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Method of iron smelting in blast furnace with high temperature coal Gas
Method of iron smelting in blast furnace with high temperature coal Gas
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机译:高炉煤气高炉炼铁的方法
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摘要
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 125-210 kg 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° C. with an horizontal high temperature blast heater, blowing the preheated coal gas having a thermal value of 11.7-12.5 mj/m3 into the blast furnace from top of the furnace at an amount of 1000 m3 per ton of molten iron and a pressure of 0.1-0.6 MPa; blowing air preheated to higher than 1250-1450° C. at an amount of 300-400 n m3 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.
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机译:一种在高炉中用高温煤气进行铁冶炼的方法,包括以下步骤:(1)将由球团矿,碱性烧结矿,焦炭和石灰石组成的原料从炉顶装入高炉,其中焦炭为125-210公斤/吨铁水,含铁原料由90%的球团矿和10%的碱性烧结矿组成,品位62%以上。 (2)用卧式高温鼓风加热器将煤气预热至1250-1450℃,将热值为11.7-12.5mj / m3的预热煤气从炉顶吹入鼓风炉。每吨铁水1000立方米,压力0.1-0.6兆帕;以每吨铁水300-400 n m3的量吹入预热到1250-1450°C的空气。该方法中使用的煤气充当还原剂和燃料,因此将减少焦炭消耗。
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