| 摘要 |
<p>PURPOSE:To allow tapping which is not too high or too low from the target output of a molten iron by tilting a cylindrical furnace which is charged with raw materials from the throat in the upper part and taps the molten iron from the tap hole in the bottom, and thereby storing a prescribed volume of the molten iron in the pouring basin formed in the bottom. CONSTITUTION:Gases are discharged from the throat 2 in the upper part of the cylindrical furnace 1 and the raw materials are charged into the furnace to form a coke packed bed 7 in the lower part and a packed bed 8 of iron ore and scrap in the upper part. The molten iron is produced by blowing a combustion supporting gas and fuel from primary tuyeres 3 in the lower part and a combustion supporting gas is blown from secondary tuyeres 4 in the upper part. The molten iron is tapped from the tap hole 5 in the bottom and slag is discharged from a slag discharge port 10. The cylindrical furnace 1 of the above-mentioned apparatus for producing the molten iron is tilted by a tilting device 6 and the stagnating volume of the molten iron in the pouring basin part 11 below the horizontal line connecting the bottom end edge of the tap hole 5 and the bottom end edge of the slag discharge port 10 is maintained at >=2 times the fluctuation range quantity of the molten iron output per charge. The charge quantity in terms of the pig iron of the raw materials is set at the quantity obtd. by adding the fluctuation range quantity of the molten iron output to the target output per charge and the tapping rate is adjusted by the above-mentioned stagnating molten iron.</p> |
