| 摘要 |
<p>The invention relates to a method for producing iron, especially steel, from ferriferous oxides. According to said method, an H2 smelting reduction is carried out in a smelting vessel (1) and H2-containing gas and energy are supplied. The ferriferous oxides are preheated and prereduced in at least one preheating and prereduction area (11a) using a gas containing H2 and H2O, which is drawn out of the smelting vessel (1) and then conveyed to the preheating and prereduction area (11a), optionally after a gas containing more than 50 %, preferably more than 90 % H2 has been added. The preheated and prereduced ferriferous oxides are then introduced into the smelting vessel (1), where they are melted down and the reduction is completed using a gas containing more than 50 %, preferably more than 90 % H2. This maximises the degree of utilization of the thermal and chemical potential of the H2-containing gas used for the smelting reduction process and minimises the quantity of energy supplied from outside.</p> |
