| Zn还原法制多晶硅副产物ZnCl_2的电解回收 |
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| 引用本文： | 张愿成,张滢清,韩晓龙,李红波. Zn还原法制多晶硅副产物ZnCl_2的电解回收[J]. 青岛科技大学学报(自然科学版), 2013, 0(1): 38-41 |
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| 作者姓名： | 张愿成 张滢清 韩晓龙 李红波 |
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| 作者单位： | 上海太阳能工程技术研究中心有限公司 |
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| 基金项目： | 上海市科技人才计划项目(10QB1403000) |
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| 摘 要： | Zn还原法制多晶硅会产生大量的ZnCl2副产物,在不添加其他辅助电解质情况下,成功利用ZnCl2熔盐制备出了Zn,纯度可达70.74%,验收了工艺的可行性。结果表明,在400～550℃范围内,随着电解温度的升高,熔盐电导率逐渐升高,有利于电解反应。但是继续升高温度至700℃时,ZnCl2蒸气压迅速上升到63.204kPa,挥发造成损失十分严重,且易堵塞出气管,反应温度控制在550℃左右较合适。另外,此工艺由于受ZnCl2本身属性的约束,离产业化还有一定距离。
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| 关 键 词： | 多晶硅 Zn还原法 熔盐电解 ZnCl2 |
Electrolytic Recovery of ZnCl2 Byproduct from Zinc Reduction Method for Polysilicon Rroduction |
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| ZHANG Yuan-cheng,ZHANG Ying-qing,HAN Xiao-long,LI Hong-bo. Electrolytic Recovery of ZnCl2 Byproduct from Zinc Reduction Method for Polysilicon Rroduction[J]. Journal of Qingdao University of Science and Technology:Natutral Science Edition, 2013, 0(1): 38-41 |
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| Authors: | ZHANG Yuan-cheng ZHANG Ying-qing HAN Xiao-long LI Hong-bo |
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| Affiliation: | (Shanghai Solar Energy Research Center Co.,Ltd.,Shanghai 200241,China) |
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| Abstract: | Zinc reduction method for polysilicon production would produce large amounts of ZnCl2.This paper successfully prepared Zinc by ZnCl2 molten salt electrolysis with no other supporting electrolytes,the purity is up to 70.74%.The results show that in the range of 400—550 ℃,the molten salt conductivity gradually increases with the electrolysis temperature going up,which is conducive to the electrolysis reaction.But when the temperature goes up to 700 ℃,ZnCl2 vapor pressure rose rapidly to 63.204 kPa,ZnCl2 losses are very serious by volatilization,and easy to plug the trachea.So the reaction temperature is controlled at about 550 ℃ appropriately.In addition,this process due to the constraints of ZnCl2 itself is has a long way to achieve industrialization. |
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| Keywords: | polysilicon Zn reduction molten salt electrolysis ZnCl2 |
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