Study on Vibration of Middle Leg in The MIDREX Shaft Furnace

In the present study, the vibration of the middle leg in MIDREX shaft furnace in Gol-Gohar Iron and Steel Development company (GISDCO) has been investigated to detect the cause of vibration. For this aim, field data-collection was performed to determine the events which influence the vibration in the MIDREX shaft furnace. The effects of material flow and shocks in product-cooler and furnace were studied. The direct influenceof shocks in the furnace and product cooler on the leg vibration was rejected by detailed data analyses. However data analyses was showed that the shocks in the product cooler matched in ۰۵ most cases with the leg vibration initiation. More precise analyses revealed that the material flow actuated the leg vibration. The shocks indirectly actuated vibration by creating a sudden blank space at the top of the product cooler which led to the opening of the leg outlet and starting the material flow. The load interaction between the flow material and the leg body behaved as an actuating force for the leg vibration.

کلیدواژه ها:

Middle Leg Vibration ، Midrex Shaft Furnace ، Material Flow ، DRI