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本文结合鞍钢2号高炉高富氧大量喷吹煤粉工业性冶炼试验,根据实验室与高炉风口取样等研究结果,分析了富氧鼓风条件下,风口区域煤粉的燃烧状况与其对高炉冶炼过程的影响。结果表明:(1)富氧鼓风后,煤粉在风口前燃烧明显改善,其燃烧率由普通鼓风60～70％提高到80％以上,炉内煤粉利用率达到95％;(2)风口回旋区缩小,边沿煤气流明显发展;(3)风口区氧势增强,氧化带向炉中心延伸,生铁含硅降低,铁水温度有所升高。
Based on the research results of the laboratory and blast furnace tuyere sampling, the combustion status of pulverized coal in the tuyere area and its influence on blast furnace smelting process Impact. The results show that: (1) After the oxygen-enriched blasting, the combustion of pulverized coal in the tuyere significantly improved, the combustion rate increased from 60-70% of common blast to more than 80%, and the utilization rate of pulverized coal in the furnace reached 95%; (2) ) Tuyere convolution area is reduced, the edge of the gas flow significantly developed; (3) tuyere area oxygen potential increased oxidation zone extends to the center of the furnace, the pig iron reduces silicon, the molten iron temperature has increased.