A model of post-combustion in iron-bath reactors,part 4: results for post-combustion with preheated air

This paper describes calculated results of post-combustion with pre-heated air, heat transfer from gas to the melt via a mixture of metal and slag droplets, reoxidation at the metal droplets, CO evolution rate from the melt, production rate of the reactor, and carbon consumption of various process modes of a 15-t reactor with or without oxygen blowing through the vessel bottom. Using pre-heated air, the achievable post-combustion degree is higher than using pure oxygen. Nevertheless, slag droplets as heat carrier are necessary. With 50 % slag droplets the real post-combustion degree can be higher than 45 %. With 90 % slag droplets it can be even higher than 80 %. The operating point of the reactor is discussed.