A DIRECT SMELTING PROCESS

摘要

A process for direct smelting a metalliferous feed material is disclosed. Th e process includes the steps of partially reducing metalliferous feed material and subsantially devolatilising coal in a pre-reduction vessel and producing a partially reduced matelliferous feed material and char. The process also includes direct smelting the partially reduced matalliferous feed material t o molten metal in a direct smelting vessel using the char as a source of energ y and as a reductant and post-combusting reaction gas produced in the direct smetling process with pre-heated air or oxygen-enriched air to a post- combustion level of greater than 70 % to generate heat required for the dire ct smelting reactions and to maintain the metal in a molten state.