METHOD FOR SMOOTHING LUMP MATERIAL IN METAL IRON PRODUCTION

摘要

A method for producing a single layer in which a lump material fed onto hearth is not stacked and is kept in a single layer without causing problems that the lump material is damaged or an atmosphere conditioning agent laid in layers on the hearth is scratched off by a smoothing machine, and feeding density of the lump material per unit area of the hearth can be enhanced. When metal iron is produced by feeding a lump material containing a carbonaceous reducing agent and iron oxide onto an atmosphere conditioning agent containing a coal material spread all over the hearth of a moving bed type reduction melting furnace, smoothing the lump material by a smoothing machine and then reduction melting the iron oxide, the smoothing machine has a rotary shaft substantially parallel with the hearth face, and a rotary member provided with a plurality of protrusion on the surface of the smoothing machine. The rotary member of the smoothing machine is rotated on the rotary shaft in the direction opposite to the moving direction of the hearth. The protrusions are brought into collision with the lump material being fed while stacking in order to make smooth the lump material. The smoothing operation is performed while the protrusions is kept in noncontact with the lump material in the lowermost layer.