Patent ID: 9005332
Filing Date: 2015-04-14
Classification: C02F,C10K,C21B,Y02A,Y02P,Y02W

Abstract:
1. A process for producing pig iron or liquid primary steel products, comprising: at least partially reducing charge materials comprising iron ore in at least one reduction unit using a reducing gas, smelting at least parts of the at least partially reduced charge materials in a smelting unit using solid or gaseous carbon carriers and oxygen-containing gas, wherein the smelting process forms reducing gas for use in the at least one reduction unit, cleaning the reducing gas from the smelting unit, wherein the cleaning comprises dry cleaning followed by wet cleaning, degassing process water obtained during the wet cleaning by pressure reduction and addition of purge gases to obtain bound gases from the process water, removing the bound gases, and combusting the bound gases with air or another oxygen-containing gas to decompose toxic pollutants.