Patent ID: 8632622
Filing Date: 2014-01-21
Classification: C21B,Y02P

Abstract:
1. A process for producing pig iron or liquid primary steel products in a melter gasifier and a smelting reduction unit, comprising: at least partially reducing iron-ore-containing charge materials in at least one reduction unit by means of a reducing gas, melting a first fraction of the at least partially reduced charge materials in the melter gasifier and also supplying carbon carriers, and oxygen-containing gas to the melter gasifier for simultaneous formation of the reducing gas, feeding the reducing gas to the at least one reduction unit and, after the reducing gas has passed through the reduction unit, drawing off the reducing gas which has passed through the reduction unit, as top gas or as export gas, and feeding a second fraction of the at least partially reduced charge materials, Fe carriers other than the second fraction of the at least partially reduced charge materials, and carbon containing reducing materials to the smelting reduction unit for reducing the second fraction of the at least partially reduced charge materials and smelting it, wherein the amount of the second fraction of the at least partially reduced charge materials is 10-60%, with reference to an iron fraction of all Fe carriers that are charged into the smelting reduction unit.