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测定了高喷煤比的高炉炉尘(重力灰和瓦斯灰)中矿物组成,给出了在不同煤比条件下未消耗焦炭和煤粉面积比.分析了高喷煤比对高炉炉尘中碳质量分数和未消耗煤粉比例的影响.确定了宝钢高炉在高喷煤比时高炉炉尘中未消耗煤粉量、焦炭颗粒量和煤粉在高炉内的利用率.通过试验发现,随着喷煤比增加,炉尘量增加,但在高喷煤比后,炉尘量波动较大.高炉炉尘中未消耗碳量和煤粉量随着喷煤比的增加逐渐增加,而未消耗焦炭量不受喷煤比变化的影响,基本上保持在3 kg.t-1的水平,表明宝钢高炉焦炭品质很高.
The mineral composition of blast furnace dust (gravity ash and gas ash) with high PCI ratio was measured and the area ratio of unburned coke and coal powder under different coal ratio conditions was given. The effect of high PCI ratio on blast furnace dust The carbon mass fraction and the proportion of unspent pulverized coal.The blast furnace of Baosteel determined the amount of unused coal, the amount of coke particles and the utilization rate of pulverized coal in the blast furnace dust of high blast furnace coal blast furnace.Through the test, With the increase of PCI rate, the amount of furnace dust increased, but after high PCI ratio, the amount of furnace dust fluctuated greatly, and the amount of unconsumed carbon and the amount of pulverized coal in blast furnace dust increased gradually with the increase of PCI rate, Consumption of coke is not affected by changes in coal injection, basically maintained at the level of 3 kg.t-1, indicating high quality coke Baosteel blast furnace.