Patent ID: 9546409
Date: 2017-01-17
CPC Classifications: C10K,C21B,C22B,Y02P

Claim:
1. A direct reduction process for producing direct reduced iron (DRI) from particulate iron ores in the form of lumps, pellets or mixtures thereof, utilizing reducing gases produced from solid or liquid fossil fuels, in a reduction reactor having a reduction zone where the particles of iron ore are caused to react with a reducing gas fed to said reduction zone at a temperature in the range from 750° C. to 1100° C., characterized by: heating a first gas stream derived from coal by means of regenerative heaters, where heat is transferred from a previously heated solid material to said gas produced from solid or liquid fossil fuels, at a temperature between 650° C. and 800° C.; causing the resulting hot first gas stream derived from coal to flow into contact with a bed of particles of a material adsorbent of sulfur compounds, outside of said reduction reactor, to form a second gas stream; combining said second gas stream with a third gas stream withdrawn from said reduction reactor from which H