| 摘要 |
<p>A method of iron smelting in blast furnace with high temperature coal gas comprises the following steps: (1) charging raw materials consisting of pellets, basic sintered ore, coke and limestone into a blast furnace from top of the furnace, in which the amount of the coke is 125-210kg per ton of molten iron, raw materials containing iron is composed of 90% pellets and 10% basic sintered ore, and ore grade is above 62%; (2) preheating coal gas to 1250-1450? with an horizontal high temperature blast heater, blowing the preheated coal gas having a thermal value of 11.7-12.5mj/m3 into the blast furnace from top of the furnace at an amount of 1000m3 per ton of molten iron and a pressure of 0.1-0.6MPa; blowing air preheated to higher than 1250-1450? at an amount of 300-400nm3 per ton of molten iron. The coal gas used in the method acts as a reducer and fuel, as a result the coke consumption would be reduced.</p> |
