| 微波场中氧化球团升温性能及结构变化 |
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| 引用本文： | 胡兵,黄柱成,姜涛,彭虎.微波场中氧化球团升温性能及结构变化[J].中南大学学报(自然科学版),2011,42(11). |
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| 作者姓名： | 胡兵 黄柱成 姜涛 彭虎 |
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| 作者单位： | 1. 中南大学资源加工与生物工程学院,湖南长沙,410083
2. 长沙隆泰微波热工有限公司,湖南长沙,410013 |
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| 基金项目： | 教育部新世纪优秀人才支持计划项目 |
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| 摘 要： | 在氮气保护下对氧化球团进行微波加热,旨在研究微波场中氧化球团的升温性能以及结构变化.氧化球团在中性气氛的微波场中进行加热,升温过程可以划分为缓慢升温、快速升温和较慢升温3个阶段.不同终点温度下氧化球团在冷态时的电磁性能测试以及微观结构观察结果显示:氧化球团在升温过程中内部结构发生了较大的改变,冷态时磨细再成型测其电磁性能变化不大,升温速度的不一致与温度和球团结构变化有关.整个过程中球团的强度和真孔隙率都是先降低再升高的,通过扫描电镜观察发现:颗粒在电磁场中首先出现碎裂现象,随着温度的升高,颗粒发生重结晶,造成球团结构的改变.
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| 关 键 词： | 直接还原 微波场 氧化球团 体积加热 真孔隙率 |
Structure change and temperature rising behavior of oxidized pellet in heating process on microwave field |
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| HU Bing,HUANG Zhu-cheng,JIANG Tao,PENG Hu.Structure change and temperature rising behavior of oxidized pellet in heating process on microwave field[J].Journal of Central South University:Science and Technology,2011,42(11). |
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| Authors: | HU Bing HUANG Zhu-cheng JIANG Tao PENG Hu |
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| Institution: | HU Bing1,HUANG Zhu-cheng1,JIANG Tao1,PENG Hu2 (1.School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China,2.Changsha Syno-Therm Co.Ltd.,Changsha 410013,China) |
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| Abstract: | The structure change and temperature rising behavior of oxidized pellet by microwave heating under the condition of nitrogen protection were studied.The result shows that oxidized pellet's microwave heating process can be divided into three stages: slow heating,fast heating and slower heating.The change of the electromagnetic properties of pellets which makes the pellet have different rate of temperature rising in microwave field is caused by temperature and structure change.The cold pellets at different en... |
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| Keywords: | direct reduction microwave field oxidized pellet volumetric heating true porosity |
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