上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (3): 263-267.doi: 10.1007/s12204-012-1265-1

• 论文 • 上一篇    下一篇

Recycling of Aluminum from Fibre Metal Laminates

ZHU Guo-liang1,2 (祝国梁), XIAO Yan-ping1,3 (肖艳萍), YANG Yong-xiang1,3,4 (杨永祥) WANG Jun2 (王俊), SUN Bao-de2 (孙宝德), BOOM Rob1   

  1. (1. Department of Materials Science and Engineering, Delft University of Technology, 2628 CD Delft, The Netherlands; 2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China; 3. Department of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, Anhui, China; 4. Institute of Ferrous Metallurgy, Northeastern University, Shenyang 110819, China)
  • 出版日期:2012-06-30 发布日期:2012-11-15
  • 通讯作者: ZHU Guo-liang1,2 (祝国梁) E-mail: glzhu1983@hotmail.com

Recycling of Aluminum from Fibre Metal Laminates

ZHU Guo-liang1,2 (祝国梁), XIAO Yan-ping1,3 (肖艳萍), YANG Yong-xiang1,3,4 (杨永祥) WANG Jun2 (王俊), SUN Bao-de2 (孙宝德), BOOM Rob1   

  1. (1. Department of Materials Science and Engineering, Delft University of Technology, 2628 CD Delft, The Netherlands; 2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China; 3. Department of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, Anhui, China; 4. Institute of Ferrous Metallurgy, Northeastern University, Shenyang 110819, China)
  • Online:2012-06-30 Published:2012-11-15
  • Contact: ZHU Guo-liang1,2 (祝国梁) E-mail: glzhu1983@hotmail.com

摘要： Recycling of aluminum alloy scrap obtained from delaminated fibre metal laminates (FMLs) was studied through high temperature refining in the presence of a salt flux. The aluminum alloy scrap contains approximately mass fraction w(Cu) = 4.4%, w(Mg) = 1.1% and w(Mn) = 0.6% (2024 aluminum alloy). The main objective of this research is to obtain a high metal yield, while maintaining its original alloy compositions. The work focuses on the metal yield and quality of recycled Al alloy under different refining conditions. The NaCl-KCl salt system was selected as the major components of flux in the Al alloy recycling. Two different flux compositions were employed at NaCl to KCl mass ratios of 44:56 and 70:30 respectively, based on either the eutectic composition, or the European preference. Different additives were introduced into the NaCl-KCl system to study the effect of flux component on recycling result. Although burning and oxidation loss of the alloying elements during re-melting and refining take place as the drawbacks of conventional refining process, the problems can be solved to a large extent by using an appropriate salt flux. Experimental results indicate that Mg in the alloy gets lost when adding cryolite in the NaCl-KCl salt system, though the metal yield can reach as high as 98%. However, by adding w(MgF2) = 5% into the NaCl-KCl salt system (instead of using cryolite) all alloying elements were well controlled to its original composition with a metal yield of almost 98%.

关键词: Al-Cu-Mg alloy, 2024 Al, recycling, cryolite, salt flux

Abstract: Recycling of aluminum alloy scrap obtained from delaminated fibre metal laminates (FMLs) was studied through high temperature refining in the presence of a salt flux. The aluminum alloy scrap contains approximately mass fraction w(Cu) = 4.4%, w(Mg) = 1.1% and w(Mn) = 0.6% (2024 aluminum alloy). The main objective of this research is to obtain a high metal yield, while maintaining its original alloy compositions. The work focuses on the metal yield and quality of recycled Al alloy under different refining conditions. The NaCl-KCl salt system was selected as the major components of flux in the Al alloy recycling. Two different flux compositions were employed at NaCl to KCl mass ratios of 44:56 and 70:30 respectively, based on either the eutectic composition, or the European preference. Different additives were introduced into the NaCl-KCl system to study the effect of flux component on recycling result. Although burning and oxidation loss of the alloying elements during re-melting and refining take place as the drawbacks of conventional refining process, the problems can be solved to a large extent by using an appropriate salt flux. Experimental results indicate that Mg in the alloy gets lost when adding cryolite in the NaCl-KCl salt system, though the metal yield can reach as high as 98%. However, by adding w(MgF2) = 5% into the NaCl-KCl salt system (instead of using cryolite) all alloying elements were well controlled to its original composition with a metal yield of almost 98%.

Key words: Al-Cu-Mg alloy, 2024 Al, recycling, cryolite, salt flux

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