| 鲕状赤铁矿生物质低温磁化焙烧 |
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| 引用本文： | 黄冬波,宗燕兵,邓振强,刘莲凤,李彦辉,王俊,刘晓明.鲕状赤铁矿生物质低温磁化焙烧[J].北京科技大学学报,2015(10):1260-1267. |
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| 作者姓名： | 黄冬波 宗燕兵 邓振强 刘莲凤 李彦辉 王俊 刘晓明 |
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| 作者单位： | 1. 北京科技大学冶金与生态工程学院,北京,100083;2. 北京科技大学冶金与生态工程学院，北京100083; 北京科技大学钢铁冶金新技术国家重点实验室，北京100083 |
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| 基金项目： | 国家自然科学基金资助项目，中央高校基本科研业务费专项资金资助项目 |
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| 摘 要： | 对生物质磁化鲕状赤铁矿石进行研究,包括磁化温度、磁化时间、生物质用量以及赤铁矿石粒度对磁化效果的影响.在磁化温度为600℃,赤铁矿石与生物质的质量比为10：2的情况下,利用生物质热解产生的气体和焦油在30 min内可以完全磁化粒度为0.074 mm (>72.5%)的赤铁矿石,验证了生物质替代煤基还原剂进行磁化焙烧具有一定的可行性.此外,矿石粒度对磁化焙烧还原度的影响比较大,矿石粒度越大,完全磁化所需时间越长.根据生物质还原剂的特点,适当地减小矿石粒度可以有效改善赤铁矿石的磁化性能.
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| 关 键 词： | 赤铁矿 磁化 焙烧 生物质 还原剂 粒度 |
Magnetizing roast of oolitic hematite by biomass at low temperature |
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| Abstract: | This paper reports the magnetizing roast of oolitic hematite ore, including the dependency of the magnetization effect upon magnetization temperature, magnetization time, biomass content and ore particle size. It is indicated that the oolitic hematite ore with a particle size of 0. 074 mm ( >72. 5%) is completely magnetized in 30 min by biomass-generated gases and tar at 600℃ when the ore-to-biomass mass ratio is 10:2, which verifies the feasibility of this substitution of biomass for coal as a reductant for magneti-zing roast. In addition, the particle size of the oolitic hematite ore has great effect on the reduction index of magnetizing roast. The lar-ger the particle size, the longer the complete magnetization time is. According to the character of biomass, the magnetic properties of the oolitic hematite ore can be effectively improved by appropriately decreasing the particle size. |
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| Keywords: | hematite magnetization roasting biomass reductants particle size |
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