高喷煤比时高炉炉尘灰中含碳物质研究  

Research on the carbonaceous substance of dust and sludge in BF at large pulverized coal injection rate

作　　者：吴铿[1] 陈洪飞[1] 徐万仁[2] 张海滨[1] 周翔[1] 费三林[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]宝山钢铁股份公司研究院炼铁新技术研究所,上海201900

出　　处：《北京科技大学学报》2008年第6期664-668,共5页Journal of University of Science and Technology Beijing

基　　金：国家高技术研究发展计划资助项目(No.2006AA06Z121)

摘　　要：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 components and microstructure of BF dust （dust and sludge） in Baosteel BF at large pulverized coal injection （PCI） rate were investigated by microscopic analysis. The area percentages of unconsumed pulverized coal and coke particles were obtained at different PCI rates. The effect of large PCI rate on the mass fraction of carbon and the unconsumed pulverized coal ratio in BF dust was analyzed. The amounts of unconsumed pulverized coal and coke particles as well as the utilization rate of pulverized coal were tested in BF at large PCI rate. The experimental results showed that with increasing PCI rate the amount of BF dust increased, but at large PCI rate it fluctuated. With the increase in coal injection rate the amounts of carbon and unconsumed pulverized coal in BF dust increased, but the amount of unconsumed coke particles in BF dust hardly changed and kept at about 3 kg· t^-1. It is indicated that the quality of coke in Baosteel BF is very good.

关 键 词：炼铁 炉尘 高喷煤比 含碳物质 

分 类 号：TF053[冶金工程—冶金物理化学]