Sr和Zr共掺的Al-Si低温溶剂精炼体系下同步去除Si中P和B

陈晨; 李京伟; 左秋霞; 班伯源; 陈健

doi:10.1007/s12613-022-2504-6

Volume 30 Issue 2

Feb. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(2): 365-377

Chen Chen, Jingwei Li, Qiuxia Zuo, Boyuan Ban, and Jian Chen, Simultaneously removal of P and B from Si by Sr and Zr co-addition during Al–Si low-temperature solvent refining, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 365-377. https://doi.org/10.1007/s12613-022-2504-6

Cite this article as:

Chen Chen, Jingwei Li, Qiuxia Zuo, Boyuan Ban, and Jian Chen, Simultaneously removal of P and B from Si by Sr and Zr co-addition during Al–Si low-temperature solvent refining, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 365-377. https://doi.org/10.1007/s12613-022-2504-6

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研究论文

Sr和Zr共掺的Al-Si低温溶剂精炼体系下同步去除Si中P和B

1)
中国科学院合肥物质科学研究院固体物理研究所光伏与节能材料重点实验室, 合肥 230031
2)
中国科学技术大学, 合肥 230026
3)
合肥工业大学材料科学与工程学院, 合肥 230009
4)
矿冶科技集团有限公司选矿国家重点实验室, 北京 100160
5)
昆明理工大学复杂有色金属资源清洁利用国家重点实验室, 昆明 650504
6)
合肥工业大学高性能铜合金材料与加工工程研究中心, 合肥 230009
7)
山东铝业职业学院, 威海 264400

通讯作者:
班伯源 E-mail: jchen@ipp.ac.cn

陈健 E-mail: jchen@ipp.ac.cn

文章亮点

(1) 采用四元合金体系同步并有效地去除了Si中的P和B

(2) 提纯Si中P和B的最佳去除率分别达到了98.4%和96.1%

(3) 建立了杂质相与初晶Si相互作用的演化模型

中文摘要

目前大多数的合金法研究都是添加一种过渡族金属元素到熔炼体系中来达到有效去除Si中B、P的目的。但事实上，冶金硅中存在的非金属杂质元素通常是B、P共存。因此，同时高效的去除Si中B、P技术明显更适合于实际生产应用。为了同步高效去除初晶Si中的关键杂质元素P和B，我们首先采用Zr和Sr作为Al-Si凝固精炼过程中的B和P捕获剂元素。在Al-Si-Zr-Sr体系中，Al-Si合金中Zr和Sr的加入可以在熔体中析出ZrB₂相和含P的Al₂Si₂Sr相。在Al-Si-Sr-Zr体系中，初晶Si中P和B的去除率分别在84.8% ~ 98.4%和90.7% ~ 96.7%范围内。其中Sr-32000+Zr-3000 (μg·kg^-1)试样条件的去除效果最好，初晶Si中P和B的去除率分别达到了98.4%和96.1%。通过Al–Si–Zr–Sr体系和Al–Si–(Zr或Sr)体系的对比研究，Sr和Zr共掺对P和B的去除效果没有明显的下降趋势，说明含B/P杂质相的成核和生长是相互独立的。最后，我们建立了Sr/Zr析出相在熔体中形核和生长过程的演化模型，并揭示了杂质相与初晶Si之间的相互作用。

关键词:

Research Article

Simultaneously removal of P and B from Si by Sr and Zr co-addition during Al–Si low-temperature solvent refining

+ Author Affiliations

1)
Key Lab of Photovoltaic and Energy Conservation Materials, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
2)
University of Science and Technology of China, Hefei 230026, China
3)
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
4)
State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 100160, China
5)
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650504, China
6)
Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei University of Technology, Hefei 230009, China
7)
Shandong Aluminum Vocational College, Weihai 264400, China

Corresponding authors:
Boyuan Ban E-mail: jchen@ipp.ac.cn

Jian Chen E-mail: jchen@ipp.ac.cn
Received: 18 February 2022; Revised: 17 April 2022; Accepted: 18 April 2022; Available online: 19 April 2022

Abstract

Abstract

To remove the key impurity elements, P and B, from primary Si simultaneously, Sr and Zr co-addition to Al–Si alloy systems during solvent refining has been investigated. Sr reacts with Al, Si, and P in the melt to form a P-containing Al₂Si₂Sr phase and Zr reacts with B to form a ZrB₂ phase. In the Al–Si–Sr–Zr system, high removal fractions of P and B in the primary Si, with 84.8%–98.4% and 90.7%–96.7%, respectively, are achieved at the same time, respectively. The best removal effect is obtained in the sample with the addition of Sr-32000+Zr-3000 μg·kg^–1, and the removal fractions of P and B in the purified Si reach 98.4% and 96.1%. Compared with the Sr/Zr single-addition, the removal effects of Sr and Zr co-addition on P and B do not show a significant downward trend, indicating that the nucleation and growth of the B/P-containing impurity phases are mutually independent. Finally, an evolution model is proposed to describe the nucleation and the growth stages of Sr/Zr-containing compound phases, which reveals the interaction between the impurity phases and the primary Si.
- Al₂Si₂Sr phase;
- zirconium boride phase phase;
- directional solidification;
- solvent refining

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Sr和Zr共掺的Al-Si低温溶剂精炼体系下同步去除Si中P和B

文章亮点

中文摘要

Simultaneously removal of P and B from Si by Sr and Zr co-addition during Al–Si low-temperature solvent refining

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