| 摘要 |
<p>An iron ore refining method in which a secondary reactor (24) is employed for partly reducing iron ore and partly oxidising a carbon containing substance to form partly reduced secondary iron ore, coal char and a calorific gas containing carbon dioxide and carbon monoxide in a ratio of not less than about 0.25. The calorific gas is separated from the partly reduced secondary iron ore and the coal char and the resulting heated solids are introduced into the primary reactor (10) without substantial cooling. All or part of the iron product is formed from the partly reduced iron ore produced in the primary reactor (10). Since the secondary reactor (24) operates at a lower temperature than the primary reactor, part of the iron product is processed at a lower temperature to reduce oxygen requirements for the refining and to increase thermal efficiency. <IMAGE></p> |
