| 摘要 |
PURPOSE:To effectively prevent the sticking of dust to a dispersion plate by making the dispersion plate the specific structure in a fluidized bed type pre- reduction furnace having the dispersion plate into which plural nozzle holes are penetrated in the inner part thereof. CONSTITUTION:In the attached figure, the mark 5 is the pre-reduction furnace main body and the mark 8 is the dispersion plate parting the inner part of furnace. A pre-reduction chamber 6 at the upper part of this dispersion plate 8 and a gas blowing chamber 7 at the lower part thereof, are constituted, respectively. In this gas blowing chamber 7, a gas blowing hole 9 is disposed and connected with a gas guiding tube 10 from a smelting reduction furnace. In the above-mentioned dispersion plate 8, plural nozzle holes 15 are penetrated to vertical direction. The dispersion plate 8 is constituted with a refractory-made main body 11, metal plate 12 disposed at the lower face of this body 11, metal pipes 16 fitted on the inner face of the above-mentioned each nozzle hole and cooling pipes 17 for flowing cooling fluid arranged along the vicinity of lower face of the main body 11. |
