基于氧气高炉的烧结矿还原动力学分析

Chongqing Daxue Xuebao/Journal of Chongqing University(2012)

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Abstract
采用热天平减重法在氧气高炉气氛下进行烧结矿的还原实验,考察还原度RI和还原速率RI′的变化情况,并进行烧结矿还原动力学分析。结果表明:在氧气高炉气氛900℃下还原时,烧结矿的还原度RI高达98.2%;还原终了时间随还原温度的提高而缩短,由900℃时的117min缩短到1 100℃时的63min;氧气高炉气氛下,烧结矿还原的开始阶段由界面化学反应控速,还原约20min后转变为由界面化学反应和内扩散混合控速;氧气高炉气氛900~1100℃时,烧结矿还原反应开始阶段的表观活化能为38.30kJ/mol。
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Key words
Activation energy,Blast furnace,Reaction kinetics,Reduction,Sinter
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