SiO_2还原对高炉风口前理论燃烧温度的影响  

Effect of SiO_2 reduction on the theoretical flame temperature before the tuyere in a blast furnace

作　　者：张二华[1] 吴铿[1] 万鹏[1] 韦少华[1] 李康[1] 杨森[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《北京科技大学学报》2010年第11期1406-1411,共6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.2009AA06Z105);国家自然科学基金"钢铁联合研究基金"资助项目(No.50874129;No.50934007)

摘　　要：风口前理论燃烧温度是衡量炉缸热状态的重要参数之一,而SiO2在风口前被碳还原对其产生的影响一直被忽略.通过实验研究了高炉风口前不同位置的试样,得到进入风口回旋区焦炭的温度和不同位置试样渣中SiO2的含量,从而确定出在风口回旋区SiO2的还原率,并建立了考虑SiO2还原情况下理论燃烧温度的计算公式,最后在富氧喷煤的条件下,分析和讨论了煤粉中灰分变化对理论燃烧温度的影响因素.The theoretical flame temperature before the tuyere in a blast furnace（BF）is one of the important parameters to measure the thermal state of the hearth.However,it is ignored that SiO2 reduction before the tuyere can impact the theoretical flame temperature.The coke temperature entered the raceway and the SiO2 content at different locations before the tuyere in the BF were obtained by studying tuyere-level samples from the BF.And then the reduction rate of SiO2 before the tuyere was determined and the theoretical flame temperature formula with regard to the effect of SiO2 reduction was established.Finally,under the condition of pulverized coal injection（PCI）and oxygen enrichment,the effect of changing the ash content in coal on the theoretical flame temperature was analyzed and discussed.

关 键 词：高炉 燃烧温度 二氧化硅 还原 煤粉喷吹 

分 类 号：TF511[冶金工程—钢铁冶金]