zone in front of tuyered and when the dust concentration of reducing gas was high or the descending velocity of packed bed was low, the dust blockade zone was expanded and the gas pressure drop was increased to cause hanging.