Patent ID: 6395052
Filing Date: 2002-05-28
Classification: C21B,C21C,C22B,Y02P

Abstract:
A process for the production of direct-reduced iron, hot metal and steel, wherein input materials formed by iron ore are directly reduced to sponge iron in a first reduction zone, the sponge iron is melted to hot metal by feeding carbon-bearing materials and oxygenous gas and a reduction gas is generated which, after off-gas purification, is fed into the first reduction zone, where it is converted and drawn off as top gas, and wherein the top gas is subjected to an off-gas purification process, and wherein the hot metal is fed to a steelmaking process and wherein the off-gases of the steelmaking process are purified, wherein:the iron-bearing dusts and/or sludges separated during the purification of the off-gases of the steelmaking process are agglomerated jointly with other dusts and/or sludges accumulating during off-gas purification of the top gas from the first reduction zone and the agglomerates are further utilized as input materials for the melting and/or reduction processes of iron metallurgy and/or for cement production; and an iron-bearing material is formed which provides the steelmaking process with the total amount of iron necessary for the steelmaking process and which consists of the hot metal produced as well as any dusts and/or sludges accumulating during the process and the agglomerates produced thereof.