Patent ID: 6458181
Filing Date: 2002-10-01
Classification: C21B,Y02P

Abstract:
A process for production of pig iron comprising the steps of:(a) chemically-exothermally gasifying a first fuel comprising a fossil fuel with (i) air; and/or (ii) oxygen with the addition of blast furnace gas from a blast furnace process; and/or (iii) water vapor under a pressure higher than a pressure in a blast furnace at a height of a tuyere and at a temperature between 1000 and 1800Â° C.; to produce a first reduction gas and coke dust; (b) blowing a second fuel comprising a fossil fuel into said reduction gas wherein said fuel partially reacts with said first reduction gas to produce a second reduction gas and coke dust and wherein a mole ratio of reducing components, carbon monoxide and hydrogen, to oxidizing components, carbon dioxide and water vapor, is at least 3:1; (c) blowing said second reduction gas into a blast furnace at a height of a tuyere at a temperature of 300 to 1000Â° C.