Patent ID: 8968441
Filing Date: 2015-03-03
Classification: C21B,F27D,Y02P

Abstract:
1. A method for the production of pig iron or liquid steel semi-finished products, comprising the steps of: at least partially reducing metal-containing batch materials in a reduction zone by a reduction gas, subsequently introducing the reduced metal-containing batch materials into a smelting zone and smelting the reduced metal-containing batch materials along with a supply of lumpy carbon carriers and oxygen-containing gas, while the reduction gas is formed, wherein the reduction gas formed in the smelting zone is supplied to the reduction zone and reacted there and drawn off as export gas, delivering at least part of the export gas into a CO utilizing the formed product gas for the introduction, or injection, of pulverulent carbon carriers together with a conveying gas, into the melting zone by: introducing the pulverulent carbon carriers into a mixing chamber via a conveying gas that is different than the product gas, and introducing the product gas into the mixing chamber such that the product gas acts as a propellant gas to accelerate the pulverulent carbon carriers into the smelting zone, wherein the pulverulent carbon carriers are introduced into the smelting zone separately from the reduced metal-containing batch materials, and controlling the introduction of pulverulent carbon carriers into the smelting chamber by controlling the quantity of the conveying gas supplied to the mixing chamber; wherein the introduction of the product gas and of the pulverulent carbon carriers, together with the conveying gas, into the smelting zone takes place together with an oxygen-containing gas.