| 低品位复杂红土镍矿微波干燥及矿相分析 |
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| 引用本文： | 张钰婷,张昭,袁熙志,游贤贵,刘中清.低品位复杂红土镍矿微波干燥及矿相分析[J].北京科技大学学报,2010,32(9). |
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| 作者姓名： | 张钰婷 张昭 袁熙志 游贤贵 刘中清 |
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| 作者单位： | 四川大学化学工程学院,成都,610065 |
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| 基金项目： | 国家高技术研究发展计划资助项目 |
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| 摘 要： | 研究了在碳化硅辅助吸波作用下,低品位红土镍矿在微波场中的干燥过程.采用热重分析(DTG)、X射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)分析考察了添加不同质量分数碳化硅对失重率和产物物相的影响.结果表明:碳化硅与红土矿配比R为2.2:1时,微波干燥处理低镍、铁品位红土矿30min,既可快速脱除矿物绝大部分表面吸附水和部分结晶水;通过控制碳化硅的比例还可以避免过热现象.微波能够改变红土矿的微观结构,促进矿物的分解.进一步的氢还原实验表明,微波干燥有利于红土矿中镍和铁氧化物的还原,其还原率高于常规干燥.
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| 关 键 词： | 红土镍矿 相组成 微波 干燥 碳化硅 |
Microwave-drying process and mineral phase analysis of low-grade complex laterite ores |
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| ZHANG Yu-ting,ZHANG Zhao,YUAN Xi-zhi,YOU Xian-gui,LIU Zhong-qing.Microwave-drying process and mineral phase analysis of low-grade complex laterite ores[J].Journal of University of Science and Technology Beijing,2010,32(9). |
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| Authors: | ZHANG Yu-ting ZHANG Zhao YUAN Xi-zhi YOU Xian-gui LIU Zhong-qing |
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| Institution: | ZHANG Yu-ting,ZHANG Zhao,YUAN Xi-zhi,YOU Xian-gui,LIU Zhong-qing College of Chemical Engineering,Sichuan University,Chengdu 610065,China |
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| Abstract: | Silicon carbide as a assistant wave-absorbing material was used to study the microwave-drying process of a low-grade laterite ore.The effects of SiC mass fraction on the weight-loss rate and phase composition of the laterite ore were analyzed by thermogravimetric analysis (DTG),X-ray diffraction analysis (XRD) and Fourier transform infrared spectroscopy (FT-IR).It is shown that when the SiC-to-ore mass ratio is 2.2:1,most of surface-absorbed water and part of crystal water in the laterite ore can be rapidly... |
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| Keywords: | laterite phase composition microwaves drying silicon carbide |
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