Process for the production of molten pig iron or steel pre-products as well as arrangement for carrying out the process.

摘要

In a process for the production of molten pig iron from lumpy raw materials containing iron ore, these are reduced in a reduction shaft furnace (1) by means of a reducing gas, the iron sponge particles obtained being fused in a fusion gasifier (3) with addition of coal and oxygen-containing gas with simultaneous formation of the reduction gas, and the reduction gas being fed to the reduction zone of the shaft furnace (1). In order to be able to use major quantities of fine ore and/or ore dust, such as fine iron oxide dust arising in a smelting works, in addition to the raw materials, the fine ore and/or the ore dust is fed together with solid carbon carriers to at least one dust burner (17) firing into the fusion gasifier (3) and converted in a less than stoichiometric combustion reaction (Figure 1).