熔盐电解二氧化硅制备低硼磷铝硅合金

doi:10.12068/j.issn.1005-3026.2019.09.015

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (9): 1298-1304.DOI: 10.12068/j.issn.1005-3026.2019.09.015

熔盐电解二氧化硅制备低硼磷铝硅合金

管晋钊¹，刘爱民^1,2，徐君莉³，石忠宁^1,2

(1. 东北大学冶金学院，辽宁沈阳110819; 2. 东北大学多金属共生矿生态化冶金教育部重点实验室，辽宁沈阳110819; 3. 东北大学理学院，辽宁沈阳110819)

收稿日期:2018-10-08 修回日期:2018-10-08 出版日期:2019-09-15 发布日期:2019-09-17
通讯作者: 管晋钊
作者简介:管晋钊(1992-)，男，湖北黄冈人，东北大学博士研究生；石忠宁(1975-)，男，广西都安人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51574071)；国家重点研发计划项目(2017YFC0805100)；中央高校基本科研业务费专项资金资助项目(N172502003).

Preparation of Al-Si Alloy with Low Concentration of Boron and Phosphorus by Molten Salt Electrolysis of Silica

GUAN Jin-zhao¹， LIU Ai-min^1,2， XU Jun-li³， SHI Zhong-ning^1,2

1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral， Ministry of Education， Northeastern University， Shenyang 110819， China; 3. School of Sciences， Northeastern University， Shenyang 110819， China.

Received:2018-10-08 Revised:2018-10-08 Online:2019-09-15 Published:2019-09-17
Contact: SHI Zhong-ning
About author:-
Supported by:
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摘要/Abstract

摘要： 分别采用高纯石墨和Fe-Ni合金为阳极，在960℃的冰晶石熔盐中电解SiO₂制备低硼磷铝硅合金，研究电流密度和SiO₂添加量对电流效率、阴极产物成分和B，P杂质含量的影响规律，并利用XRD和SEM表征阴极产物的物相组成和微观形貌.结果表明，以石墨为阳极时，当电流密度从0.5A/cm²增大到0.9A/cm²时，阴极产物中w［Si］从0.75%增大到15.17%，电流效率从2.58%增大到38.06%;B和P的最低质量分数分别为3×10^-6和7×10^-6.以Fe-Ni合金为阳极时，当SiO₂添加量从2%增大到6%时，阴极产物中w［Si］从3.19%增大到19.86%，电流效率从12.43%增大到70.48%;B和P的最低质量分数分别为6×10^-6和11×10^-6;阴极产物的物相组成为铝、硅和铝硅合金.

关键词: 熔盐电解, 冰晶石, 二氧化硅, 硼磷, 铝硅合金

Abstract: Low-boron(B)/phosphorus(P)Al-Si alloys were prepared by electrolysis of silica in cryolite melts at 960℃ using high-purity graphite and Fe-Ni alloy as anodes. The effects of current density and the addition amount of silica to the melts on current efficiency， cathode composition， and impurity(B and P)contents were investigated. The phase composition and microstructure of the cathode product were characterized by XRD and SEM. The results showed that when using graphite anode， the silicon contents in the cathode product increased from 0.75% to 15.17% as the current density increased from 0.5A/cm² to 0.9A/cm²， and the current efficiency increased from 2.58% to 38.06%. The minimum contents of B and P were 3 ×10^-6 and 7×10^-6， respectively. Using Fe-Ni alloy anode， the silicon contents in the cathode product increased from 3.19% to 19.86%， and the current efficiency increased from 12.43% to 70.48% when the addition amount of silica increased from 2% to 6%. The minimum contents of B and P were 6×10^-6 and 11×10^-6， respectively. The phase compositions of the cathode product were Al， Si， and Al-Si alloy.

Key words: molten salt electrolysis, cryolite, silica, boron and phosphorus, Al-Si alloy

中图分类号:

TG146.2

管晋钊，刘爱民，徐君莉，石忠宁. 熔盐电解二氧化硅制备低硼磷铝硅合金[J]. 东北大学学报:自然科学版, 2019, 40(9): 1298-1304.

GUAN Jin-zhao， LIU Ai-min， XU Jun-li， SHI Zhong-ning. Preparation of Al-Si Alloy with Low Concentration of Boron and Phosphorus by Molten Salt Electrolysis of Silica[J]. Journal of Northeastern University Natural Science, 2019, 40(9): 1298-1304.

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熔盐电解二氧化硅制备低硼磷铝硅合金

Preparation of Al-Si Alloy with Low Concentration of Boron and Phosphorus by Molten Salt Electrolysis of Silica

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