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高炉采用3级除尘后,其第2级的旋风灰中含有大量的含铁氧化物和碳,将其作为喷吹煤粉的添加剂从高炉风口喷入,可促进煤粉燃烧,达到高效利用旋风灰的目的。对首秦高炉除尘灰进行粒度和化学成分分析,发现旋风灰可以作为添加剂与煤粉进行混合喷吹。通过实验室测定不同含量旋风灰对煤粉燃烧性的影响,确定在富氧率为3%,添加旋风灰比例为6%时,可达到最佳的煤粉燃烧效果。首秦高炉的试验结果表明,喷煤时添加3%以下的旋风灰代替相应的煤粉,生产平稳,喷吹系统运转正常。高炉自产的旋风灰作为煤粉添加剂是可行的,可以带来较好的经济效益和社会效益。
Blast furnace with three dust, the second level of the cyclone contains a lot of iron oxide and carbon, as a pulverized coal injection additives from blast furnace tuyere can promote the combustion of coal to achieve the efficient use of cyclones Ash purpose. On the first blast furnace ash dust particle size and chemical composition analysis, found that cyclone ash can be used as additives and pulverized coal injection mixed. Through the laboratory determination of different content of cyclone ash on the combustion of coal, to determine the oxygen enrichment rate of 3%, the addition of cyclone 6% ratio, you can achieve the best pulverized coal combustion. The test results of blast furnace in Shouqin show that when the coal is added, the cyclone below 3% is replaced by the corresponding pulverized coal, the production is stable and the injection system is operating normally. As a pulverized coal additive, cyclone produced by the blast furnace is feasible, which can bring better economic and social benefits.