| 摘要 |
<p>PURPOSE: To provide a method for charging the raw material in a blast furnace where an excellent reduction ratio and high temperature property are realized over the whole region of an iron source raw material layer of one charge, a large amount of a fine-powdered sintered ore is used, and the fuel ratio can be reduced and the yield of the sintered ore can be improved by using reduced iron, scrap or small lump cokes. CONSTITUTION: In a method for charging the raw material in the blast furnace where cokes and iron ore raw materials are alternately charged in the blast furnace, small lump coke, reduced iron or scrap are charged in the middle layer part and/or the upper layer part of an iron source raw material. The iron source raw material layer is charged in the order of larger mean grain size to make a plurality of layers, i.e., the iron source raw material of small grain size is charged and layered in the upper layer part while the fine-powdered sintered ore, small lump cokes and fine-powdered scrap are charged in the upper layer part of the iron source raw material layer.</p> |
