针对生物质碳基还原动力学条件差、还原效率低的问题,将生物质裂解产物焦油作为还原剂,与铁矿粉混合还原炼铁.通过还原试验,对铁矿粉预热温度、还原温度、焦油与铁矿粉当量比等影响因素进行探讨.结果表明:铁产品质量随预热温度升高先上升后下降,在预热温度为450℃时达到最高;增加反应温度和铁矿粉与焦油当量比,能提高铁产品的还原度.当采用最佳工况(450℃预热30 min,焦油与铁矿粉质量比1.2∶1,1 000℃下还原45 min),可得到还原度为72.6％的还原铁产品.
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