| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rotary hearth type reducing furnace operating method for manufacturing reduced metal which is capable of minimizing the increase of the facility cost and the operation cost, preventing firm plate-like fixed matter from being built up on a hearth to facilitate the discharge of the fixed matter, preventing or reducing the wear of a blade tip of a screw of a discharging device, performing the continuous operation for a long time, and achieving high rate of operation. SOLUTION: Fixing suppressing agent is added in advance to agglomerate containing powder metal oxide and powder carbonaceous substance, and charged onto the hearth by a charging unit so that the fixing-suppressing agent is dispersed in the fixed matter formed on the hearth. When reduced iron is scraped outside the furnace by the discharging device, the fixed matter is scraped while applying the compression force at the same time, thus generating cracks in the fixed matter with the fixing suppressing agent as a starting point, and the fixed matter is peeled from the hearth while splitting into small pieces, and scraped out together with reduced iron.</p> |
