| 摘要 |
<p>A smelting reduction apparatus and a method for producing molten pig iron are disclosed. Iron ore, sintered or pelletised iron are used, so that the discharge operation from a pre-reducing furnace (12) to a melter-gasifier (11) would not give any influence to the operation of the pre-reducing furnace (12). The apparatus consists of a pre-reducing furnace (12), a melter-gasifier (11), an ascending duct (13) for supplying the off-gas of the melter-gasifier (11) as a reducing gas to the pre-reducing furnace (12) via a cyclone (14), and a recycling duct (14a, 15a) for the fine ore separated at said cyclone (14) to be spouted through a melter-burner (16) into the melter-gasifier (11). A part of the reducing off-gas which has passed through said cyclone (14) is supplied through a ventury scrubber (17), a compressor (18) and a compressed gas circulating duct (19) into the ascending duct (13). In such an apparatus, a reduced iron discharge device (222) is installed between the pre-reducing furnace (12) and the melter-gasifier (11).</p> |
