| 摘要 |
Disclosed is a molten metal producing device capable of effectively preventing formation of scaffolds in metal material briquette layers and capable of reliably removing scaffolds even if scaffolds are formed. A packed-layer forming material (A) and metal material briquettes (B) are charged in this order from material charging chutes (4, 4) at either end portion (2, 2) of a stationary uninclined arc furnace in the width direction of the furnace so as to form material packed layers (12) each having a downslope inclined to lower portions of electrodes (5) disposed in a central region in the furnace width direction and metal material briquette layers (13) on the slopes, respectively. Molten iron is produced by sequentially melting lower end portions of the metal material briquette layers (13) by arc heating at the electrodes (5). At the same time, an oxygen containing gas (C) is blown from secondary combustion burners (6) in a ceiling portion (1) so as to cause the combustion of a CO containing gas generated from the metal material briquette layers (13) while the metal material briquette layers (13) descend along the slopes of the material packed layers (12), and the metal material briquette layers (13) are heated by the radiant heat of the combustion. Shock generating devices (18) are disposed above a molten slag layer (15) and below surfaces of the metal material briquette layers (13) inside the furnace. |
