Direct reduction of iron ore by biomass char

Direct reduction of iron ore by biomass char
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生物质焦直接还原铁矿石

DOI:
10.1007/s12613-013-0759-7
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发表时间:
2013-06
影响因子:
4.8
通讯作者:
Zuo, Hai-bin, Hu, Zheng-Wen, Zhang, Jian-Liang
Zuo, Hai-bin, Hu, Zheng-Wen, Zhang, Jian-Liang
中科院分区:
材料科学2区
文献类型:
--
作者:
Zuo, Hai-bin, Hu, Zheng-Wen, Zhang, Jian-Liang

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采用热重分析法研究了生物质半焦还原铁矿石的过程和机理,并与煤和焦炭还原铁矿石进行了比较。结果表明,生物质半焦具有较高的反应活性。碳氧摩尔比(C/O)的增加可导致反应速率和还原分数的提高,但不能改变各反应的温度和趋势。生物质半焦还原赤铁矿的反应温度比煤和焦炭还原赤铁矿的反应温度至少低100 K,最大反应速率是煤的1.57倍,最终反应分数也高得多。模型计算表明,高炉使用生物质焦和铁矿石组成的炉料可能会降低热储备区的温度,降低CO平衡浓度。
By using thermogravimetric analysis the process and mechanism of iron ore reduced by biomass char were investigated and compared with those reduced by coal and coke. It is found that biomass char has a higher reactivity. The increase of carbon-to-oxygen mole ratio (C/O) can lead to the enhancement of reaction rate and reduction fraction, but cannot change the temperature and trend of each reaction. The reaction temperature of hematite reduced by biomass char is at least 100 K lower than that reduced by coal and coke, the maximum reaction rate is 1.57 times as high as that of coal, and the final reaction fraction is much higher. Model calculation indicates that the use of burden composed of biomass char and iron ore for blast furnaces can probably decrease the temperature of the thermal reserve zone and reduce the CO equilibrium concentration.
DOI: 10.1016/s1006-706x(10)60064-7
发表时间: 2010-03
影响因子: 2.5
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