Application of Biomass to the Direct Reduction Process
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摘要: 选取木炭和无烟煤作为还原剂，分别研究了还原温度、C/O、还原时间对球团金属化率的影响。此外，还采用XRD物相检测分析、对比无烟煤和木炭对球团的还原效果。研究结果表明：以生物质木炭作为还原剂具有与无烟煤相当的还原效果，当C/O相同时，配加生物质木炭的球团与配加无烟煤含碳球团相比获得球团金属化率差距并不明显，以木炭为还原剂实现含碳球团的直接还原是可行的；以木炭为还原剂时，1 200℃下，C/O=0.7，还原时间20 min时，球团金属化率可达80%以上。Abstract: In this paper,charcoal and anthracite were selected as reducing agent to study the influence of reduction temperatures,C/O,reduction time on metallization rate.In addition,the effect of reduction by charcoal and anthracite had been compared by using XRD analysis.The results show that the charcoal has similar reduction effect with anthracite when used for direct reduction process.Under same conditions（temperatures,C/O and time）,the effect of charcoal and anthracite on metallization rate have less difference.It is feasible that using charcoal as reducing agent in the direct reduction process.When temperature is 1 200 ℃,C/O is 0.7,and better reduction time is 20 min,using charcoal as reducing agent can achieve more than 80% metallization rate.
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Key words:
- carbon-bearing pellet /
- direct reduction /
- biomass /
- metallization
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