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承钢2500m~3高炉在喷吹煤粉中添加5%的干熄焦除尘灰,烟煤比例为45%。对混合煤粉的灰分、挥发分、固定碳进行了实验室分析,并重点对混合煤粉的燃烧率进行了试验测定,结果表明,当烟煤配比提高到45%、干熄焦除尘灰添加比例控制在5%~8%时,混合煤粉的燃烧率与不添加干熄焦除尘灰时的燃烧率基本持平。生产实践表明,2500m~3高炉在煤比为130~150kg/t的操作水平下,配加适当比例的干熄焦除尘灰是可行的,燃料比较为稳定,并没有升高的趋势。
Cheng-steel 2500m ~ 3 blast furnace in the injection of pulverized coal added 5% of the CDQ dust, bituminous coal ratio of 45%. The ash content, volatile matter and fixed carbon of pulverized coal were analyzed by laboratory, and the combustion rate of pulverized coal was emphatically tested. The results showed that when the proportion of bituminous coal increased to 45%, the addition of CDQ dust When the proportional control is between 5% and 8%, the combustion rate of mixed pulverized coal is basically the same as the combustion rate when no dust is added. Production practice shows that 2500m ~ 3 blast furnace in the coal ratio of 130 ~ 150kg / t level of operation, with an appropriate proportion of CDQ dust is feasible, the fuel is relatively stable, there is no upward trend.