Development of a Visual Information Technique of Nonstationary Fluctuations in a Blast Furnace Process

Formation of Vertically Inverse Pressure Distribution Due to Packing Structure of Near Wall Region of Blast Furnace

“…Muneyuki KAMATA, 1) Kenji KUMAGAI, 2) Hideki KAWAI, 3) Jun SUZUKI, 3) Jun-ichiro YAGI, 4) Shinroku MATSUZAKI 5) and Hiroshi NOGAMI 6) * 1) Department of Mechanical, Aerospace and Materials Engineering, Muroran Institute of Technology, 27-1, Mizumoto, Muroran, 050-8585 Japan.…”

“…The sensors settled on the furnace wall permanently and continuously measure pressure and temperature in near wall region inside the blast furnace. Recently a system which visualizes temperature and pressure on the wall of the blast furnace as 2-dimensional map was developed [1][2][3][4] and utilized in actual operations. Even in such system, obtained information is limited within the region vicinity to the wall.…”

“…Inverse pressure distribution is one of such peculiar pressure distributions that are related to operation instability. 3,[5][6][7][8] In the packed bed, the pressure drop occurs when the gas flows through the bed. Thus the pressure in the bed is higher in upstream and lower in downstream.…”

“…It is reported that the void space without packed particles is formed when hanging or channeling occur in the blast furnace. 3,5,8) The equation of motion for the gas flow in such void space can be simplified as following equation with the assumptions of no flow resistance of packed bed and little effect of viscosity.…”