Patent ID: 8357224

Claim:
A method of iron smelting in a blast furnace with high temperature coal gas comprising the following steps: 1) charging raw materials consisting of pellets, basic sintered ore, coke, and limestone into a top of a blast furnace, in which the amount of coke is 125-210kg per ton of molten iron; and 2) producing molten iron by preheating coal gas to 1250-1450° C. with a horizontal high temperature blast heater and blowing the preheated coal gas having a thermal value of 11.7-12.5 MJ/m 3 into the blast furnace from the top of the furnace at an amount of 1000 m 3 per ton of molten iron and a pressure of 0.1-0.6 MPa; and at the same time supplying air preheated to higher than 1250-1450° C. to the blast furnace at an amount of 300-400 normal cubic meters per ton of molten iron.