| 摘要 |
PURPOSE:To grasp accurately the distribution of the gaseous flow in the furnace by measuring the deposition condition of the charge in a blast furnace right after charging basing on the fact that the shape of the deposition formed by said charge in the furnace is varied in accordance with the distribution of the gaseous flow in the furnace. CONSTITUTION:The temp. T and components of the gas on the surface of the charge in the port of a blast furnace are measured and the density rhof of the gas is calculated from the furnace top pressure Pr determined from operating conditions. The speed Umf of the gas for beginning fluidization of the charge is calculated from the density rhof of the gas and the grain size Dp and density rhob of the charge determined by the test on the outside of the furnace. On the other hand, the deposition shape of the charge in the port of the furnace is separately measured and the inclination angle theta at each measuring point is calculated from said shape, then theta/theta0 is calculated from the inclination angle theta0 of the charge in the absence of wind determined by the test outside of the furnace. The value U/Umf with respect to theta/theta0is read from the graph, and the flow speed U of the gas in the furnace with respect to the inclination angle is determined by said value. |
