| 摘要 |
<p>Disclosed is a direct reduction process for a metalliferous material which comprises supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidising gas into a fluidised bed in a vessel and maintaining the fluidised bed in the vessel, at least partially reducing metalliferous material in the vessel, and discharging a product stream the comprises the at least partially reduced metalliferous material from the vessel, in which: a) the metalliferous material is reduced in a solid state in a metal-rich zone in the vessel; b) the oxygen-containing gas is injected above the supply of the metalliferous material into a carbon-rich zone in the vessel with a downward flow in a range of plus or minus 40 degrees to the vertical and heat by reactions between oxygen and the metalliferous material, the solid carbonaceous material and other oxidisable solids and gases I the fluidised bed is generated, and c) heat from the carbon-rich zone is transferred to the metal-rich zone by movement of solids within the vessel.</p> |
