Floating/Sinking of Deadman and Liquid Flow Behavior in Blast Furnace Hearth

摘要

The warm water model experiment that assumed the blast furnace hearth has been performed, and the liquid flow and the heat transfer property have been examined. The experimental result was considered using the calculation based on the mathematical model, and the flow and the heat transfer of a real furnace were presumed. Not the furnace bottom upheaval but the deadman low permeability did strengthen circulating flow near the sidewall. Measures for floating or sinking of the deadman in an actual blast furnace were evaluated from the balance between solid load and buoyancy. In some cases a negative correlation was found between the calculated sinking depth and the center temperature of furnace bottom with some time delay. It was considered that when a deadman behaves in a specific manner, it may affect the temperature of furnace bottom through the liquid flow in the hearth region. From the consideration of period and spatial distribution of temperature rise, it was estimated that flows of molten iron which move in the hearth toward tapholes are the cause of the sidewall temperature rise.