| 电磁分离高硅铝硅合金制备低硅铝硅合金 |
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| 引用本文： | 张玉峰,吕国强,马文会,雷云,何云飞,谢广杰.电磁分离高硅铝硅合金制备低硅铝硅合金[J].过程工程学报,2018,18(3):582-589. |
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| 作者姓名： | 张玉峰 吕国强 马文会 雷云 何云飞 谢广杰 |
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| 作者单位： | 昆明理工大学冶金与能源工程学院，复杂有色金属资源清洁利用省部共建国家重点实验室，真空冶金国家工程实验室，
云南省高校硅冶金硅材料工程技术研究中心，云南 昆明 650093 |
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| 基金项目： | 过共晶铝硅合金电磁分离过程多场驱动下传输特性及强化机理研究 |
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| 摘 要： | 在不考虑杂质元素的情况下研究了含铝45wt%的铝硅合金熔体电磁分离过程中电流频率、下拉速度、保温温度及坩埚材质对初晶硅相分离效果的影响. 结果表明，在电流频率3 kHz、保温温度1000℃、下拉速度10 ?m/s的条件下，以石墨坩埚为容器，可使合金的硅铝质量比降至0.0939. 保温温度对合金中硅的去除影响最大，相同条件下1500℃时合金硅铝质量比为0.11439；低频交变电流能强化电磁搅拌从而加强传质，降低下拉速度对降低合金中硅含量有一定作用，且可使分离界面更平坦.
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| 关 键 词： | 一次铝硅合金 定向凝固 硅铝比 电磁搅拌 电热法 |
| 收稿时间： | 2017-09-21 |
Preparation of Low-silicon Aluminum Alloy from High-silicon Aluminum Alloy Melts by Electromagnetic Separation Process |
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| Yufeng ZHANG,Guoqiang LV,Wenhui MA,Yun LEI,Yunfei HE,Guangjie XIE.Preparation of Low-silicon Aluminum Alloy from High-silicon Aluminum Alloy Melts by Electromagnetic Separation Process[J].Chinese Journal of Process Engineering,2018,18(3):582-589. |
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| Authors: | Yufeng ZHANG Guoqiang LV Wenhui MA Yun LEI Yunfei HE Guangjie XIE |
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| Affiliation: | Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,
State Key Lab of Complex Nonferrous Metal Resources Cleaning Utilization, National Engineering Lab for Vacuum Metallurgy,
Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Provincial Universities,
Kunming, Yunnan 650093, China |
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| Abstract: | The effects of current frequency, pull-down velocity, holding temperature and crucible materials on the separation efficiency of Al?Si alloy with 45wt% Al were studied which the impurity elements were not considered. The results showed that the mass ratio of silicon to aluminum reduced 0.0939 by using graphite crucible as the container under the conditions of current frequency of 3 kHz, holding-temperature of 1000℃ and pull-down velocity of 10 ?m/s. Holding-temperature had the biggest effect on the removal of silicon in the alloy, under the same conditions, the mass ratio of Si to Al in alloy was 0.11439 at 1500℃. The low frequency alternating current strengthens the electromagnetic stirring to enhance the mass transfer. Reducing the pull-down velocity had an effect on reducing the silicon content in the alloy and can make the separation interface more flat. |
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| Keywords: | coarse aluminum-silicon alloy directional solidification silicon-aluminum ratio electromagnetic stirring electric heating method |
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