Method for pre-heating sponge iron comprises passing a hot circulating gas through an sponge iron material, transferring the heat energy of the gas to the material and heating in a heat exchanger to a pre-heating temperature

摘要

Method for pre-heating sponge iron comprises passing a hot circulating gas through an sponge iron material, transferring the heat energy of the gas to the material and heating in a heat exchanger to a pre-heating temperature. The average value of the heating gas flow adjusted over the total heating time lies below 6000 Nm3/h based on a 1 m3 surface area of the iron sponge material. - An INDEPENDENT CLAIM is also included for a device for heating direct reduction pellets.