Process for producing pig iron or liquid primary steel products

摘要

A process for producing pig iron or liquid primary steel products is provided. Charge materials containing iron ore and, if appropriate, additions are reduced in at least one reduction unit by means of a reducing gas, and at least parts thereof are smelted in a smelting unit, with coal being added and with formation of the reducing gas. Reducing gas from the smelting unit and/or top gas from the reduction unit are/is subjected to cleaning. The process water obtained during the wet cleaning is degassed and in the process volatile organic compounds are removed from the process water.

主权项

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.