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D0I:10.13374/1.issnl00103.2008.06.02 第30卷第6期 北京科技大学学报 Vol.30 No.6 2008年6月 Journal of University of Science and Technology Beijing Jun.2008 高喷煤比时高炉炉尘灰中含碳物质研究 吴铿) 陈洪飞)徐万仁2) 张海滨)周翔)费三林) 1)北京科技大学冶金与生态工程学院,北京1000832)宝山钢铁股份公司研究院炼铁新技术研究所,上海201900 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3kg:一1 的水平,表明宝钢高炉焦炭品质很高· 关键词炼铁:炉尘:高喷煤比:含碳物质 分类号TF053 Research on the carbonaceous substance of dust and sludge in BF at large pulver- ized coal injection rate WU Keng),CHEN Hongfei,XU Wanren2.ZHA NG Haibin).ZHOU Xiang),FEI Sanlin) 1)School of Metallurgical and Ecological Engineering.University of Science and Technology Beijing.Beijing 100083.China 2)Ironmaking Research Lab of Baosteel Research Institute,Shanghai Baosteel Group Corp..Shanghai 201900.China ABSTRACT 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 ob- tained 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 3kg.It is indicated that the quality of coke in Baosteel BF is very good. KEY WORDS ironmaking:BF dust:large pulverized coal injection rate:carbonaceous substance 提高喷煤量,降低焦比是高炉研究的一个长期 析不同煤比对炉尘灰中不同物质比例的影响.由炉 的热门课题.随着高炉喷煤量增加,炉尘灰(重 尘灰中未消耗焦炭和煤粉不同的比例,结合对炉尘 力灰和瓦斯泥)中碳含量也增加,深入研究高煤比 灰含碳量分析,确定出炉尘灰中未消耗焦炭量和煤 条件下,炉尘灰中含碳物质的来源,确定吨铁未消耗 粉量,进而计算出高喷煤比条件下煤粉在高炉内的 焦炭量和煤粉量,可以为在高煤比条件下保持高炉 利用率 顺行、高产、低能耗提供必要的参考依据, 本文采用矿相显微分析方法,定量地确定高炉 1矿相分析的结果 炉尘灰中含碳物质、非焦物质和含铁物质的比例,分 实验采用德国徕兹(Leica)DAS显微镜,型号 为DMRP、RXP,本研究借用煤相分析中统一标准 收稿日期:2007-04-10修回日期:2007-05-15 的数点法,将试样划分为24×24=576格,在相交点 基金项目:国家高技术研究发展计划资助项目(N。, (包括边线上的点)测定500个以上(或有效点 2006AA06Z121) 作者简介:吴铿(1951一)男,教授,博士, 300个),放大倍数为500,得到不同矿相面积的 E-mail:wukeng1030@sina.com 比例高喷煤比时高炉炉尘灰中含碳物质研究 吴 铿1) 陈洪飞1) 徐万仁2) 张海滨1) 周 翔1) 费三林1) 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 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3kg·t -1 的水平‚表明宝钢高炉焦炭品质很高. 关键词 炼铁;炉尘;高喷煤比;含碳物质 分类号 TF053 Research on the carbonaceous substance of dust and sludge in BF at large pulver￾ized coal injection rate W U Keng 1)‚CHEN Hongfei 1)‚XU W anren 2)‚ZHA NG Haibin 1)‚ZHOU Xiang 1)‚FEI Sanlin 1) 1) School of Metallurgical and Ecological Engineering‚University of Science and Technology Beijing‚Beijing100083‚China 2) Ironmaking Research Lab of Baosteel Research Institute‚Shanghai Baosteel Group Corp.‚Shanghai201900‚China ABSTRACT T he components and microstructure of BF dust (dust and sludge) in Baosteel BF at large pulverized coal injection (PCI) rate were investigated by microscopic analysis.T he area percentages of unconsumed pulverized coal and coke particles were ob￾tained at different PCI rates.T he effect of large PCI rate on the mass fraction of carbon and the unconsumed pulverized coal ratio in BF dust was analyzed.T he 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.T he 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 about3kg·t -1.It is indicated that the quality of coke in Baosteel BF is very good. KEY WORDS ironmaking;BF dust;large pulverized coal injection rate;carbonaceous substance 收稿日期:2007-04-10 修回日期:2007-05-15 基金 项 目: 国 家 高 技 术 研 究 发 展 计 划 资 助 项 目 ( No. 2006AA06Z121) 作者简介:吴 铿(1951-)‚男‚教授‚博士‚ E-mail:wukeng1030@sina.com 提高喷煤量‚降低焦比是高炉研究的一个长期 的热门课题[1-4].随着高炉喷煤量增加‚炉尘灰(重 力灰和瓦斯泥)中碳含量也增加.深入研究高煤比 条件下‚炉尘灰中含碳物质的来源‚确定吨铁未消耗 焦炭量和煤粉量‚可以为在高煤比条件下保持高炉 顺行、高产、低能耗提供必要的参考依据. 本文采用矿相显微分析方法‚定量地确定高炉 炉尘灰中含碳物质、非焦物质和含铁物质的比例‚分 析不同煤比对炉尘灰中不同物质比例的影响.由炉 尘灰中未消耗焦炭和煤粉不同的比例‚结合对炉尘 灰含碳量分析‚确定出炉尘灰中未消耗焦炭量和煤 粉量‚进而计算出高喷煤比条件下煤粉在高炉内的 利用率. 1 矿相分析的结果 实验采用德国徕兹(Leica) DAS 显微镜‚型号 为 DMRP、RXP.本研究借用煤相分析中统一标准 的数点法‚将试样划分为24×24=576格‚在相交点 (包括边线上的点) 测定 500 个以上 (或有效点 300个)‚放大倍数为 500‚得到不同矿相面积的 比例. 第30卷 第6期 2008年 6月 北 京 科 技 大 学 学 报 Journal of University of Science and Technology Beijing Vol.30No.6 Jun.2008 DOI:10.13374/j.issn1001-053x.2008.06.012
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