PROCESS AND APPARATUS FOR PRE-HEATING AND PRE-REDUCING METAL OXIDE CONTAINING MATERIALS, ESPECIALLY IN PROCESS OF TREATING MINERALS OR CONCENTRATES THEREOF

摘要

A method and apparatus for producing, in a reactor, a suitable prereduced product for final reduction from material containing metal oxide. The material is preheated in a fluidized bed by means of hot gases from a subsequent prereduction stage. The hot material is smelted and prereduced in a flame chamber utilizing hot reducing gases from a subsequent final reduction stage. The prereduced material is completely reduced in the final reduction stage.