Direct reduction of iron ore by biomass char

作者：Zuo, Hai-bin^*; Hu, Zheng-wen; Zhang, Jian-liang; Li, Jing; Liu, Zheng-jian

来源：International Journal of Minerals,Metallurgy and Materials, 2013, 20(6): 514-521.

DOI：10.1007/s12613-013-0759-7

• ironmaking
• biomass char
• hematite
• direct reduction process
• thermogravimetric analysis

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.

• 出版日期2013-6
• 单位北京科技大学