Method of manufacturing hot metal

摘要

A method of manufacturing hot metal from iron oxide in a shaft furnace by means of reduction with CO and H2 is described in the case of which iron oxide and coke are placed in the shaft furnace. For the purpose of the coke combustion, oxygen or a gas containing oxygen is introduced together with a reduction gas having a temperature ranging from approximately 1300 DEG to 1500 DEG C., comprising for the most part CO and H2 and introduced from the hot metal zone of fusion into the furnace shaft. The flue gas of the shaft furnace is purified at least partly, whereby a backflow gas comprising for the most part CO and H2 is formed and introduced back into the shaft furnace. This method is characterized by the fact that it is especially economical.