Patent ID: 6203594
Filing Date: 2001-03-20
Classification: C21B

Abstract:
A method of reducing iron ore in a blast furnace into pig iron with the use of carbon and carrying out a hot air production, the method comprising admixing a first partial quantity of the carbon to the iron ore in the blast furnace in the form of coke for ensuring that a charge material column in the blast furnace is loosened and supported and gas can penetrate through the charge material column, gasifying a remaining second partial carbon quantity constituting a substitute reducing agent outside of the blast furnace in a gasification reactor arranged spatially separate from the blast furnace for producing a gasification product and reduction gas and conducting the gasification product into the blast furnace, anda) removing thermal energy required for the gasification in the gasification reactor from the blast furnace as blast furnace gas subjected to combustion in the gas reactor or as heat removed from the hot air production;b) carrying out the gasification for producing a low-nitrogen reduction gas by adding oxygen;c) conducting the reduction gas produced by the gasification in the gasification reactor without admixing additional gases at a high temperature directly to the furnace.