PROCESS AND INSTALLATION FOR THE DIRECT PRODUCTION OF SPONGE IRON PARTICLES AND LIQUID CRUDE IRON FROM IRON ORE IN LUMP FORM

摘要

A process for the direct production of sponge iron particles and liquid crude iron from iron ore in lump form, wherein the iron ore is reduced by means of a hot reducing gas, to sponge iron particles in a direct reduction unit in the form of a loose fill and sponge iron particles which are discharged from the direct reduction unit are fed to a melting gasifier in which the heat required for melting the sponge iron, and reducing gas, are produced from coal which is introduced into the gasifier and oxygen-bearing gas which is blown thereinto, at least a part of the reducing gas, after cooling to the temperature prescribed for the reduction operation, being passed into the reduction zone of the direct reduction unit, characterised in that the sponge iron particles which are discharged from the direct reduction unit are separated into a fine grain fraction and a coarse grain fraction and only the fine grain fraction is passed to the melting gasifier.